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Plugin for DataNucleus providing persistence to RDBMS datastores.
/**********************************************************************
Copyright (c) 2008 Andy Jefferson and others. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Contributors:
...
**********************************************************************/
package org.datanucleus.store.rdbms.query;
import java.lang.reflect.Constructor;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Deque;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.StringTokenizer;
import org.datanucleus.ClassLoaderResolver;
import org.datanucleus.ExecutionContext;
import org.datanucleus.FetchGroup;
import org.datanucleus.FetchGroupManager;
import org.datanucleus.FetchPlan;
import org.datanucleus.FetchPlanForClass;
import org.datanucleus.exceptions.ClassNotResolvedException;
import org.datanucleus.exceptions.NucleusException;
import org.datanucleus.exceptions.NucleusUserException;
import org.datanucleus.metadata.AbstractClassMetaData;
import org.datanucleus.metadata.AbstractMemberMetaData;
import org.datanucleus.metadata.DiscriminatorMetaData;
import org.datanucleus.metadata.DiscriminatorStrategy;
import org.datanucleus.metadata.FieldPersistenceModifier;
import org.datanucleus.metadata.IdentityType;
import org.datanucleus.metadata.InheritanceStrategy;
import org.datanucleus.metadata.MapMetaData;
import org.datanucleus.metadata.MetaDataManager;
import org.datanucleus.metadata.RelationType;
import org.datanucleus.metadata.VersionMetaData;
import org.datanucleus.metadata.VersionStrategy;
import org.datanucleus.metadata.MapMetaData.MapType;
import org.datanucleus.query.NullOrderingType;
import org.datanucleus.query.QueryUtils;
import org.datanucleus.query.compiler.CompilationComponent;
import org.datanucleus.query.compiler.QueryCompilation;
import org.datanucleus.query.evaluator.AbstractExpressionEvaluator;
import org.datanucleus.query.expression.ArrayExpression;
import org.datanucleus.query.expression.CaseExpression;
import org.datanucleus.query.expression.CaseExpression.ExpressionPair;
import org.datanucleus.query.expression.ClassExpression;
import org.datanucleus.query.expression.CreatorExpression;
import org.datanucleus.query.expression.DyadicExpression;
import org.datanucleus.query.expression.Expression;
import org.datanucleus.query.expression.Expression.Operator;
import org.datanucleus.query.expression.InvokeExpression;
import org.datanucleus.query.expression.JoinExpression;
import org.datanucleus.query.expression.Literal;
import org.datanucleus.query.expression.OrderExpression;
import org.datanucleus.query.expression.ParameterExpression;
import org.datanucleus.query.expression.PrimaryExpression;
import org.datanucleus.query.expression.SubqueryExpression;
import org.datanucleus.query.expression.VariableExpression;
import org.datanucleus.query.expression.JoinExpression.JoinType;
import org.datanucleus.query.symbol.Symbol;
import org.datanucleus.state.ObjectProvider;
import org.datanucleus.store.VersionHelper;
import org.datanucleus.store.rdbms.adapter.DatastoreAdapter;
import org.datanucleus.store.rdbms.mapping.MappingConsumer;
import org.datanucleus.store.rdbms.mapping.StatementClassMapping;
import org.datanucleus.store.rdbms.mapping.StatementMappingIndex;
import org.datanucleus.store.rdbms.mapping.java.AbstractContainerMapping;
import org.datanucleus.store.rdbms.mapping.java.EmbeddedMapping;
import org.datanucleus.store.rdbms.mapping.java.JavaTypeMapping;
import org.datanucleus.store.rdbms.mapping.java.DatastoreIdMapping;
import org.datanucleus.store.rdbms.mapping.java.PersistableIdMapping;
import org.datanucleus.store.rdbms.mapping.java.PersistableMapping;
import org.datanucleus.store.rdbms.mapping.java.ReferenceMapping;
import org.datanucleus.store.rdbms.mapping.java.StringMapping;
import org.datanucleus.store.rdbms.mapping.java.TemporalMapping;
import org.datanucleus.store.query.QueryCompilerSyntaxException;
import org.datanucleus.store.rdbms.RDBMSStoreManager;
import org.datanucleus.store.rdbms.sql.SQLJoin;
import org.datanucleus.store.rdbms.sql.SQLStatement;
import org.datanucleus.store.rdbms.sql.SQLStatementHelper;
import org.datanucleus.store.rdbms.sql.SQLTable;
import org.datanucleus.store.rdbms.sql.expression.BooleanExpression;
import org.datanucleus.store.rdbms.sql.expression.BooleanLiteral;
import org.datanucleus.store.rdbms.sql.expression.BooleanSubqueryExpression;
import org.datanucleus.store.rdbms.sql.expression.ColumnExpression;
import org.datanucleus.store.rdbms.sql.expression.ExpressionUtils;
import org.datanucleus.store.rdbms.sql.expression.IntegerLiteral;
import org.datanucleus.store.rdbms.sql.expression.MapExpression;
import org.datanucleus.store.rdbms.sql.expression.NewObjectExpression;
import org.datanucleus.store.rdbms.sql.expression.NumericExpression;
import org.datanucleus.store.rdbms.sql.expression.NumericSubqueryExpression;
import org.datanucleus.store.rdbms.sql.expression.ParameterLiteral;
import org.datanucleus.store.rdbms.sql.expression.ResultAliasExpression;
import org.datanucleus.store.rdbms.sql.expression.SQLExpression;
import org.datanucleus.store.rdbms.sql.expression.SQLExpressionFactory;
import org.datanucleus.store.rdbms.sql.expression.SQLLiteral;
import org.datanucleus.store.rdbms.sql.expression.StringSubqueryExpression;
import org.datanucleus.store.rdbms.sql.expression.SubqueryExpressionComponent;
import org.datanucleus.store.rdbms.sql.expression.TemporalLiteral;
import org.datanucleus.store.rdbms.sql.expression.TemporalSubqueryExpression;
import org.datanucleus.store.rdbms.sql.expression.UnboundExpression;
import org.datanucleus.store.rdbms.table.ClassTable;
import org.datanucleus.store.rdbms.table.CollectionTable;
import org.datanucleus.store.rdbms.table.DatastoreClass;
import org.datanucleus.store.rdbms.table.ElementContainerTable;
import org.datanucleus.store.rdbms.table.JoinTable;
import org.datanucleus.store.rdbms.table.MapTable;
import org.datanucleus.store.rdbms.table.Table;
import org.datanucleus.util.ClassUtils;
import org.datanucleus.util.Imports;
import org.datanucleus.util.Localiser;
import org.datanucleus.util.NucleusLogger;
import org.datanucleus.util.StringUtils;
/**
* Class which maps a compiled (generic) query to an SQL query for RDBMS datastores.
* Takes in an SQLStatement, and use of compile() will update the SQLStatement to reflect
* the filter, result, grouping, having, ordering etc.
*
* Supports the following extensions currently :-
*
* - datanucleus.query.jdoql.{varName}.join defines the join type for that alias. This only currently
* applies if the variable is (finally) bound using the equality operator (e.g var.field == this.field).
* The extension should be set to "LEFTOUTERJOIN", "INNERJOIN"
*
*/
public class QueryToSQLMapper extends AbstractExpressionEvaluator implements QueryGenerator
{
public static final String OPTION_CASE_INSENSITIVE = "CASE_INSENSITIVE";
public static final String OPTION_EXPLICIT_JOINS = "EXPLICIT_JOINS";
public static final String OPTION_BULK_UPDATE_VERSION = "BULK_UPDATE_VERSION";
public static final String OPTION_BULK_DELETE_NO_RESULT = "BULK_DELETE_NO_RESULT";
public static final String OPTION_SELECT_CANDIDATE_ID_ONLY = "RESULT_CANDIDATE_ID";
public static final String OPTION_NULL_PARAM_USE_IS_NULL = "USE_IS_NULL_FOR_NULL_PARAM";
final String candidateAlias;
final AbstractClassMetaData candidateCmd;
final boolean subclasses;
final QueryCompilation compilation;
/** Input parameter values, keyed by the parameter name. Will be null if compiled pre-execution. */
final Map parameters;
/** Work Map for keying parameter value for the name, for case where parameters input as positional. */
Map parameterValueByName = null;
Map paramNameByPosition = null;
/** Positional parameter that we are up to (-1 implies not being used). */
int positionalParamNumber = -1;
/** Map of query extensions defining behaviour on the compilation. */
Map extensionsByName = null;
/** SQL statement that we are updating. */
final SQLStatement stmt;
/** Definition of mapping for the results of this SQL statement (candidate). */
final StatementClassMapping resultDefinitionForClass;
/** Definition of mapping for the results of this SQL statement (result). */
final StatementResultMapping resultDefinition;
Map expressionForParameter;
final RDBMSStoreManager storeMgr;
final FetchPlan fetchPlan;
final SQLExpressionFactory exprFactory;
ExecutionContext ec;
ClassLoaderResolver clr;
Imports importsDefinition = null;
Map compileProperties = new HashMap();
/** State variable for the component being compiled. */
CompilationComponent compileComponent;
/** Stack of expressions, used for compilation of the query into SQL. */
Deque stack = new ArrayDeque();
/** Map of SQLTable/mapping keyed by the name of the primary that it relates to. */
Map sqlTableByPrimary = new HashMap();
/** Aliases defined in the result, populated during compileResult. */
Set resultAliases = null;
/** Map of the join primary expression string keyed by the join alias (explicit joins only). */
Map explicitJoinPrimaryByAlias = null;
Map paramMappingForName = new HashMap();
/** Options for the SQL generation process. See OPTION_xxx above. */
Set options = new HashSet();
/** Parent mapper if we are processing a subquery. */
public QueryToSQLMapper parentMapper = null;
org.datanucleus.store.rdbms.sql.SQLJoin.JoinType defaultJoinType = null;
/**
* State variable for whether this query is precompilable (hence whether it is cacheable).
* Or in other words, whether we can compile it without knowing parameter values.
*/
boolean precompilable = true;
static class SQLTableMapping
{
SQLTable table;
AbstractClassMetaData cmd;
JavaTypeMapping mapping;
AbstractMemberMetaData mmd;
public SQLTableMapping(SQLTable tbl, AbstractClassMetaData cmd, JavaTypeMapping m)
{
this.table = tbl;
this.cmd = cmd;
this.mmd = null;
this.mapping = m;
}
/**
* Constructor for use when we have a Map field.
*/
public SQLTableMapping(SQLTable tbl, AbstractMemberMetaData mmd, JavaTypeMapping m)
{
this.table = tbl;
this.cmd = mmd.getAbstractClassMetaData();
this.mmd = mmd;
this.mapping = m;
}
public String toString()
{
if (mmd != null)
{
return "SQLTableMapping: tbl=" + table + " member=" + mmd.getFullFieldName() + " mapping=" + mapping;
}
return "SQLTableMapping: tbl=" + table + " class=" + (cmd != null ? cmd.getFullClassName() : "null") + " mapping=" + mapping;
}
}
/**
* Constructor.
* @param stmt SQL Statement to update with the query contents.
* @param compilation The generic query compilation
* @param parameters Parameters needed
* @param resultDefForClass Definition of results for the statement (populated here)
* @param resultDef Definition of results if we have a result clause (populated here)
* @param cmd Metadata for the candidate class
* @param subclasses Whether to include subclasses
* @param fetchPlan Fetch Plan to apply
* @param ec execution context
* @param importsDefinition Import definition to use in class lookups (optional)
* @param options Options controlling behaviour
* @param extensions Any query extensions that may define compilation behaviour
*/
public QueryToSQLMapper(SQLStatement stmt, QueryCompilation compilation, Map parameters,
StatementClassMapping resultDefForClass, StatementResultMapping resultDef,
AbstractClassMetaData cmd, boolean subclasses, FetchPlan fetchPlan, ExecutionContext ec, Imports importsDefinition,
Set options, Map extensions)
{
this.parameters = parameters;
this.compilation = compilation;
this.stmt = stmt;
this.resultDefinitionForClass = resultDefForClass;
this.resultDefinition = resultDef;
this.candidateCmd = cmd;
this.candidateAlias = compilation.getCandidateAlias();
this.subclasses = subclasses;
this.fetchPlan = fetchPlan;
this.storeMgr = stmt.getRDBMSManager();
this.exprFactory = stmt.getRDBMSManager().getSQLExpressionFactory();
this.ec = ec;
this.clr = ec.getClassLoaderResolver();
this.importsDefinition = importsDefinition;
if (options != null)
{
this.options.addAll(options);
}
this.extensionsByName = extensions;
this.stmt.setQueryGenerator(this);
// Register the candidate
SQLTableMapping tblMapping = new SQLTableMapping(stmt.getPrimaryTable(), candidateCmd, stmt.getPrimaryTable().getTable().getIdMapping());
setSQLTableMappingForAlias(candidateAlias, tblMapping);
}
/**
* Method to set the default join type to be used.
* By default we use the nullability of the field to define whether to use LEFT OUTER, or INNER.
* In JPQL if a relation isn't specified explicitly in the FROM clause then it should use INNER
* hence where this method will be used, to define the default.
* @param joinType The default join type
*/
void setDefaultJoinType(org.datanucleus.store.rdbms.sql.SQLJoin.JoinType joinType)
{
this.defaultJoinType = joinType;
}
void setParentMapper(QueryToSQLMapper parent)
{
this.parentMapper = parent;
}
/**
* Accessor for the query language that this query pertains to.
* Can be used to decide how to handle the input.
* @return The query language
*/
public String getQueryLanguage()
{
return compilation.getQueryLanguage();
}
/* (non-Javadoc)
* @see org.datanucleus.store.rdbms.query.QueryGenerator#getClassLoaderResolver()
*/
public ClassLoaderResolver getClassLoaderResolver()
{
return clr;
}
/* (non-Javadoc)
* @see org.datanucleus.store.rdbms.query.QueryGenerator#getCompilationComponent()
*/
public CompilationComponent getCompilationComponent()
{
return compileComponent;
}
/* (non-Javadoc)
* @see org.datanucleus.store.rdbms.query.QueryGenerator#getExecutionContext()
*/
public ExecutionContext getExecutionContext()
{
return ec;
}
/* (non-Javadoc)
* @see org.datanucleus.store.rdbms.query.QueryGenerator#getProperty(java.lang.String)
*/
public Object getProperty(String name)
{
return compileProperties.get(name);
}
/**
* Accessor for whether the query is precompilable (doesn't need to know parameter values
* to be able to compile it).
* @return Whether the query is precompilable and hence cacheable
*/
public boolean isPrecompilable()
{
return precompilable;
}
protected void setNotPrecompilable()
{
if (parentMapper != null)
{
parentMapper.setNotPrecompilable();
}
this.precompilable = false;
}
/**
* Convenience accessor for a map of the parameter name keyed by its position.
* This is only available after compile
is called.
* @return Map of parameter name keyed by position
*/
public Map getParameterNameByPosition()
{
return paramNameByPosition;
}
/**
* Method to update the supplied SQLStatement with the components of the specified query.
* During the compilation process this updates the SQLStatement "compileComponent" to the
* component of the query being compiled.
*/
public void compile()
{
compileFrom();
compileFilter();
// Set whether the statement returns distinct. Do this before processing the result in case
// the datastore doesn't allow select of some field types when used with DISTINCT
if (compilation.getResultDistinct())
{
stmt.setDistinct(true);
}
else if (!options.contains(OPTION_EXPLICIT_JOINS) && compilation.getExprResult() == null)
{
// Joins are made implicitly and no result so set distinct based on whether joining to other table groups
if (stmt.getNumberOfTableGroups() > 1)
{
// Queries against an extent always consider only distinct candidate instances, regardless of
// whether distinct is specified (JDO spec)
stmt.setDistinct(true);
}
}
compileResult();
compileGrouping();
compileHaving();
compileOrdering();
// Check for variables that haven't been bound to the query (declared but not used)
Collection symbols = compilation.getSymbolTable().getSymbolNames();
Iterator symIter = symbols.iterator();
while (symIter.hasNext())
{
Symbol sym = compilation.getSymbolTable().getSymbol(symIter.next());
if (sym.getType() == Symbol.VARIABLE)
{
if (compilation.getCompilationForSubquery(sym.getQualifiedName()) == null && !hasSQLTableMappingForAlias(sym.getQualifiedName()))
{
// Variable not a subquery, nor had its table allocated
throw new QueryCompilerSyntaxException("Query has variable \"" + sym.getQualifiedName() + "\" which is not bound to the query");
}
}
}
}
/**
* Method to compile the FROM clause of the query into the SQLStatement.
*/
protected void compileFrom()
{
if (compilation.getExprFrom() != null)
{
// Process all ClassExpression(s) in the FROM, adding joins to the statement as required
compileComponent = CompilationComponent.FROM;
Expression[] fromExprs = compilation.getExprFrom();
for (int i=0;i
* queries of the candidate (no specified result), selecting the candidate field(s).
* update clauses of queries
*
*/
protected void compileResult()
{
if (compilation.getExprUpdate() != null)
{
// Update statement, so generate update expression(s)
compileComponent = CompilationComponent.UPDATE;
Expression[] updateExprs = compilation.getExprUpdate();
SQLExpression[] updateSqlExprs = new SQLExpression[updateExprs.length];
// TODO If the field being set is in a different table omit it
boolean performingUpdate = false;
for (int i=0;i();
}
if (resultExprs[i] instanceof InvokeExpression)
{
InvokeExpression invokeExpr = (InvokeExpression)resultExprs[i];
processInvokeExpression((InvokeExpression)resultExprs[i]);
SQLExpression sqlExpr = stack.pop();
validateExpressionForResult(sqlExpr);
String invokeMethod = invokeExpr.getOperation();
if ((invokeMethod.equalsIgnoreCase("mapKey") || invokeMethod.equalsIgnoreCase("mapValue")) && alias == null)
{
if (sqlExpr.getJavaTypeMapping() instanceof PersistableMapping)
{
// Method returns persistable object, so select the FetchPlan
String selectedType = ((PersistableMapping)sqlExpr.getJavaTypeMapping()).getType();
AbstractClassMetaData selectedCmd = ec.getMetaDataManager().getMetaDataForClass(selectedType, clr);
FetchPlanForClass fpForCmd = fetchPlan.getFetchPlanForClass(selectedCmd);
int[] membersToSelect = fpForCmd.getMemberNumbers();
ClassTable selectedTable = (ClassTable) sqlExpr.getSQLTable().getTable();
StatementClassMapping map = new StatementClassMapping(selectedCmd.getFullClassName(), null);
if (selectedCmd.getIdentityType() == IdentityType.DATASTORE)
{
int[] cols = stmt.select(sqlExpr.getSQLTable(), selectedTable.getDatastoreIdMapping(), alias);
StatementMappingIndex idx = new StatementMappingIndex(selectedTable.getDatastoreIdMapping());
idx.setColumnPositions(cols);
map.addMappingForMember(StatementClassMapping.MEMBER_DATASTORE_ID, idx);
}
// Select the FetchPlan members
for (int j=0;j=0;i--)
{
AbstractMemberMetaData leftMmd = leftMmds[i];
AbstractMemberMetaData rightMmd = rightMmds[i];
DatastoreClass leftTbl = storeMgr.getDatastoreClass(leftMmd.getClassName(true), clr);
SQLTable lSqlTbl = null;
RelationType relationType = leftMmd.getRelationType(clr);
if (relationType == RelationType.ONE_TO_ONE_UNI)
{
// 1-1 with FK in left table
if (i == 0)
{
// Add where clause right table to outer table
SQLExpression outerExpr = exprFactory.newExpression(outerSqlTbl.getSQLStatement(), outerSqlTbl, outerSqlTbl.getTable().getMemberMapping(leftMmd));
SQLExpression rightExpr = exprFactory.newExpression(stmt, rSqlTbl, rSqlTbl.getTable().getIdMapping());
stmt.whereAnd(outerExpr.eq(rightExpr), false);
}
else
{
// Join to left table
JavaTypeMapping leftMapping = leftTbl.getMemberMapping(leftMmd);
lSqlTbl = stmt.innerJoin(rSqlTbl, rSqlTbl.getTable().getIdMapping(), leftTbl, null, leftMapping, null, null);
}
}
else if (relationType == RelationType.ONE_TO_ONE_BI)
{
if (leftMmd.getMappedBy() != null)
{
// 1-1 with FK in right table
JavaTypeMapping rightMapping = rSqlTbl.getTable().getMemberMapping(rightMmd);
if (i == 0)
{
// Add where clause right table to outer table
SQLExpression outerExpr = exprFactory.newExpression(outerSqlTbl.getSQLStatement(), outerSqlTbl, outerSqlTbl.getTable().getIdMapping());
SQLExpression rightExpr = exprFactory.newExpression(stmt, rSqlTbl, rightMapping);
stmt.whereAnd(outerExpr.eq(rightExpr), false);
}
else
{
// Join to left table
lSqlTbl = stmt.innerJoin(rSqlTbl, rightMapping, leftTbl, null, leftTbl.getIdMapping(), null, null);
}
}
else
{
// 1-1 with FK in left table
if (i == 0)
{
// Add where clause right table to outer table
SQLExpression outerExpr = exprFactory.newExpression(outerSqlTbl.getSQLStatement(), outerSqlTbl, outerSqlTbl.getTable().getMemberMapping(leftMmd));
SQLExpression rightExpr = exprFactory.newExpression(stmt, rSqlTbl, rSqlTbl.getTable().getIdMapping());
stmt.whereAnd(outerExpr.eq(rightExpr), false);
}
else
{
// Join to left table
lSqlTbl = stmt.innerJoin(rSqlTbl, rSqlTbl.getTable().getIdMapping(), leftTbl, null, leftTbl.getMemberMapping(leftMmd), null, null);
}
}
}
else if (relationType == RelationType.ONE_TO_MANY_UNI)
{
if (leftMmd.getJoinMetaData() != null || rightMmd.getJoinMetaData() != null)
{
// 1-N with join table to right table, so join from right to join table
JoinTable joinTbl = (JoinTable) storeMgr.getTable(leftMmd);
SQLTable joinSqlTbl = null;
if (leftMmd.hasCollection())
{
joinSqlTbl = stmt.innerJoin(rSqlTbl, rSqlTbl.getTable().getIdMapping(), joinTbl, null, ((ElementContainerTable)joinTbl).getElementMapping(), null, null);
}
else if (leftMmd.hasMap())
{
joinSqlTbl = stmt.innerJoin(rSqlTbl, rSqlTbl.getTable().getIdMapping(), joinTbl, null, ((MapTable)joinTbl).getValueMapping(), null, null);
}
if (i == 0)
{
// Add where clause join table to outer table
SQLExpression outerExpr = exprFactory.newExpression(outerSqlTbl.getSQLStatement(), outerSqlTbl, outerSqlTbl.getTable().getMemberMapping(leftMmd));
SQLExpression joinExpr = exprFactory.newExpression(stmt, joinSqlTbl, joinTbl.getOwnerMapping());
stmt.whereAnd(outerExpr.eq(joinExpr), false);
}
else
{
// Join to left table
lSqlTbl = stmt.innerJoin(joinSqlTbl, joinTbl.getOwnerMapping(), leftTbl, null, leftTbl.getIdMapping(), null, null);
}
}
else
{
// 1-N with FK in right table
if (i == 0)
{
// Add where clause right table to outer table
SQLExpression outerExpr = exprFactory.newExpression(outerSqlTbl.getSQLStatement(), outerSqlTbl, outerSqlTbl.getTable().getMemberMapping(leftMmd));
SQLExpression rightExpr = exprFactory.newExpression(stmt, rSqlTbl, rSqlTbl.getTable().getMemberMapping(rightMmd));
stmt.whereAnd(outerExpr.eq(rightExpr), false);
}
else
{
// Join to left table
lSqlTbl = stmt.innerJoin(rSqlTbl, rSqlTbl.getTable().getMemberMapping(rightMmd), leftTbl, null, leftTbl.getIdMapping(), null, null);
}
}
}
else if (relationType == RelationType.ONE_TO_MANY_BI)
{
if (leftMmd.getJoinMetaData() != null || rightMmd.getJoinMetaData() != null)
{
// 1-N with join table to right table, so join from right to join table
JoinTable joinTbl = (JoinTable) storeMgr.getTable(leftMmd);
SQLTable joinSqlTbl = null;
if (leftMmd.hasCollection())
{
joinSqlTbl = stmt.innerJoin(rSqlTbl, rSqlTbl.getTable().getIdMapping(), joinTbl, null, ((ElementContainerTable)joinTbl).getElementMapping(), null, null);
}
else if (leftMmd.hasMap())
{
joinSqlTbl = stmt.innerJoin(rSqlTbl, rSqlTbl.getTable().getIdMapping(), joinTbl, null, ((MapTable)joinTbl).getValueMapping(), null, null);
}
if (i == 0)
{
// Add where clause join table to outer table
SQLExpression outerExpr = exprFactory.newExpression(outerSqlTbl.getSQLStatement(), outerSqlTbl, outerSqlTbl.getTable().getMemberMapping(leftMmd));
SQLExpression joinExpr = exprFactory.newExpression(stmt, joinSqlTbl, joinTbl.getOwnerMapping());
stmt.whereAnd(outerExpr.eq(joinExpr), false);
}
else
{
// Join to left table
lSqlTbl = stmt.innerJoin(joinSqlTbl, joinTbl.getOwnerMapping(), leftTbl, null, leftTbl.getIdMapping(), null, null);
}
}
else
{
// 1-N with FK in right table
if (i == 0)
{
// Add where clause right table to outer table
SQLExpression outerExpr = exprFactory.newExpression(outerSqlTbl.getSQLStatement(), outerSqlTbl, outerSqlTbl.getTable().getIdMapping());
SQLExpression rightExpr = exprFactory.newExpression(stmt, rSqlTbl, rSqlTbl.getTable().getMemberMapping(rightMmd));
stmt.whereAnd(outerExpr.eq(rightExpr), false);
}
else
{
// Join to left table
lSqlTbl = stmt.innerJoin(rSqlTbl, rSqlTbl.getTable().getMemberMapping(rightMmd), leftTbl, null, leftTbl.getIdMapping(), null, null);
}
}
}
else if (relationType == RelationType.MANY_TO_ONE_BI)
{
if (leftMmd.getJoinMetaData() != null || rightMmd.getJoinMetaData() != null)
{
// 1-N with join table to right table, so join from right to join table
JoinTable joinTbl = (JoinTable) storeMgr.getTable(leftMmd);
SQLTable joinSqlTbl = stmt.innerJoin(rSqlTbl, rSqlTbl.getTable().getIdMapping(), joinTbl, null, joinTbl.getOwnerMapping(), null, null);
if (leftMmd.hasCollection())
{
if (i == 0)
{
// Add where clause join table to outer table
SQLExpression outerExpr = exprFactory.newExpression(outerSqlTbl.getSQLStatement(), outerSqlTbl, outerSqlTbl.getTable().getMemberMapping(leftMmd));
SQLExpression joinExpr = exprFactory.newExpression(stmt, joinSqlTbl, ((ElementContainerTable)joinTbl).getElementMapping());
stmt.whereAnd(outerExpr.eq(joinExpr), false);
}
else
{
// Join to left table
lSqlTbl = stmt.innerJoin(joinSqlTbl, ((ElementContainerTable)joinTbl).getElementMapping(), leftTbl, null, leftTbl.getIdMapping(), null, null);
}
}
else if (leftMmd.hasMap())
{
if (i == 0)
{
// Add where clause join table to outer table
SQLExpression outerExpr = exprFactory.newExpression(outerSqlTbl.getSQLStatement(), outerSqlTbl, outerSqlTbl.getTable().getMemberMapping(leftMmd));
SQLExpression joinExpr = exprFactory.newExpression(stmt, joinSqlTbl, ((MapTable)joinTbl).getValueMapping());
stmt.whereAnd(outerExpr.eq(joinExpr), false);
}
else
{
// Join to left table
lSqlTbl = stmt.innerJoin(joinSqlTbl, ((MapTable)joinTbl).getValueMapping(), leftTbl, null, leftTbl.getIdMapping(), null, null);
}
}
}
else
{
if (i == 0)
{
// Add where clause right table to outer table
SQLExpression outerExpr = exprFactory.newExpression(outerSqlTbl.getSQLStatement(), outerSqlTbl, outerSqlTbl.getTable().getMemberMapping(leftMmd));
SQLExpression rightExpr = exprFactory.newExpression(stmt, rSqlTbl, rSqlTbl.getTable().getIdMapping());
stmt.whereAnd(outerExpr.eq(rightExpr), false);
}
else
{
// Join to left table
lSqlTbl = stmt.innerJoin(rSqlTbl, rSqlTbl.getTable().getIdMapping(), leftTbl, null, leftTbl.getMemberMapping(leftMmd), null, null);
}
}
}
rSqlTbl = lSqlTbl;
}
}
// Process all join expressions
Expression rightExpr = clsExpr.getRight();
SQLTable sqlTbl = candSqlTbl;
while (rightExpr != null)
{
if (rightExpr instanceof JoinExpression)
{
JoinExpression joinExpr = (JoinExpression)rightExpr;
JoinType joinType = joinExpr.getType();
String joinAlias = joinExpr.getAlias();
PrimaryExpression joinPrimExpr = joinExpr.getPrimaryExpression();
Iterator iter = joinPrimExpr.getTuples().iterator();
String rootId = iter.next();
String joinTableGroupName = null;
if (rootId.equalsIgnoreCase(candidateAlias) && candidateCmd.getName().equals(cmd.getName()))
{
// Join relative to the candidate
// Name table group of joined-to as per the relation
// Note : this will only work for one level out from the candidate TODO Extend this
joinTableGroupName = joinPrimExpr.getId();
}
else
{
// Join relative to some other alias
SQLTableMapping sqlTblMapping = getSQLTableMappingForAlias(rootId);
if (sqlTblMapping != null)
{
if (sqlTblMapping.mmd != null)
{
// Map alias : assumed to be referring to the value of the Map
cmd = sqlTblMapping.mmd.getMap().getValueClassMetaData(clr, mmgr);
// TODO Clean this up so we match when it is present
sqlTbl = stmt.getTable(rootId + "_VALUE");
if (sqlTbl == null)
{
sqlTbl = stmt.getTable((rootId + "_VALUE").toUpperCase());
}
}
else
{
cmd = sqlTblMapping.cmd;
sqlTbl = sqlTblMapping.table;
}
joinTableGroupName = sqlTbl.getGroupName() + joinPrimExpr.getId().substring(rootId.length());
}
else
{
throw new NucleusUserException("Query has " + joinPrimExpr.getId() + " yet the first component " + rootId + " is unknown!");
}
}
SQLTable tblMappingSqlTbl = null;
JavaTypeMapping tblIdMapping = null;
AbstractMemberMetaData tblMmd = null;
while (iter.hasNext())
{
String id = iter.next();
String[] ids = null;
if (id.contains("."))
{
ids = StringUtils.split(id, ".");
}
else
{
ids = new String[] {id};
}
for (int k=0;k();
}
explicitJoinPrimaryByAlias.put(joinAlias, joinPrimExpr.getId());
SQLTableMapping tblMapping = null;
if (tblMmd != null)
{
// Maps store the member so we can more easily navigate to the key/value
tblMapping = new SQLTableMapping(tblMappingSqlTbl, tblMmd, tblIdMapping);
}
else
{
tblMapping = new SQLTableMapping(tblMappingSqlTbl, cmd, tblIdMapping);
}
setSQLTableMappingForAlias(joinAlias, tblMapping);
}
DyadicExpression joinOnExpr = joinExpr.getOnExpression();
if (joinOnExpr != null)
{
// Convert the ON expression to a BooleanExpression and AND it to the most recent SQLTable at the end of this chain
joinOnExpr.evaluate(this);
BooleanExpression joinOnSqlExpr = (BooleanExpression) stack.pop();
SQLJoin join = stmt.getJoinForTable(sqlTbl);
join.addAndCondition(joinOnSqlExpr);
}
}
// Move on to next join in the chain
rightExpr = rightExpr.getRight();
}
}
/**
* Convenience method to convert a NewObjectExpression into a StatementNewObjectMapping.
* Handles recursive new object calls (where a new object is an arg to a new object construction).
* @param expr The NewObjectExpression
* @return The mapping for the new object
*/
protected StatementNewObjectMapping getStatementMappingForNewObjectExpression(NewObjectExpression expr)
{
List argExprs = expr.getConstructorArgExpressions();
StatementNewObjectMapping stmtMap = new StatementNewObjectMapping(expr.getNewClass());
if (argExprs != null)
{
Iterator argIter = argExprs.iterator();
int j = 0;
while (argIter.hasNext())
{
SQLExpression argExpr = argIter.next();
if (argExpr instanceof SQLLiteral)
{
stmtMap.addConstructorArgMapping(j, ((SQLLiteral)argExpr).getValue());
}
else if (argExpr instanceof NewObjectExpression)
{
stmtMap.addConstructorArgMapping(j,
getStatementMappingForNewObjectExpression((NewObjectExpression)argExpr));
}
else
{
StatementMappingIndex idx = new StatementMappingIndex(argExpr.getJavaTypeMapping());
int[] cols = stmt.select(argExpr, null);
idx.setColumnPositions(cols);
stmtMap.addConstructorArgMapping(j, idx);
}
j++;
}
}
return stmtMap;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processAndExpression(org.datanucleus.query.expression.Expression)
*/
protected Object processAndExpression(Expression expr)
{
SQLExpression rightExpr = stack.pop();
SQLExpression leftExpr = stack.pop();
if (!(rightExpr instanceof BooleanExpression))
{
throw new NucleusUserException("Query has clause " + rightExpr + " used with AND. This is illegal, and should be a boolean expression");
}
if (!(leftExpr instanceof BooleanExpression))
{
throw new NucleusUserException("Query has clause " + leftExpr + " used with AND. This is illegal, and should be a boolean expression");
}
BooleanExpression right = (BooleanExpression)rightExpr;
BooleanExpression left = (BooleanExpression)leftExpr;
if (left.getSQLStatement() != null && right.getSQLStatement() != null &&
left.getSQLStatement() != right.getSQLStatement())
{
if (left.getSQLStatement() == stmt &&
right.getSQLStatement().isChildStatementOf(stmt))
{
// Apply right to its sub-statement now and return left
right.getSQLStatement().whereAnd(right, true);
stack.push(left);
return left;
}
else if (right.getSQLStatement() == stmt &&
left.getSQLStatement().isChildStatementOf(stmt))
{
// Apply left to its sub-statement now and return right
left.getSQLStatement().whereAnd(left, true);
stack.push(right);
return right;
}
// TODO Cater for more situations
}
if (compileComponent == CompilationComponent.FILTER)
{
// Make sure any simple boolean field clauses are suitable
left = getBooleanExpressionForUseInFilter(left);
right = getBooleanExpressionForUseInFilter(right);
}
BooleanExpression opExpr = left.and(right);
stack.push(opExpr);
return opExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processOrExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processOrExpression(Expression expr)
{
SQLExpression rightExpr = stack.pop();
SQLExpression leftExpr = stack.pop();
if (!(rightExpr instanceof BooleanExpression))
{
throw new NucleusUserException("Query has clause " + rightExpr + " used with AND. This is illegal, and should be a boolean expression");
}
if (!(leftExpr instanceof BooleanExpression))
{
throw new NucleusUserException("Query has clause " + leftExpr + " used with AND. This is illegal, and should be a boolean expression");
}
BooleanExpression right = (BooleanExpression)rightExpr;
BooleanExpression left = (BooleanExpression)leftExpr;
if (left.getSQLStatement() != null && right.getSQLStatement() != null && left.getSQLStatement() != right.getSQLStatement())
{
if (left.getSQLStatement() == stmt && right.getSQLStatement().isChildStatementOf(stmt))
{
// Apply right to its sub-statement now and return left
right.getSQLStatement().whereAnd(right, true);
stack.push(left);
return left;
}
else if (right.getSQLStatement() == stmt && left.getSQLStatement().isChildStatementOf(stmt))
{
// Apply left to its sub-statement now and return right
left.getSQLStatement().whereAnd(left, true);
stack.push(right);
return right;
}
// TODO Cater for more situations
}
if (compileComponent == CompilationComponent.FILTER)
{
// Make sure any simple boolean field clauses are suitable
left = getBooleanExpressionForUseInFilter(left);
right = getBooleanExpressionForUseInFilter(right);
}
left.encloseInParentheses();
right.encloseInParentheses();
BooleanExpression opExpr = left.ior(right);
stack.push(opExpr);
return opExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processEqExpression(org.datanucleus.query.expression.Expression)
*/
protected Object processEqExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
if (left instanceof ParameterLiteral && !(right instanceof ParameterLiteral))
{
left = replaceParameterLiteral((ParameterLiteral)left, right.getJavaTypeMapping());
}
else if (right instanceof ParameterLiteral && !(left instanceof ParameterLiteral))
{
right = replaceParameterLiteral((ParameterLiteral)right, left.getJavaTypeMapping());
}
if (left.isParameter() && right.isParameter())
{
if (left.isParameter() && left instanceof SQLLiteral && ((SQLLiteral)left).getValue() != null)
{
// Change this parameter to a plain literal
useParameterExpressionAsLiteral((SQLLiteral)left);
}
if (right.isParameter() && right instanceof SQLLiteral && ((SQLLiteral)right).getValue() != null)
{
// Change this parameter to a plain literal
useParameterExpressionAsLiteral((SQLLiteral)right);
}
}
ExpressionUtils.checkAndCorrectExpressionMappingsForBooleanComparison(left, right);
if (left instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression) left);
left = stack.pop();
}
if (right instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression)right);
right = stack.pop();
}
// Logic for when one side is cross-joined (variable) and other side not, so transfer to a left outer join
if (!options.contains(OPTION_EXPLICIT_JOINS))
{
boolean leftIsCrossJoin = (stmt.getJoinTypeForTable(left.getSQLTable()) == org.datanucleus.store.rdbms.sql.SQLJoin.JoinType.CROSS_JOIN);
boolean rightIsCrossJoin = (stmt.getJoinTypeForTable(right.getSQLTable()) == org.datanucleus.store.rdbms.sql.SQLJoin.JoinType.CROSS_JOIN);
if (leftIsCrossJoin && !rightIsCrossJoin && !(right instanceof SQLLiteral))
{
// "a == b" and a is cross-joined currently (includes variable) so change to left outer join
String varName = getAliasForSQLTable(left.getSQLTable());
org.datanucleus.store.rdbms.sql.SQLJoin.JoinType joinType = getRequiredJoinTypeForAlias(varName);
if (joinType != null)
{
NucleusLogger.QUERY.debug("QueryToSQL.eq variable " + varName + " is mapped to table " + left.getSQLTable() +
" was previously bound as CROSS JOIN but changing to " + joinType);
String leftTblAlias = stmt.removeCrossJoin(left.getSQLTable());
if (joinType == org.datanucleus.store.rdbms.sql.SQLJoin.JoinType.LEFT_OUTER_JOIN)
{
stmt.leftOuterJoin(right.getSQLTable(), right.getJavaTypeMapping(),
left.getSQLTable().getTable(), leftTblAlias, left.getJavaTypeMapping(), null, left.getSQLTable().getGroupName());
}
else
{
stmt.innerJoin(right.getSQLTable(), right.getJavaTypeMapping(),
left.getSQLTable().getTable(), leftTblAlias, left.getJavaTypeMapping(), null, left.getSQLTable().getGroupName());
}
JavaTypeMapping m = exprFactory.getMappingForType(boolean.class, true);
SQLExpression opExpr = exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, true));
stack.push(opExpr);
return opExpr;
}
}
else if (!leftIsCrossJoin && rightIsCrossJoin && !(left instanceof SQLLiteral))
{
// "a == b" and b is cross-joined currently (includes variable) so change to left outer join
String varName = getAliasForSQLTable(right.getSQLTable());
org.datanucleus.store.rdbms.sql.SQLJoin.JoinType joinType = getRequiredJoinTypeForAlias(varName);
if (joinType != null)
{
NucleusLogger.QUERY.debug("QueryToSQL.eq variable " + varName + " is mapped to table " + right.getSQLTable() +
" was previously bound as CROSS JOIN but changing to " + joinType);
String rightTblAlias = stmt.removeCrossJoin(right.getSQLTable());
if (joinType == org.datanucleus.store.rdbms.sql.SQLJoin.JoinType.LEFT_OUTER_JOIN)
{
stmt.leftOuterJoin(left.getSQLTable(), left.getJavaTypeMapping(),
right.getSQLTable().getTable(), rightTblAlias, right.getJavaTypeMapping(), null, right.getSQLTable().getGroupName());
}
else
{
stmt.innerJoin(left.getSQLTable(), left.getJavaTypeMapping(),
right.getSQLTable().getTable(), rightTblAlias, right.getJavaTypeMapping(), null, right.getSQLTable().getGroupName());
}
JavaTypeMapping m = exprFactory.getMappingForType(boolean.class, true);
SQLExpression opExpr = exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, true));
stack.push(opExpr);
return opExpr;
}
}
}
BooleanExpression opExpr = left.eq(right);
stack.push(opExpr);
return opExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processNoteqExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processNoteqExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
if (left instanceof ParameterLiteral && !(right instanceof ParameterLiteral))
{
left = replaceParameterLiteral((ParameterLiteral)left, right.getJavaTypeMapping());
}
else if (right instanceof ParameterLiteral && !(left instanceof ParameterLiteral))
{
right = replaceParameterLiteral((ParameterLiteral)right, left.getJavaTypeMapping());
}
if (left.isParameter() && right.isParameter())
{
if (left.isParameter() && left instanceof SQLLiteral && ((SQLLiteral)left).getValue() != null)
{
useParameterExpressionAsLiteral((SQLLiteral)left);
}
if (right.isParameter() && right instanceof SQLLiteral && ((SQLLiteral)right).getValue() != null)
{
useParameterExpressionAsLiteral((SQLLiteral)right);
}
}
ExpressionUtils.checkAndCorrectExpressionMappingsForBooleanComparison(left, right);
if (left instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression) left);
left = stack.pop();
}
if (right instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression)right);
right = stack.pop();
}
BooleanExpression opExpr = left.ne(right);
stack.push(opExpr);
return opExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processGteqExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processGteqExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
if (left instanceof ParameterLiteral && !(right instanceof ParameterLiteral))
{
left = replaceParameterLiteral((ParameterLiteral)left, right.getJavaTypeMapping());
}
else if (right instanceof ParameterLiteral && !(left instanceof ParameterLiteral))
{
right = replaceParameterLiteral((ParameterLiteral)right, left.getJavaTypeMapping());
}
ExpressionUtils.checkAndCorrectExpressionMappingsForBooleanComparison(left, right);
if (left instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression) left);
left = stack.pop();
}
if (right instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression)right);
right = stack.pop();
}
BooleanExpression opExpr = left.ge(right);
stack.push(opExpr);
return opExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processGtExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processGtExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
if (left instanceof ParameterLiteral && !(right instanceof ParameterLiteral))
{
left = replaceParameterLiteral((ParameterLiteral)left, right.getJavaTypeMapping());
}
else if (right instanceof ParameterLiteral && !(left instanceof ParameterLiteral))
{
right = replaceParameterLiteral((ParameterLiteral)right, left.getJavaTypeMapping());
}
ExpressionUtils.checkAndCorrectExpressionMappingsForBooleanComparison(left, right);
if (left instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression) left);
left = stack.pop();
}
if (right instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression)right);
right = stack.pop();
}
BooleanExpression opExpr = left.gt(right);
stack.push(opExpr);
return opExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processLteqExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processLteqExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
if (left instanceof ParameterLiteral && !(right instanceof ParameterLiteral))
{
left = replaceParameterLiteral((ParameterLiteral)left, right.getJavaTypeMapping());
}
else if (right instanceof ParameterLiteral && !(left instanceof ParameterLiteral))
{
right = replaceParameterLiteral((ParameterLiteral)right, left.getJavaTypeMapping());
}
ExpressionUtils.checkAndCorrectExpressionMappingsForBooleanComparison(left, right);
if (left instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression) left);
left = stack.pop();
}
if (right instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression)right);
right = stack.pop();
}
BooleanExpression opExpr = left.le(right);
stack.push(opExpr);
return opExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processLtExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processLtExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
if (left instanceof ParameterLiteral && !(right instanceof ParameterLiteral))
{
left = replaceParameterLiteral((ParameterLiteral)left, right.getJavaTypeMapping());
}
else if (right instanceof ParameterLiteral && !(left instanceof ParameterLiteral))
{
right = replaceParameterLiteral((ParameterLiteral)right, left.getJavaTypeMapping());
}
ExpressionUtils.checkAndCorrectExpressionMappingsForBooleanComparison(left, right);
if (left instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression) left);
left = stack.pop();
}
if (right instanceof UnboundExpression)
{
processUnboundExpression((UnboundExpression)right);
right = stack.pop();
}
BooleanExpression opExpr = left.lt(right);
stack.push(opExpr);
return opExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processLiteral(org.datanucleus.query.expression.Literal)
*/
protected Object processLiteral(Literal expr)
{
Object litValue = expr.getLiteral();
if (litValue instanceof Class)
{
// Convert Class literals (instanceof) into StringLiteral
litValue = ((Class)litValue).getName();
}
else if (litValue instanceof String)
{
String litStr = (String)litValue;
if (litStr.startsWith("{d ") || litStr.startsWith("{t ") || litStr.startsWith("{ts "))
{
JavaTypeMapping m = exprFactory.getMappingForType(Date.class, false);
SQLExpression sqlExpr = exprFactory.newLiteral(stmt, m, litValue);
stack.push(sqlExpr);
return sqlExpr;
}
}
JavaTypeMapping m = (litValue != null) ? exprFactory.getMappingForType(litValue.getClass(), false) : null;
SQLExpression sqlExpr = exprFactory.newLiteral(stmt, m, litValue);
stack.push(sqlExpr);
return sqlExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processPrimaryExpression(org.datanucleus.query.expression.PrimaryExpression)
*/
protected Object processPrimaryExpression(PrimaryExpression expr)
{
SQLExpression sqlExpr = null;
if (expr.getLeft() != null)
{
if (expr.getLeft() instanceof DyadicExpression && expr.getLeft().getOperator() == Expression.OP_CAST)
{
String exprCastName = null;
if (expr.getLeft().getLeft() instanceof PrimaryExpression)
{
exprCastName = "CAST_" + ((PrimaryExpression)expr.getLeft().getLeft()).getId();
}
else if (expr.getLeft().getLeft() instanceof VariableExpression)
{
exprCastName = "CAST_" + ((VariableExpression)expr.getLeft().getLeft()).getId();
}
else if (expr.getLeft().getLeft() instanceof InvokeExpression)
{
exprCastName = "CAST_" + expr.getLeft().getLeft();
}
else
{
throw new NucleusException("Don't currently support cast of " + expr.getLeft().getLeft());
}
expr.getLeft().getLeft().evaluate(this);
sqlExpr = stack.pop();
JavaTypeMapping mapping = sqlExpr.getJavaTypeMapping();
if (mapping instanceof EmbeddedMapping)
{
// Cast of an embedded field, so use same table
// Extract what we are casting it to
Literal castLitExpr = (Literal)expr.getLeft().getRight();
Class castType = resolveClass((String)castLitExpr.getLiteral());
AbstractClassMetaData castCmd = ec.getMetaDataManager().getMetaDataForClass(castType, clr);
JavaTypeMapping discMapping = ((EmbeddedMapping)mapping).getDiscriminatorMapping();
if (discMapping != null)
{
// Should have a discriminator always when casting this
AbstractClassMetaData fieldCmd = ec.getMetaDataManager().getMetaDataForClass(castType, clr);
DiscriminatorMetaData dismd = fieldCmd.getDiscriminatorMetaDataRoot();
SQLExpression discExpr = stmt.getSQLExpressionFactory().newExpression(stmt, sqlExpr.getSQLTable(), discMapping);
SQLExpression discVal = null;
if (dismd.getStrategy() == DiscriminatorStrategy.CLASS_NAME)
{
discVal = stmt.getSQLExpressionFactory().newLiteral(stmt, discMapping, castCmd.getFullClassName());
}
else
{
discVal = stmt.getSQLExpressionFactory().newLiteral(stmt, discMapping, castCmd.getDiscriminatorMetaData().getValue());
}
BooleanExpression discRestrictExpr = discExpr.eq(discVal);
Iterator subclassIter = storeMgr.getSubClassesForClass(castType.getName(), true, clr).iterator();
while (subclassIter.hasNext())
{
String subclassName = subclassIter.next();
AbstractClassMetaData subtypeCmd =
storeMgr.getMetaDataManager().getMetaDataForClass(subclassName, clr);
if (dismd.getStrategy() == DiscriminatorStrategy.CLASS_NAME)
{
discVal = stmt.getSQLExpressionFactory().newLiteral(stmt, discMapping, subtypeCmd.getFullClassName());
}
else
{
discVal = stmt.getSQLExpressionFactory().newLiteral(stmt, discMapping, subtypeCmd.getDiscriminatorMetaData().getValue());
}
BooleanExpression subtypeExpr = discExpr.eq(discVal);
discRestrictExpr = discRestrictExpr.ior(subtypeExpr);
}
stmt.whereAnd(discRestrictExpr, true);
}
SQLTableMapping tblMapping = new SQLTableMapping(sqlExpr.getSQLTable(), castCmd, sqlExpr.getJavaTypeMapping());
setSQLTableMappingForAlias(exprCastName, tblMapping);
SQLTableMapping sqlMapping = getSQLTableMappingForPrimaryExpression(stmt, exprCastName, expr, Boolean.FALSE);
if (sqlMapping == null)
{
throw new NucleusException("PrimaryExpression " + expr + " is not yet supported");
}
sqlExpr = exprFactory.newExpression(stmt, sqlMapping.table, sqlMapping.mapping);
stack.push(sqlExpr);
return sqlExpr;
}
// Evaluate the cast
expr.getLeft().evaluate(this);
sqlExpr = stack.pop();
// Extract what we are casting it to
Literal castLitExpr = (Literal)expr.getLeft().getRight();
AbstractClassMetaData castCmd = ec.getMetaDataManager().getMetaDataForClass(resolveClass((String)castLitExpr.getLiteral()), clr);
SQLTableMapping tblMapping = new SQLTableMapping(sqlExpr.getSQLTable(), castCmd, sqlExpr.getJavaTypeMapping());
setSQLTableMappingForAlias(exprCastName, tblMapping);
SQLTableMapping sqlMapping = getSQLTableMappingForPrimaryExpression(stmt, exprCastName, expr, Boolean.FALSE);
if (sqlMapping == null)
{
throw new NucleusException("PrimaryExpression " + expr + " is not yet supported");
}
sqlExpr = exprFactory.newExpression(stmt, sqlMapping.table, sqlMapping.mapping);
stack.push(sqlExpr);
return sqlExpr;
}
else if (expr.getLeft() instanceof ParameterExpression)
{
// "{paramExpr}.field[.field[.field]]"
setNotPrecompilable(); // Need parameter values to process this
ParameterExpression paramExpr = (ParameterExpression)expr.getLeft();
Symbol paramSym = compilation.getSymbolTable().getSymbol(paramExpr.getId());
if (paramSym.getValueType() != null && paramSym.getValueType().isArray())
{
// Special case : array "methods" (particularly "length")
String first = expr.getTuples().get(0);
processParameterExpression(paramExpr, true);
SQLExpression paramSqlExpr = stack.pop();
sqlExpr = exprFactory.invokeMethod(stmt, "ARRAY", first, paramSqlExpr, null);
stack.push(sqlExpr);
return sqlExpr;
}
// Create Literal for the parameter (since we need to perform operations on it)
processParameterExpression(paramExpr, true);
SQLExpression paramSqlExpr = stack.pop();
SQLLiteral lit = (SQLLiteral)paramSqlExpr;
Object paramValue = lit.getValue();
List tuples = expr.getTuples();
Iterator tuplesIter = tuples.iterator();
Object objValue = paramValue;
while (tuplesIter.hasNext())
{
String fieldName = tuplesIter.next();
objValue = getValueForObjectField(objValue, fieldName);
setNotPrecompilable(); // Using literal value of parameter, so cannot precompile it
if (objValue == null)
{
break;
}
}
if (objValue == null)
{
sqlExpr = exprFactory.newLiteral(stmt, null, null);
stack.push(sqlExpr);
return sqlExpr;
}
JavaTypeMapping m = exprFactory.getMappingForType(objValue.getClass(), false);
sqlExpr = exprFactory.newLiteral(stmt, m, objValue);
stack.push(sqlExpr);
return sqlExpr;
}
else if (expr.getLeft() instanceof VariableExpression)
{
// "{varExpr}.field[.field[.field]]"
VariableExpression varExpr = (VariableExpression)expr.getLeft();
processVariableExpression(varExpr);
SQLExpression varSqlExpr = stack.pop();
if (varSqlExpr instanceof UnboundExpression)
{
// Bind as CROSS JOIN for now
processUnboundExpression((UnboundExpression)varSqlExpr);
varSqlExpr = stack.pop();
}
Class varType = clr.classForName(varSqlExpr.getJavaTypeMapping().getType());
if (varSqlExpr.getSQLStatement() == stmt.getParentStatement())
{
// Use parent mapper to get the mapping for this field since it has the table
SQLTableMapping sqlMapping = parentMapper.getSQLTableMappingForPrimaryExpression(stmt, null, expr, Boolean.FALSE);
if (sqlMapping == null)
{
throw new NucleusException("PrimaryExpression " + expr.getId() + " is not yet supported");
}
// TODO Cater for the table required to join to not being the primary table of the outer query
// This should check on
// getDatastoreAdapter().supportsOption(RDBMSAdapter.ACCESS_PARENTQUERY_IN_SUBQUERY))
sqlExpr = exprFactory.newExpression(varSqlExpr.getSQLStatement(), sqlMapping.table, sqlMapping.mapping);
stack.push(sqlExpr);
return sqlExpr;
}
SQLTableMapping varTblMapping = getSQLTableMappingForAlias(varExpr.getId());
if (varTblMapping == null)
{
throw new NucleusUserException("Variable " + varExpr.getId() + " is not yet bound, so cannot get field " + expr.getId());
}
if (varTblMapping.cmd == null)
{
throw new NucleusUserException("Variable " + varExpr.getId() + " of type " + varType.getName() + " cannot evaluate " + expr.getId());
}
SQLTableMapping sqlMapping = getSQLTableMappingForPrimaryExpression(varSqlExpr.getSQLStatement(), varExpr.getId(), expr, Boolean.FALSE);
sqlExpr = exprFactory.newExpression(sqlMapping.table.getSQLStatement(), sqlMapping.table, sqlMapping.mapping);
stack.push(sqlExpr);
return sqlExpr;
}
else if (expr.getLeft() instanceof InvokeExpression)
{
processInvokeExpression((InvokeExpression)expr.getLeft());
SQLExpression invokeSqlExpr = stack.pop();
Table tbl = invokeSqlExpr.getSQLTable().getTable();
if (expr.getTuples().size() > 1)
{
throw new NucleusUserException("Dont currently support evaluating " + expr.getId() + " on " + invokeSqlExpr);
}
if (tbl instanceof DatastoreClass)
{
// Table of a class, so assume to have field in the table of the class
// TODO Allow joins to superclasses if required
JavaTypeMapping mapping = ((DatastoreClass)tbl).getMemberMapping(expr.getId());
if (mapping == null)
{
throw new NucleusUserException("Dont currently support evaluating " + expr.getId() +
" on " + invokeSqlExpr + ". The field " + expr.getId() + " doesnt exist in table " + tbl);
}
sqlExpr = exprFactory.newExpression(stmt, invokeSqlExpr.getSQLTable(), mapping);
stack.push(sqlExpr);
return sqlExpr;
}
else if (tbl instanceof JoinTable)
{
if (invokeSqlExpr.getJavaTypeMapping() instanceof EmbeddedMapping)
{
// Table containing an embedded element/key/value so assume we have a column in the join table
EmbeddedMapping embMapping = (EmbeddedMapping)invokeSqlExpr.getJavaTypeMapping();
JavaTypeMapping mapping = embMapping.getJavaTypeMapping(expr.getId());
if (mapping == null)
{
throw new NucleusUserException("Dont currently support evaluating " + expr.getId() +
" on " + invokeSqlExpr + ". The field " + expr.getId() + " doesnt exist in table " + tbl);
}
sqlExpr = exprFactory.newExpression(stmt, invokeSqlExpr.getSQLTable(), mapping);
stack.push(sqlExpr);
return sqlExpr;
}
}
throw new NucleusUserException("Dont currently support evaluating " + expr.getId() + " on " + invokeSqlExpr + " with invoke having table of " + tbl);
}
else
{
throw new NucleusUserException("Dont currently support PrimaryExpression with 'left' of " + expr.getLeft());
}
}
// Real primary expression ("field.field", "alias.field.field" etc)
SQLTableMapping sqlMapping = getSQLTableMappingForPrimaryExpression(stmt, null, expr, null);
if (sqlMapping == null)
{
throw new NucleusException("PrimaryExpression " + expr.getId() + " is not yet supported");
}
sqlExpr = exprFactory.newExpression(stmt, sqlMapping.table, sqlMapping.mapping);
if (sqlMapping.mmd != null && sqlExpr instanceof MapExpression)
{
// This sqlMapping is for something joined in a FROM clause, so set the alias on the returned MapExpression to avoid doing the same joins
String alias = getAliasForSQLTableMapping(sqlMapping);
((MapExpression)sqlExpr).setAliasForMapTable(alias);
}
stack.push(sqlExpr);
return sqlExpr;
}
/**
* Method to take in a PrimaryExpression and return the SQLTable mapping info that it signifies.
* If the primary expression implies joining to other objects then adds the joins to the statement.
* Only adds joins if necessary; so if there is a further component after the required join, or if
* the "forceJoin" flag is set.
* @param theStmt SQLStatement to use when looking for tables etc
* @param exprName Name for an expression that this primary is relative to (optional)
* If not specified then the tuples are relative to the candidate.
* If specified then should have an entry in sqlTableByPrimary under this name.
* @param primExpr The primary expression
* @param forceJoin Whether to force a join if a relation member (or null if leaving to this method to decide)
* @return The SQL table mapping information for the specified primary
*/
private SQLTableMapping getSQLTableMappingForPrimaryExpression(SQLStatement theStmt, String exprName, PrimaryExpression primExpr, Boolean forceJoin)
{
if (forceJoin == null && primExpr.getParent() != null)
{
if (primExpr.getParent().getOperator() == Expression.OP_IS ||
primExpr.getParent().getOperator() == Expression.OP_ISNOT)
{
// "instanceOf" needs to be in the table of the primary expression
forceJoin = Boolean.TRUE;
}
}
SQLTableMapping sqlMapping = null;
List tuples = primExpr.getTuples();
// Find source object
Iterator iter = tuples.iterator();
String first = tuples.get(0);
String primaryName = null;
if (exprName != null)
{
// Primary relative to some object etc
sqlMapping = getSQLTableMappingForAlias(exprName);
primaryName = exprName;
}
else
{
if (hasSQLTableMappingForAlias(first))
{
// Start from a candidate (e.g JPQL alias)
sqlMapping = getSQLTableMappingForAlias(first);
primaryName = first;
iter.next(); // Skip first tuple
}
if (sqlMapping == null)
{
if (parentMapper != null && parentMapper.hasSQLTableMappingForAlias(first))
{
// Try parent query
sqlMapping = parentMapper.getSQLTableMappingForAlias(first);
primaryName = first;
iter.next(); // Skip first tuple
// This expression is for the parent statement so any joins need to go on that statement
theStmt = sqlMapping.table.getSQLStatement();
}
}
if (sqlMapping == null)
{
// Field of candidate, so use candidate
sqlMapping = getSQLTableMappingForAlias(candidateAlias);
primaryName = candidateAlias;
}
}
AbstractClassMetaData cmd = sqlMapping.cmd;
JavaTypeMapping mapping = sqlMapping.mapping;
while (iter.hasNext())
{
String component = iter.next();
primaryName += "." + component; // fully-qualified primary name
// Derive SQLTableMapping for this component
SQLTableMapping sqlMappingNew = getSQLTableMappingForAlias(primaryName);
if (sqlMappingNew == null)
{
// Table not present for this primary
AbstractMemberMetaData mmd = cmd.getMetaDataForMember(component);
if (mmd == null)
{
// Not valid member name
throw new NucleusUserException(Localiser.msg("021062", component, cmd.getFullClassName()));
}
else if (mmd.getPersistenceModifier() != FieldPersistenceModifier.PERSISTENT)
{
throw new NucleusUserException("Field "+ mmd.getFullFieldName() + " is not marked as persistent so cannot be queried");
}
// Find the table and the mapping for this field in the table
SQLTable sqlTbl = null;
if (mapping instanceof EmbeddedMapping)
{
// Embedded into the current table
sqlTbl = sqlMapping.table;
mapping = ((EmbeddedMapping)mapping).getJavaTypeMapping(component);
}
else
{
DatastoreClass table = storeMgr.getDatastoreClass(cmd.getFullClassName(), clr);
if (table == null)
{
AbstractClassMetaData[] subCmds = storeMgr.getClassesManagingTableForClass(cmd, clr);
if (subCmds.length == 1)
{
table = storeMgr.getDatastoreClass(subCmds[0].getFullClassName(), clr);
}
else
{
// TODO Support this situation - select of base class with no table of its own
// and multiple subclasses so primary statement is a UNION hence need to process
// all of UNIONs, and this primary expression refers to a mapping in each of subclass tables
throw new NucleusUserException("Unable to find table for primary " + primaryName +
" since the class " + cmd.getFullClassName() + " is managed in multiple tables");
}
}
mapping = table.getMemberMapping(mmd);
sqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(theStmt, sqlMapping.table, mapping);
}
RelationType relationType = mmd.getRelationType(clr);
if (relationType == RelationType.NONE)
{
sqlMappingNew = new SQLTableMapping(sqlTbl, cmd, mapping);
cmd = sqlMappingNew.cmd;
setSQLTableMappingForAlias(primaryName, sqlMappingNew);
}
else if (relationType == RelationType.ONE_TO_ONE_UNI || relationType == RelationType.ONE_TO_ONE_BI)
{
if (mmd.getMappedBy() != null)
{
// FK in other table so join to that first
AbstractMemberMetaData relMmd = mmd.getRelatedMemberMetaData(clr)[0];
if (relMmd.getAbstractClassMetaData().isEmbeddedOnly())
{
// Member is embedded, so keep same SQL table mapping
sqlMappingNew = sqlMapping;
cmd = relMmd.getAbstractClassMetaData();
}
else
{
// Member is in own table, so move to that SQL table mapping
DatastoreClass relTable = storeMgr.getDatastoreClass(mmd.getTypeName(), clr);
JavaTypeMapping relMapping = relTable.getMemberMapping(relMmd);
// Join to related table unless we already have the join in place
sqlTbl = theStmt.getTable(relTable, primaryName);
if (sqlTbl == null)
{
sqlTbl = SQLStatementHelper.addJoinForOneToOneRelation(theStmt,
sqlMapping.table.getTable().getIdMapping(), sqlMapping.table,
relMapping, relTable, null, null, primaryName, defaultJoinType);
}
if (iter.hasNext())
{
sqlMappingNew = new SQLTableMapping(sqlTbl, relMmd.getAbstractClassMetaData(), relTable.getIdMapping());
cmd = sqlMappingNew.cmd;
}
else
{
sqlMappingNew = new SQLTableMapping(sqlTbl, cmd, relTable.getIdMapping());
cmd = sqlMappingNew.cmd;
}
}
}
else
{
// FK is at this side, so only join if further component provided, or if forcing
if (forceJoin == null && !iter.hasNext())
{
if (primExpr.getParent() != null && primExpr.getParent().getOperator() == Expression.OP_CAST)
{
// Cast and not an interface field, so do a join to the table of the persistable object
if (mapping instanceof ReferenceMapping)
{
// Don't join with interface field since represents multiple implementations
// and the cast will be a restrict on which implementation to join to
}
else
{
AbstractClassMetaData relCmd = ec.getMetaDataManager().getMetaDataForClass(mmd.getType(), clr);
if (relCmd != null && !relCmd.isEmbeddedOnly())
{
DatastoreClass relTable = storeMgr.getDatastoreClass(relCmd.getFullClassName(), clr);
if (relTable == null)
{
}
else
{
forceJoin = Boolean.TRUE;
}
}
else
{
forceJoin = Boolean.TRUE;
}
}
}
}
if (iter.hasNext() || Boolean.TRUE.equals(forceJoin))
{
AbstractClassMetaData relCmd = null;
JavaTypeMapping relMapping = null;
DatastoreClass relTable = null;
if (relationType == RelationType.ONE_TO_ONE_BI)
{
AbstractMemberMetaData relMmd = mmd.getRelatedMemberMetaData(clr)[0];
relCmd = relMmd.getAbstractClassMetaData();
}
else
{
relCmd = ec.getMetaDataManager().getMetaDataForClass(mmd.getTypeName(), clr);
}
if (relCmd != null && relCmd.isEmbeddedOnly())
{
// Member is embedded so use same table but embedded mapping
sqlMappingNew = new SQLTableMapping(sqlTbl, relCmd, mapping);
cmd = relCmd;
}
else
{
// Member is in own table, so move to that SQL table mapping
relTable = storeMgr.getDatastoreClass(relCmd.getFullClassName(), clr);
if (relTable == null)
{
// No table for the related type (subclass-table), so see if this class has a single subclass with its own table
Collection relSubclassNames = storeMgr.getSubClassesForClass(relCmd.getFullClassName(), false, clr);
if (relSubclassNames != null && relSubclassNames.size() == 1)
{
String relSubclassName = relSubclassNames.iterator().next();
relTable = storeMgr.getDatastoreClass(relSubclassName, clr);
// TODO Cater for this having no table and next level yes etc
if (relTable != null)
{
relCmd = ec.getMetaDataManager().getMetaDataForClass(relSubclassName, clr);
}
}
if (relTable == null)
{
// No table as such, so likely using subclass-table at other side and we don't know where to join to
throw new NucleusUserException("Reference to PrimaryExpression " + primExpr + " yet this needs to join relation " + mmd.getFullFieldName() +
" and the other type has no table (subclass-table?). Maybe use a CAST to the appropriate subclass?");
}
}
relMapping = relTable.getIdMapping();
// Join to other table unless we already have the join in place
sqlTbl = theStmt.getTable(relTable, primaryName);
if (sqlTbl == null)
{
sqlTbl = SQLStatementHelper.addJoinForOneToOneRelation(theStmt, mapping,
sqlMapping.table, relMapping, relTable, null, null, primaryName, defaultJoinType);
}
sqlMappingNew = new SQLTableMapping(sqlTbl, relCmd, relMapping);
cmd = sqlMappingNew.cmd;
setSQLTableMappingForAlias(primaryName, sqlMappingNew);
}
}
else
{
sqlMappingNew = new SQLTableMapping(sqlTbl, cmd, mapping);
cmd = sqlMappingNew.cmd;
// Don't register the SQLTableMapping for this alias since only using FK
}
}
}
else if (relationType == RelationType.MANY_TO_ONE_BI)
{
AbstractMemberMetaData relMmd = mmd.getRelatedMemberMetaData(clr)[0];
DatastoreClass relTable = storeMgr.getDatastoreClass(mmd.getTypeName(), clr);
if (mmd.getJoinMetaData() != null || relMmd.getJoinMetaData() != null)
{
// Has join table so use that
sqlTbl = theStmt.getTable(relTable, primaryName);
if (sqlTbl == null)
{
// Join to the join table
CollectionTable joinTbl = (CollectionTable)storeMgr.getTable(relMmd);
if (defaultJoinType == org.datanucleus.store.rdbms.sql.SQLJoin.JoinType.INNER_JOIN)
{
SQLTable joinSqlTbl = theStmt.innerJoin(sqlMapping.table, sqlMapping.table.getTable().getIdMapping(),
joinTbl, null, joinTbl.getElementMapping(), null, null);
sqlTbl = theStmt.innerJoin(joinSqlTbl, joinTbl.getOwnerMapping(), relTable, null, relTable.getIdMapping(), null, primaryName);
}
else if (defaultJoinType == org.datanucleus.store.rdbms.sql.SQLJoin.JoinType.LEFT_OUTER_JOIN ||
defaultJoinType == null)
{
SQLTable joinSqlTbl = theStmt.leftOuterJoin(sqlMapping.table, sqlMapping.table.getTable().getIdMapping(),
joinTbl, null, joinTbl.getElementMapping(), null, null);
sqlTbl = theStmt.leftOuterJoin(joinSqlTbl, joinTbl.getOwnerMapping(), relTable, null, relTable.getIdMapping(), null, primaryName);
}
}
sqlMappingNew = new SQLTableMapping(sqlTbl, relMmd.getAbstractClassMetaData(), relTable.getIdMapping());
cmd = sqlMappingNew.cmd;
setSQLTableMappingForAlias(primaryName, sqlMappingNew);
}
else
{
// FK in this table
sqlTbl = theStmt.getTable(relTable, primaryName);
if (sqlTbl == null)
{
Operator op = (primExpr.getParent() != null ? primExpr.getParent().getOperator() : null);
if (!iter.hasNext() && (op == Expression.OP_EQ || op == Expression.OP_GT || op == Expression.OP_LT || op == Expression.OP_GTEQ ||
op == Expression.OP_LTEQ || op == Expression.OP_NOTEQ))
{
// Just return the FK mapping since in a "a.b == c.d" type expression and not needing
// to go further than the FK
sqlMappingNew = new SQLTableMapping(sqlMapping.table, relMmd.getAbstractClassMetaData(), mapping);
}
else
{
// Join to the related table
if (defaultJoinType == org.datanucleus.store.rdbms.sql.SQLJoin.JoinType.INNER_JOIN)
{
sqlTbl = theStmt.innerJoin(sqlMapping.table, mapping, relTable, null, relTable.getIdMapping(), null, primaryName);
}
else if (defaultJoinType == org.datanucleus.store.rdbms.sql.SQLJoin.JoinType.LEFT_OUTER_JOIN || defaultJoinType == null)
{
sqlTbl = theStmt.leftOuterJoin(sqlMapping.table, mapping, relTable, null, relTable.getIdMapping(), null, primaryName);
}
sqlMappingNew = new SQLTableMapping(sqlTbl, relMmd.getAbstractClassMetaData(), relTable.getIdMapping());
cmd = sqlMappingNew.cmd;
setSQLTableMappingForAlias(primaryName, sqlMappingNew);
}
}
else
{
sqlMappingNew = new SQLTableMapping(sqlTbl, relMmd.getAbstractClassMetaData(), relTable.getIdMapping());
cmd = sqlMappingNew.cmd;
setSQLTableMappingForAlias(primaryName, sqlMappingNew);
}
}
}
else if (RelationType.isRelationMultiValued(relationType))
{
// Can't reference further than a collection/map so just return its mapping here
sqlMappingNew = new SQLTableMapping(sqlTbl, cmd, mapping);
cmd = sqlMappingNew.cmd;
setSQLTableMappingForAlias(primaryName, sqlMappingNew);
}
}
else
{
cmd = sqlMappingNew.cmd;
}
sqlMapping = sqlMappingNew;
}
return sqlMapping;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processParameterExpression(org.datanucleus.query.expression.ParameterExpression)
*/
@Override
protected Object processParameterExpression(ParameterExpression expr)
{
return processParameterExpression(expr, false);
}
/**
* Method to process a parameter expression. The optional argument controls whether we should
* create this as a parameter or as a literal (i.e the param value is known etc).
* If the parameter doesn't have its value defined then returns ParameterLiteral
* otherwise we get an XXXLiteral of the (declared) type of the parameter
* @param expr The ParameterExpression
* @param asLiteral Whether to create a SQLLiteral rather than a parameter literal
* @return The processed expression
*/
protected Object processParameterExpression(ParameterExpression expr, boolean asLiteral)
{
if (compileComponent == CompilationComponent.ORDERING || compileComponent == CompilationComponent.RESULT)
{
// All JDBC drivers I know don't allow parameters in the order-by clause
// Note that we also don't allow parameters in result clause since SQLStatement squashes all SELECT expression to a String so losing info about params
asLiteral = true;
}
if (expr.getPosition() >= 0)
{
if (paramNameByPosition == null)
{
paramNameByPosition = new HashMap();
}
paramNameByPosition.put(Integer.valueOf(expr.getPosition()), expr.getId());
}
// Find the parameter value if supplied
Object paramValue = null;
boolean paramValueSet = false;
if (parameters != null && parameters.size() > 0)
{
// Check if the parameter has a value
if (parameters.containsKey(expr.getId()))
{
// Named parameter
paramValue = parameters.get(expr.getId());
paramValueSet = true;
}
else if (parameterValueByName != null && parameterValueByName.containsKey(expr.getId()))
{
// Positional parameter, but already encountered
paramValue = parameterValueByName.get(expr.getId());
paramValueSet = true;
}
else
{
// Positional parameter, not yet encountered
int position = positionalParamNumber;
if (positionalParamNumber < 0)
{
position = 0;
}
if (parameters.containsKey(Integer.valueOf(position)))
{
paramValue = parameters.get(Integer.valueOf(position));
paramValueSet = true;
positionalParamNumber = position+1;
if (parameterValueByName == null)
{
parameterValueByName = new HashMap();
}
parameterValueByName.put(expr.getId(), paramValue);
}
}
}
// Find the type to use for the parameter
JavaTypeMapping m = paramMappingForName.get(expr.getId());
if (m == null)
{
// Try to determine from provided parameter value or from symbol table (declared type)
if (paramValue != null)
{
String className = storeMgr.getClassNameForObjectID(paramValue, clr, ec);
if (className != null)
{
// Identity for persistable class
AbstractClassMetaData cmd = storeMgr.getMetaDataManager().getMetaDataForClass(className, clr);
if (cmd.getIdentityType() == IdentityType.APPLICATION)
{
Class cls = clr.classForName(className);
m = exprFactory.getMappingForType(cls, false);
m = new PersistableIdMapping((PersistableMapping) m);
}
}
if (m == null)
{
// Use the type of the input parameter value
try
{
m = exprFactory.getMappingForType(paramValue.getClass(), false);
}
catch (NucleusUserException nue)
{
// Maybe it needs a TypeConverter so try with the (declared) symbol type of this parameter
m = exprFactory.getMappingForType(expr.getSymbol().getValueType(), false);
}
}
if (expr.getSymbol() != null && expr.getSymbol().getValueType() != null)
{
if (!QueryUtils.queryParameterTypesAreCompatible(expr.getSymbol().getValueType(), paramValue.getClass()))
{
throw new QueryCompilerSyntaxException(Localiser.msg("021118", expr.getId(), expr.getSymbol().getValueType().getName(), paramValue.getClass().getName()));
}
if (expr.getSymbol().getValueType() != paramValue.getClass())
{
// Mark as not precompilable since the supplied type implies a subclass of the declared type
setNotPrecompilable();
}
}
}
else if (expr.getSymbol() != null && expr.getSymbol().getValueType() != null)
{
// Use the declared type of the parameter (explicit params)
m = exprFactory.getMappingForType(expr.getSymbol().getValueType(), false);
}
}
if (asLiteral && m != null && !m.representableAsStringLiteralInStatement())
{
// Must keep this as a parameter since its String form is no good in statements
asLiteral = false;
}
if (asLiteral)
{
// Parameter being represented as a literal (for whatever reason), so no longer precompilable
if (isPrecompilable())
{
NucleusLogger.QUERY.debug("Parameter " + expr + " is being resolved as a literal, so the query is no longer precompilable");
}
setNotPrecompilable();
}
else if (paramValue == null && expr.getSymbol() != null)
{
if (isPrecompilable())
{
NucleusLogger.QUERY.debug("Parameter " + expr + " is set to null so this has to be resolved as a NullLiteral, and the query is no longer precompilable");
}
setNotPrecompilable();
}
// Create the SQLExpression for this parameter, either as value-literal or as parameter-literal
SQLExpression sqlExpr = null;
boolean nullParamValueUsesIsNull = options.contains(OPTION_NULL_PARAM_USE_IS_NULL);
if (paramValueSet && paramValue == null && nullParamValueUsesIsNull)
{
// Value is set to null, but we enforce a NullLiteral for the case of null comparisons e.g we don't want "field = ?", but instead "field IS NULL"
sqlExpr = exprFactory.newLiteral(stmt, null, null);
}
else if (asLiteral)
{
// Create a value-literal as requested
sqlExpr = exprFactory.newLiteral(stmt, m, paramValue);
}
else
{
// Create a parameter-literal with it tied to the parameter name for later replacement in the statement
sqlExpr = exprFactory.newLiteralParameter(stmt, m, paramValue, expr.getId());
if (sqlExpr instanceof ParameterLiteral)
{
((ParameterLiteral)sqlExpr).setName(expr.getId());
}
if (expressionForParameter == null)
{
expressionForParameter = new HashMap();
}
expressionForParameter.put(expr.getId(), sqlExpr);
paramMappingForName.put(expr.getId(), m);
}
stack.push(sqlExpr);
return sqlExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processInvokeExpression(org.datanucleus.query.expression.InvokeExpression)
*/
protected Object processInvokeExpression(InvokeExpression expr)
{
String operation = expr.getOperation();
// Find object that we invoke on
Expression invokedExpr = expr.getLeft();
SQLExpression invokedSqlExpr = null;
if (invokedExpr == null)
{
// Static method
}
else if (invokedExpr instanceof PrimaryExpression)
{
processPrimaryExpression((PrimaryExpression)invokedExpr);
invokedSqlExpr = stack.pop();
}
else if (invokedExpr instanceof Literal)
{
processLiteral((Literal)invokedExpr);
invokedSqlExpr = stack.pop();
}
else if (invokedExpr instanceof ParameterExpression)
{
// TODO May be needed to set the second parameter to "false" here and then if the method
// being invoked needs the parameters as a normal SQLLiteral then allow it to convert it itself
processParameterExpression((ParameterExpression)invokedExpr, true);
invokedSqlExpr = stack.pop();
}
else if (invokedExpr instanceof InvokeExpression)
{
processInvokeExpression((InvokeExpression)invokedExpr);
invokedSqlExpr = stack.pop();
}
else if (invokedExpr instanceof VariableExpression)
{
processVariableExpression((VariableExpression)invokedExpr);
invokedSqlExpr = stack.pop();
}
else if (invokedExpr instanceof ArrayExpression)
{
ArrayExpression arrExpr = (ArrayExpression)invokedExpr;
SQLExpression[] arrSqlExprs = new SQLExpression[arrExpr.getArraySize()];
for (int i=0;i();
Iterator iter = args.iterator();
while (iter.hasNext())
{
Expression argExpr = iter.next();
if (argExpr instanceof PrimaryExpression)
{
processPrimaryExpression((PrimaryExpression)argExpr);
SQLExpression argSqlExpr = stack.pop();
if (compileComponent == CompilationComponent.RESULT && operation.equalsIgnoreCase("count") && stmt.getNumberOfTableGroups() > 1)
{
if (argSqlExpr.getSQLTable() == stmt.getPrimaryTable() && argSqlExpr.getJavaTypeMapping() == stmt.getPrimaryTable().getTable().getIdMapping())
{
// Result with "count(this)" and joins to other groups, so enforce distinct
argSqlExpr.distinct();
}
}
sqlExprArgs.add(argSqlExpr);
}
else if (argExpr instanceof ParameterExpression)
{
processParameterExpression((ParameterExpression)argExpr);
sqlExprArgs.add(stack.pop());
}
else if (argExpr instanceof InvokeExpression)
{
processInvokeExpression((InvokeExpression)argExpr);
sqlExprArgs.add(stack.pop());
}
else if (argExpr instanceof Literal)
{
processLiteral((Literal)argExpr);
sqlExprArgs.add(stack.pop());
}
else if (argExpr instanceof DyadicExpression)
{
// Evaluate using this evaluator
argExpr.evaluate(this);
sqlExprArgs.add(stack.pop());
}
else if (argExpr instanceof VariableExpression)
{
processVariableExpression((VariableExpression)argExpr);
sqlExprArgs.add(stack.pop());
}
else if (argExpr instanceof CaseExpression)
{
processCaseExpression((CaseExpression)argExpr);
sqlExprArgs.add(stack.pop());
}
else
{
throw new NucleusException("Dont currently support invoke expression argument " + argExpr);
}
}
if (expr.getOperation() != null && expr.getOperation().equals("INDEX"))
{
// Special case of index expression
List indexArgs = expr.getArguments();
if (indexArgs == null || indexArgs.size() > 1)
{
throw new NucleusException("Can only use INDEX with single argument");
}
PrimaryExpression indexExpr = (PrimaryExpression)indexArgs.get(0);
String joinAlias = indexExpr.getId();
String collExprName = joinAlias;
if (explicitJoinPrimaryByAlias != null)
{
collExprName = explicitJoinPrimaryByAlias.get(joinAlias);
if (collExprName == null)
{
throw new NucleusException("Unable to locate primary expression for alias " + joinAlias);
}
}
// Find an expression for the collection field
List tuples = new ArrayList();
StringTokenizer primTokenizer = new StringTokenizer(collExprName, ".");
while (primTokenizer.hasMoreTokens())
{
String token = primTokenizer.nextToken();
tuples.add(token);
}
PrimaryExpression collPrimExpr = new PrimaryExpression(tuples);
processPrimaryExpression(collPrimExpr);
SQLExpression collSqlExpr = stack.pop();
sqlExprArgs.add(collSqlExpr);
}
}
// Invoke the method
SQLExpression sqlExpr = null;
if (invokedSqlExpr != null)
{
sqlExpr = invokedSqlExpr.invoke(operation, sqlExprArgs);
}
else
{
sqlExpr = exprFactory.invokeMethod(stmt, null, operation, null, sqlExprArgs);
}
stack.push(sqlExpr);
return sqlExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processSubqueryExpression(org.datanucleus.query.expression.SubqueryExpression)
*/
@Override
protected Object processSubqueryExpression(SubqueryExpression expr)
{
String keyword = expr.getKeyword();
Expression subqueryExpr = expr.getRight();
if (subqueryExpr instanceof VariableExpression)
{
processVariableExpression((VariableExpression)subqueryExpr);
SQLExpression subquerySqlExpr = stack.pop();
if (keyword != null && keyword.equals("EXISTS"))
{
// EXISTS expressions need to be Boolean
if (subquerySqlExpr instanceof org.datanucleus.store.rdbms.sql.expression.SubqueryExpression)
{
SQLStatement subStmt = ((org.datanucleus.store.rdbms.sql.expression.SubqueryExpression)subquerySqlExpr).getSubqueryStatement();
subquerySqlExpr = new BooleanSubqueryExpression(stmt, keyword, subStmt);
}
else
{
SQLStatement subStmt = ((SubqueryExpressionComponent)subquerySqlExpr).getSubqueryStatement();
subquerySqlExpr = new BooleanSubqueryExpression(stmt, keyword, subStmt);
}
}
else if (subquerySqlExpr instanceof org.datanucleus.store.rdbms.sql.expression.SubqueryExpression)
{
SQLStatement subStmt = ((org.datanucleus.store.rdbms.sql.expression.SubqueryExpression)subquerySqlExpr).getSubqueryStatement();
subquerySqlExpr = new BooleanSubqueryExpression(stmt, keyword, subStmt);
}
else if (subquerySqlExpr instanceof NumericSubqueryExpression)
{
// Apply keyword (e.g ALL, SOME, ANY) to numeric expressions
((NumericSubqueryExpression)subquerySqlExpr).setKeyword(keyword);
}
stack.push(subquerySqlExpr);
return subquerySqlExpr;
}
throw new NucleusException("Dont currently support SubqueryExpression " + keyword + " for type " + subqueryExpr);
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processAddExpression(org.datanucleus.query.expression.Expression)
*/
protected Object processAddExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
if (left instanceof ParameterLiteral && !(right instanceof ParameterLiteral))
{
left = replaceParameterLiteral((ParameterLiteral)left, right.getJavaTypeMapping());
}
else if (right instanceof ParameterLiteral && !(left instanceof ParameterLiteral))
{
right = replaceParameterLiteral((ParameterLiteral)right, left.getJavaTypeMapping());
}
SQLExpression resultExpr = left.add(right);
stack.push(resultExpr);
return resultExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processDivExpression(org.datanucleus.query.expression.Expression)
*/
protected Object processDivExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
SQLExpression resultExpr = left.div(right);
stack.push(resultExpr);
return resultExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processMulExpression(org.datanucleus.query.expression.Expression)
*/
protected Object processMulExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
SQLExpression resultExpr = left.mul(right);
stack.push(resultExpr);
return resultExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processSubExpression(org.datanucleus.query.expression.Expression)
*/
protected Object processSubExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
if (left instanceof ParameterLiteral && !(right instanceof ParameterLiteral))
{
left = replaceParameterLiteral((ParameterLiteral)left, right.getJavaTypeMapping());
}
else if (right instanceof ParameterLiteral && !(left instanceof ParameterLiteral))
{
right = replaceParameterLiteral((ParameterLiteral)right, left.getJavaTypeMapping());
}
SQLExpression resultExpr = left.sub(right);
stack.push(resultExpr);
return resultExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processDistinctExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processDistinctExpression(Expression expr)
{
SQLExpression sqlExpr = stack.pop();
sqlExpr.distinct();
stack.push(sqlExpr);
return sqlExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processComExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processComExpression(Expression expr)
{
// Bitwise complement - only for integer values
SQLExpression sqlExpr = stack.pop();
SQLExpression resultExpr = sqlExpr.com();
stack.push(resultExpr);
return resultExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processModExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processModExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
SQLExpression resultExpr = left.mod(right);
stack.push(resultExpr);
return resultExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processNegExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processNegExpression(Expression expr)
{
SQLExpression sqlExpr = stack.pop();
SQLExpression resultExpr = sqlExpr.neg();
stack.push(resultExpr);
return resultExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processNotExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processNotExpression(Expression expr)
{
// Logical complement - only for boolean values
SQLExpression sqlExpr = stack.pop();
SQLExpression resultExpr = sqlExpr.not();
stack.push(resultExpr);
return resultExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processCastExpression(org.datanucleus.query.expression.CastExpression)
*/
@Override
protected Object processCastExpression(Expression expr)
{
SQLExpression right = stack.pop(); // The cast literal
SQLExpression left = stack.pop(); // The expression to cast
SQLExpression castExpr = left.cast(right);
stack.push(castExpr);
return castExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processCaseExpression(org.datanucleus.query.expression.CaseExpression)
*/
@Override
protected Object processCaseExpression(CaseExpression expr)
{
boolean numericCase = false;
boolean booleanCase = false;
List conditions = expr.getConditions();
Iterator whenExprIter = conditions.iterator();
SQLExpression[] whenSqlExprs = new SQLExpression[conditions.size()];
SQLExpression[] actionSqlExprs = new SQLExpression[conditions.size()];
int i = 0;
while (whenExprIter.hasNext())
{
ExpressionPair pair = whenExprIter.next();
Expression whenExpr = pair.getWhenExpression();
whenExpr.evaluate(this);
whenSqlExprs[i] = stack.pop();
if (!(whenSqlExprs[i] instanceof BooleanExpression))
{
throw new QueryCompilerSyntaxException("IF/ELSE conditional expression should return boolean but doesn't : " + expr);
}
Expression actionExpr = pair.getActionExpression();
actionExpr.evaluate(this);
actionSqlExprs[i] = stack.pop();
if (actionSqlExprs[i] instanceof NumericExpression)
{
numericCase = true;
}
else if (actionSqlExprs[i] instanceof BooleanExpression)
{
booleanCase = true;
}
i++;
}
Expression elseExpr = expr.getElseExpression();
elseExpr.evaluate(this);
SQLExpression elseActionSqlExpr = stack.pop();
// Check that all action sql expressions are consistent
for (int j=1;j ctrArgExprs = null;
List args = expr.getArguments();
if (args != null)
{
Class[] ctrArgTypes = new Class[args.size()];
ctrArgExprs = new ArrayList(args.size());
Iterator iter = args.iterator();
int i = 0;
while (iter.hasNext())
{
Expression argExpr = (Expression)iter.next();
SQLExpression sqlExpr = (SQLExpression)evaluate(argExpr);
ctrArgExprs.add(sqlExpr);
if (sqlExpr instanceof NewObjectExpression)
{
ctrArgTypes[i] = ((NewObjectExpression)sqlExpr).getNewClass();
}
else if (sqlExpr.getJavaTypeMapping() instanceof DatastoreIdMapping || sqlExpr.getJavaTypeMapping() instanceof PersistableMapping)
{
ctrArgTypes[i] = clr.classForName(sqlExpr.getJavaTypeMapping().getType());
}
else
{
ctrArgTypes[i] = sqlExpr.getJavaTypeMapping().getJavaType();
}
i++;
}
// Check that this class has the required constructor
Constructor ctr = ClassUtils.getConstructorWithArguments(cls, ctrArgTypes);
if (ctr == null)
{
throw new NucleusUserException(Localiser.msg("021033", className, StringUtils.objectArrayToString(ctrArgTypes)));
}
}
NewObjectExpression newExpr = new NewObjectExpression(stmt, cls, ctrArgExprs);
stack.push(newExpr);
return newExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processLikeExpression(org.datanucleus.query.expression.Expression)
*/
@Override
protected Object processLikeExpression(Expression expr)
{
SQLExpression right = stack.pop();
SQLExpression left = stack.pop();
List args = new ArrayList();
args.add(right);
SQLExpression likeExpr = exprFactory.invokeMethod(stmt, String.class.getName(), "like", left, args);
stack.push(likeExpr);
return likeExpr;
}
/* (non-Javadoc)
* @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processVariableExpression(org.datanucleus.query.expression.VariableExpression)
*/
@Override
protected Object processVariableExpression(VariableExpression expr)
{
String varName = expr.getId();
Symbol varSym = expr.getSymbol();
if (varSym != null)
{
// Use name from symbol if possible
varName = varSym.getQualifiedName();
}
if (hasSQLTableMappingForAlias(varName))
{
// Variable already found
SQLTableMapping tblMapping = getSQLTableMappingForAlias(varName);
SQLExpression sqlExpr = exprFactory.newExpression(tblMapping.table.getSQLStatement(), tblMapping.table, tblMapping.mapping);
stack.push(sqlExpr);
return sqlExpr;
}
else if (compilation.getCompilationForSubquery(varName) != null)
{
// Subquery variable
QueryCompilation subCompilation = compilation.getCompilationForSubquery(varName);
AbstractClassMetaData subCmd = ec.getMetaDataManager().getMetaDataForClass(subCompilation.getCandidateClass(), ec.getClassLoaderResolver());
// Create subquery statement, using any provided alias if possible
String subAlias = null;
if (subCompilation.getCandidateAlias() != null && !subCompilation.getCandidateAlias().equals(candidateAlias))
{
subAlias = subCompilation.getCandidateAlias();
}
StatementResultMapping subqueryResultMapping = new StatementResultMapping();
// TODO Fix "avg(something)" arg - not essential but is a hack right now
SQLStatement subStmt = RDBMSQueryUtils.getStatementForCandidates(storeMgr, stmt, subCmd, null, ec, subCompilation.getCandidateClass(), true, "avg(something)", subAlias, null);
QueryToSQLMapper sqlMapper = new QueryToSQLMapper(subStmt, subCompilation, parameters, null, subqueryResultMapping, subCmd, true, fetchPlan, ec, importsDefinition, options,
extensionsByName);
sqlMapper.setParentMapper(this);
sqlMapper.compile();
if (subqueryResultMapping.getNumberOfResultExpressions() > 1)
{
throw new NucleusUserException("Number of result expressions in subquery should be 1");
}
SQLExpression subExpr = null;
// TODO Cater for subquery select of its own candidate
if (subqueryResultMapping.getNumberOfResultExpressions() == 0)
{
subExpr = new org.datanucleus.store.rdbms.sql.expression.SubqueryExpression(stmt, subStmt);
}
else
{
JavaTypeMapping subMapping = ((StatementMappingIndex)subqueryResultMapping.getMappingForResultExpression(0)).getMapping();
if (subMapping instanceof TemporalMapping)
{
subExpr = new TemporalSubqueryExpression(stmt, subStmt);
}
else if (subMapping instanceof StringMapping)
{
subExpr = new StringSubqueryExpression(stmt, subStmt);
}
else
{
subExpr = new NumericSubqueryExpression(stmt, subStmt);
}
if (subExpr.getJavaTypeMapping() == null)
{
subExpr.setJavaTypeMapping(subMapping);
}
}
stack.push(subExpr);
return subExpr;
}
else if (stmt.getParentStatement() != null && parentMapper != null &&
parentMapper.candidateAlias != null && parentMapper.candidateAlias.equals(varName))
{
// Variable in subquery linking back to parent query
SQLExpression varExpr = exprFactory.newExpression(stmt.getParentStatement(), stmt.getParentStatement().getPrimaryTable(),
stmt.getParentStatement().getPrimaryTable().getTable().getIdMapping());
stack.push(varExpr);
return varExpr;
}
else
{
// Variable never met before, so return as UnboundExpression - process later if needing binding
NucleusLogger.QUERY.debug("QueryToSQL.processVariable (unbound) variable=" + varName + " is not yet bound so returning UnboundExpression");
UnboundExpression unbExpr = new UnboundExpression(stmt, varName);
stack.push(unbExpr);
return unbExpr;
}
}
protected SQLExpression processUnboundExpression(UnboundExpression expr)
{
String varName = expr.getVariableName();
Symbol varSym = compilation.getSymbolTable().getSymbol(varName);
SQLExpression sqlExpr = bindVariable(expr, varSym.getValueType());
if (sqlExpr != null)
{
stack.push(sqlExpr);
return sqlExpr;
}
throw new NucleusUserException("Variable '" + varName + "' is unbound and cannot be determined (is it a misspelled field name? or is not intended to be a variable?)");
}
/**
* Convenience method to return a parameter-based literal using the supplied mapping to replace
* the provided ParameterLiteral (generated before its type was known).
* @param paramLit The parameter literal
* @param mapping Mapping to use
* @return The replacement expression
*/
protected SQLExpression replaceParameterLiteral(ParameterLiteral paramLit, JavaTypeMapping mapping)
{
return exprFactory.newLiteralParameter(stmt, mapping, paramLit.getValue(), paramLit.getParameterName());
}
/* (non-Javadoc)
* @see org.datanucleus.store.rdbms.query.QueryGenerator#useParameterExpressionAsLiteral(org.datanucleus.store.rdbms.sql.expression.SQLLiteral)
*/
public void useParameterExpressionAsLiteral(SQLLiteral paramLiteral)
{
paramLiteral.setNotParameter();
setNotPrecompilable();
}
public boolean hasExtension(String key)
{
return (extensionsByName == null ? false : extensionsByName.containsKey(key));
}
public Object getValueForExtension(String key)
{
return (extensionsByName == null ? null : extensionsByName.get(key));
}
/**
* Convenience method to return the required join type for the specified alias.
* If the table has a join type defined as an extension "datanucleus.query.jdoql.{alias}.join"
* then this returns the type. Otherwise returns null.
* @param alias The alias
* @return The join type required (if any)
*/
public org.datanucleus.store.rdbms.sql.SQLJoin.JoinType getRequiredJoinTypeForAlias(String alias)
{
if (alias == null)
{
return null;
}
else if (alias.equals(candidateAlias))
{
return null;
}
String extensionName = "datanucleus.query.jdoql." + alias + ".join";
org.datanucleus.store.rdbms.sql.SQLJoin.JoinType joinType = null;
if (hasExtension(extensionName))
{
String joinValue = (String)getValueForExtension(extensionName);
if (joinValue.equalsIgnoreCase("INNERJOIN"))
{
joinType = org.datanucleus.store.rdbms.sql.SQLJoin.JoinType.INNER_JOIN;
}
else if (joinValue.equalsIgnoreCase("LEFTOUTERJOIN"))
{
joinType = org.datanucleus.store.rdbms.sql.SQLJoin.JoinType.LEFT_OUTER_JOIN;
}
}
return joinType;
}
/**
* Convenience method to return the value of a field of the supplied object.
* If the object is null then returns null for the field.
* @param obj The object
* @param fieldName The field name
* @return The field value
*/
protected Object getValueForObjectField(Object obj, String fieldName)
{
if (obj != null)
{
Object paramFieldValue = null;
if (ec.getApiAdapter().isPersistable(obj))
{
ObjectProvider paramSM = ec.findObjectProvider(obj);
AbstractClassMetaData paramCmd = ec.getMetaDataManager().getMetaDataForClass(obj.getClass(), clr);
AbstractMemberMetaData paramFieldMmd = paramCmd.getMetaDataForMember(fieldName);
if (paramSM != null)
{
paramSM.isLoaded(paramFieldMmd.getAbsoluteFieldNumber());
paramFieldValue = paramSM.provideField(paramFieldMmd.getAbsoluteFieldNumber());
}
else
{
paramFieldValue = ClassUtils.getValueOfFieldByReflection(obj, fieldName);
}
}
else
{
paramFieldValue = ClassUtils.getValueOfFieldByReflection(obj, fieldName);
}
return paramFieldValue;
}
return null;
}
protected SQLTableMapping getSQLTableMappingForAlias(String alias)
{
if (alias == null)
{
return null;
}
if (options.contains(OPTION_CASE_INSENSITIVE))
{
return sqlTableByPrimary.get(alias.toUpperCase());
}
return sqlTableByPrimary.get(alias);
}
public String getAliasForSQLTableMapping(SQLTableMapping tblMapping)
{
Iterator> iter = sqlTableByPrimary.entrySet().iterator();
while (iter.hasNext())
{
Map.Entry entry = iter.next();
if (entry.getValue() == tblMapping)
{
return entry.getKey();
}
}
return null;
}
/**
* Returns the alias used for the specified SQLTable.
* If we have a variable "var1" and there is an access to a field also, then we may have entries
* for "var1" and "var1.field". In this case we return the shortest.
* @param tbl The table
* @return The query name alias for this table
*/
public String getAliasForSQLTable(SQLTable tbl)
{
Iterator> iter = sqlTableByPrimary.entrySet().iterator();
String alias = null;
while (iter.hasNext())
{
Map.Entry entry = iter.next();
if (entry.getValue().table == tbl)
{
// Take the shortest alias (since we could have "var", "var.field1" etc)
if (alias == null)
{
alias = entry.getKey();
}
else
{
if (entry.getKey().length() < alias.length())
{
alias = entry.getKey();
}
}
}
}
return alias;
}
protected void setSQLTableMappingForAlias(String alias, SQLTableMapping mapping)
{
if (alias == null)
{
return;
}
if (options.contains(OPTION_CASE_INSENSITIVE))
{
sqlTableByPrimary.put(alias.toUpperCase(), mapping);
}
else
{
sqlTableByPrimary.put(alias, mapping);
}
}
protected boolean hasSQLTableMappingForAlias(String alias)
{
if (options.contains(OPTION_CASE_INSENSITIVE))
{
return sqlTableByPrimary.containsKey(alias.toUpperCase());
}
return sqlTableByPrimary.containsKey(alias);
}
/**
* Method to bind the specified variable to the table and mapping.
* @param varName Variable name
* @param cmd Metadata for this variable type
* @param sqlTbl Table for this variable
* @param mapping The mapping of this variable in the table
*/
public void bindVariable(String varName, AbstractClassMetaData cmd, SQLTable sqlTbl, JavaTypeMapping mapping)
{
SQLTableMapping m = getSQLTableMappingForAlias(varName);
if (m != null)
{
throw new NucleusException("Variable " + varName + " is already bound to " + m.table + " yet attempting to bind to " + sqlTbl);
}
NucleusLogger.QUERY.debug("QueryToSQL.bindVariable variable " + varName + " being bound to table=" + sqlTbl + " mapping=" + mapping);
m = new SQLTableMapping(sqlTbl, cmd, mapping);
setSQLTableMappingForAlias(varName, m);
}
/**
* Method to bind the specified unbound variable (as cross join) on the assumption that the type
* is a persistable class.
* @param expr Unbound expression
* @param type The type to bind as
*/
public SQLExpression bindVariable(UnboundExpression expr, Class type)
{
String varName = expr.getVariableName();
Symbol varSym = compilation.getSymbolTable().getSymbol(varName);
if (varSym.getValueType() == null)
{
varSym.setValueType(type);
}
AbstractClassMetaData cmd = ec.getMetaDataManager().getMetaDataForClass(type, clr);
if (cmd != null)
{
// Variable is persistent type, so add cross join (may need changing later on in compilation)
DatastoreClass varTable = storeMgr.getDatastoreClass(varSym.getValueType().getName(), clr);
SQLTable varSqlTbl = stmt.crossJoin(varTable, "VAR_" + varName, null);
SQLTableMapping varSqlTblMapping = new SQLTableMapping(varSqlTbl, cmd, varTable.getIdMapping());
setSQLTableMappingForAlias(varName, varSqlTblMapping);
return exprFactory.newExpression(stmt, varSqlTbl, varTable.getIdMapping());
}
return null;
}
/**
* Method to bind the specified parameter to the defined type.
* If the parameter is already bound (declared in the query perhaps, or bound via an earlier usage) then
* does nothing.
* @param paramName Name of the parameter
* @param type The type (or subclass)
*/
public void bindParameter(String paramName, Class type)
{
Symbol paramSym = compilation.getSymbolTable().getSymbol(paramName);
if (paramSym != null && paramSym.getValueType() == null)
{
paramSym.setValueType(type);
}
}
/**
* Accessor for the type of a variable if already known (declared?).
* @param varName Name of the variable
* @return The type if it is known
*/
public Class getTypeOfVariable(String varName)
{
Symbol sym = compilation.getSymbolTable().getSymbol(varName);
if (sym != null && sym.getValueType() != null)
{
return sym.getValueType();
}
return null;
}
/**
* Accessor for whether the query has explicit variables.
* If not then has implicit variables, meaning that they could potentially be rebound later
* if prematurely bound in a particular way.
* @return Whether the query has explicit variables
*/
public boolean hasExplicitJoins()
{
return options.contains(OPTION_EXPLICIT_JOINS);
}
/**
* Convenience method to return a boolean expression suitable for using in a filter.
* Will return the input expression unless it is simply a reference to a field of a class
* such as in a filter clause like myBoolField
. In that case we return a boolean
* like myBoolField == TRUE
.
* @param expr The expression to check
* @return The expression valid for use in the filter
*/
protected BooleanExpression getBooleanExpressionForUseInFilter(BooleanExpression expr)
{
if (compileComponent != CompilationComponent.FILTER)
{
return expr;
}
if (!expr.hasClosure())
{
// Add closure to the boolean expression
return new BooleanExpression(expr, Expression.OP_EQ, new BooleanLiteral(stmt, expr.getJavaTypeMapping(), Boolean.TRUE, null));
}
return expr;
}
/**
* Convenience method to resolve a class name.
* @param className The class name
* @return The class it relates to (if found)
*/
public Class resolveClass(String className)
{
Class cls = null;
try
{
cls = clr.classForName(className);
}
catch (ClassNotResolvedException cnre)
{
if (importsDefinition != null)
{
cls = importsDefinition.resolveClassDeclaration(className, clr, null);
}
}
if (cls == null && compilation.getQueryLanguage().equalsIgnoreCase("JPQL"))
{
// JPQL also allows use of EntityName in queries
AbstractClassMetaData cmd = ec.getMetaDataManager().getMetaDataForEntityName(className);
if (cmd != null)
{
return clr.classForName(cmd.getFullClassName());
}
}
return cls;
}
}