org.efaps.db.AbstractQuery Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of efaps-kernel Show documentation
Show all versions of efaps-kernel Show documentation
eFaps is a framework used to map objects with or without attached files to
a relational database and optional file systems (only for attaches files). Configurable access control can be provided down to object and attribute level depending on implementation and use case. Depending on requirements, events (like triggers) allow to implement business logic and to separate business logic from user interface.
The framework includes integrations (e.g. webdav, full text search) and a web application as 'simple' configurable user interface. Some best practises, example web application modules (e.g. team work module) support administrators and implementers using this framework.
/*
* Copyright 2003 - 2011 The eFaps Team
*
* 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.
*
* Revision: $Rev: 6210 $
* Last Changed: $Date: 2011-02-18 16:02:56 -0500 (Fri, 18 Feb 2011) $
* Last Changed By: $Author: [email protected] $
*/
package org.efaps.db;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
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.efaps.admin.access.AccessTypeEnums;
import org.efaps.admin.datamodel.Attribute;
import org.efaps.admin.datamodel.SQLTable;
import org.efaps.admin.datamodel.Type;
import org.efaps.db.query.CachedResult;
import org.efaps.db.query.CompleteStatement;
import org.efaps.db.query.WhereClause;
import org.efaps.db.query.WhereClauseAttrEqAttr;
import org.efaps.db.transaction.ConnectionResource;
import org.efaps.util.EFapsException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author The eFaps Team
* @version $Id: AbstractQuery.java 6210 2011-02-18 21:02:56Z [email protected] $
* TODO: description
*/
@Deprecated
public abstract class AbstractQuery
{
/**
* Logging instance used in this class.
*/
private static final Logger LOG = LoggerFactory.getLogger(AbstractQuery.class);
private boolean checkAccess = false;
private CachedResult cachedResult = null;
protected Type type = null;
ArrayList types = new ArrayList();
/**
* The instance variable stores the order of the select types.
*
* @see #getSelectTypesOrder
*/
private final List selectTypesOrder = new ArrayList();
/**
* The instance variable stores all single join elements.
*
* @see #getJoinElements
*/
private final List joinElements = new ArrayList();
/**
* The instance variable maps expressions to join elements.
*/
private final Map mapJoinElements = new HashMap();
/**
* The instance variable stores the main instance of the join element. The
* main join element is that join elment which stores the direct selectable
* attribute values.
*
* @see #getMainJoinElement
*/
private final JoinElement mainJoinElement = new JoinElement();
/**
* The instance variable stores all main selected types. The key in this map
* is the main table.
*
* @see #getSelectTypes
*/
private final Map mainSelectTypes = new HashMap();
/**
* The instance variable stores all main where clauses. This where clauses
* must be used by all join elements! This is a different behaviour than the
* where clauses for a join element.
*
* @see #getMainWhereClauses
*/
private final List mainWhereClauses = new ArrayList();
/**
* WHereClause for the company form the context. (if given)
*/
private WhereClause companyClause;
/**
* Should the child types als be expanded?
*
* @see #isExpandChildTypes
* @see #setExpandChildTypes
*/
private boolean expandChildTypes = true;
/**
* The instance variable stores all select expressions and their relations
* to attributes for this query.
*
* @see #getAllSelExprMap
*/
private final Map allSelExprMap = new HashMap();
/**
* The instance variable stores all OID select expressions and their
* relations to attributes for this query.
*
* @see #getAllOIDSelExprMap
*/
private final Map allOIDSelExprMap = new HashMap();
private final Map oid2access = new HashMap();
// ///////////////////////////////////////////////////////////////////////////
/**
* The instance destructor calls the instance method {@link #close} to close
* the SQL statement if not happend till now. The exception thrown from
* method {@link #close} is catched and no error is thrown from this
* destructor.
*
* @see #close
*/
@Override
public void finalize()
{
try {
close();
} catch (final Exception e) {
}
}
/**
* The method closes the SQL statement. The method must be always called to
* close the query!
*
* @see #statement
*/
public void close() throws EFapsException
{
/*
* if (getStatement()!=null) { try { getStatement().close(); } catch
* (Exception e) { throw e; } finally { setStatement(null); } }
*/
}
/**
* The method adds an expression to the selectstatement.
*
* @param _expression expression to add
*/
public void addSelect(final String _expression) throws EFapsException
{
addSelect(false, _expression, this.type, _expression);
}
/**
* @param _isOID must be set to true is select expression selects the
* OID of the business object.
* @param _key key to store the select expression in the select map
* expression
* @param _attr attribute itself which must be selected
*/
protected void addSelect(final boolean _isOID, final Object _key, final Attribute _attr) throws EFapsException
{
getSelectType(_attr.getParent()).addSelect(_isOID, _key, _attr);
}
/**
* @param _isOID must be set to true is select expression selects the
* OID of the business object.
* @param _key key to store the select expression in the select map
* expression
* @param _expression
*/
protected void addSelect(final boolean _isOID, final Object _key, final Type _type, final String _expression)
throws EFapsException
{
getSelectType(_type).addSelect(_isOID, _key, _expression);
}
/**
* The instance method adds types in the order of the expand.
*
* @param _type type to add in the correct order
* @see #addTypes4Order(Type,boolean)
*/
protected void addTypes4Order(final Type _type)
{
addTypes4Order(_type, false);
}
/**
* The instance method adds types in the order of the expand.
*
* @param _type type to add in the correct order
* @param _nullAllowed type can be null
* @see #selectTypesOrder
* @see #getSelectType
*/
protected void addTypes4Order(final Type _type, final boolean _nullAllowed)
{
final SelectType selectType = getSelectType(_type);
selectType.setOrderIndex(getSelectTypesOrder().size());
selectType.setNullAllowed(_nullAllowed);
getSelectTypesOrder().add(selectType);
}
/**
* Setter method for instance variable {@link #companyClause}.
*
* @param _companyClause value for instance variable {@link #companyClause}
*/
protected void setCompanyClause(final WhereClause _companyClause)
{
this.companyClause = _companyClause;
}
// ///////////////////////////////////////////////////////////////////////////
/**
* The instance method returns for the given type the select type class
* instance of {@link #SelectType}.
*
* @param _type type for which the instance of {@link #SelectType} is
* searched
* @see #addTypes4Order
* @see #selectTypesOrder
*/
public SelectType getSelectType(final Type _type)
{
SelectType selectType = getMainSelectTypes().get(_type);
if (selectType == null) {
selectType = new SelectType(getMainJoinElement(), _type, getSelectTypesOrder().size());
getMainSelectTypes().put(_type, selectType);
for (final JoinElement elm : getJoinElements()) {
elm.addSelectType(selectType);
}
}
return selectType;
}
/**
* The method returns the size of the select expressions.
*
* @return size of the select expressions
* @see #getExpressions
*/
public int selectSize()
{
int ret = 0;
for (final JoinElement elm : getJoinElements()) {
ret += elm.selectSize();
}
return ret;
}
// ///////////////////////////////////////////////////////////////////////////
/**
* The instance method returns for the given key the attribute value.
*
* @param _key key for which the attribute value must returned
* @return atribute value for given key
*/
public Object get(final String _key) throws EFapsException
{
Object ret = null;
if (hasAccess(_key)) {
final SelExpr2Attr selExpr = getAllSelExprMap().get(_key);
if (selExpr != null) {
ret = selExpr.getAttrValue();
}
}
return ret;
}
private boolean hasAccess(final String _key) throws EFapsException
{
boolean hasAccess = true;
if (this.checkAccess) {
Instance instance = null;
String oid = null;
final SelExpr2Attr selExpr = getAllOIDSelExprMap().get(_key);
if (selExpr != null) {
oid = (String) selExpr.getAttrValue();
}
if ((oid != null) && !oid.equals("0.0")) {
instance = Instance.get(oid);
} else {
instance = getInstance(this.type);
}
if (instance != null) {
if (this.oid2access.containsKey(instance.getOid())) {
hasAccess = this.oid2access.get(instance.getOid());
} else {
hasAccess = instance.getType().hasAccess(instance, AccessTypeEnums.SHOW.getAccessType());
this.oid2access.put(instance.getOid(), hasAccess);
}
}
}
return hasAccess;
}
/**
* The instance method returns for the given key the atribute.
*
* @param _key key for which the attribute value must returned
* @return attribute for given key
*/
public Attribute getAttribute(final String _key) throws Exception
{
Attribute ret = null;
final SelExpr2Attr selExpr = getAllSelExprMap().get(_key);
if (selExpr != null) {
ret = selExpr.getAttribute();
}
return ret;
}
/**
* All object ids for one row are returned. The objects id defined in the
* expand are returned in the same order.
*
* @return list of instances from the expand
*/
public List getExpandInstances() throws EFapsException
{
final List ret = new ArrayList();
for (final Type type : this.types) {
ret.add(Instance.get(getOID(type)));
}
return ret;
}
/**
* @param _key key for which the object id value must returned
* @return object id for given key
*/
protected String getOID(final Object _key) throws EFapsException
{
String ret = null;
final SelExpr2Attr selExpr = getAllOIDSelExprMap().get(_key);
if (selExpr != null) {
ret = (String) selExpr.getAttrValue();
}
return ret;
}
/**
* The instance method returns the instance for the current selected row.
*
* @param _type
* TODO: why is in this way implemented (other way than method getOID above)
*/
protected Instance getInstance(final Type _type) throws EFapsException
{
final SelectType selectType = getMainSelectTypes().get(_type);
if (selectType == null) {
AbstractQuery.LOG.error("Type '" + _type.getName() + "' is not selected! New Instance can not created!");
throw new EFapsException(getClass(), "getInstance.TypeNotSelected", _type.getName());
}
// String id =
// getResultSet().getString(selectType.getIndexId().intValue());
final String id = this.cachedResult.getString(selectType.getIndexId().intValue());
Type type = _type;
if (selectType.getIndexType() != null) {
// long typeId =
// getResultSet().getLong(selectType.getIndexType().intValue());
final long typeId = this.cachedResult.getLong(selectType.getIndexType().intValue());
type = Type.get(typeId);
}
return Instance.get(type, id);
}
// ///////////////////////////////////////////////////////////////////////////
/**
* The instance method executes the query.
*/
public void execute() throws EFapsException
{
this.checkAccess = true;
executeWithoutAccessCheck();
}
/**
* The instance method executes the query.
*/
public void executeWithoutAccessCheck() throws EFapsException
{
if (getMainJoinElement().selectSize() > 0) {
int incSelIndex = 0;
this.cachedResult = new CachedResult();
for (final JoinElement joinElement : getJoinElements()) {
joinElement.setIncSelIndex(incSelIndex);
// warum diese Ueberpruefung? weil der join jeweils die spalte
// mit der id zum vergleichen rauschmeisst!!
if (incSelIndex == 0) {
incSelIndex += joinElement.getSelectExpressions().size();
} else {
incSelIndex += joinElement.getSelectExpressions().size() - 1;
}
final CompleteStatement completeStatement = new CompleteStatement();
joinElement.appendStatement(completeStatement, -1, isExpandChildTypes());
for (final SelectType selectType : getSelectTypesOrder()) {
if (selectType.isNullAllowed()) {
completeStatement.appendUnion();
joinElement.appendStatement(completeStatement, selectType.getOrderIndex(),
isExpandChildTypes());
}
}
executeOneCompleteStmt(completeStatement, joinElement.getMatchColumn());
}
for (final SelExpr2Attr selExpr : getAllSelExprMap().values()) {
selExpr.initSelectIndex();
}
for (final SelExpr2Attr selExpr : getAllOIDSelExprMap().values()) {
selExpr.initSelectIndex();
}
}
this.cachedResult.beforeFirst();
}
/**
* The instance method executes exact one complete statement and populates
* the result in the cached result {@link #cachedResult}.
*
* @param _complStmt complete statement instance to execute
* @param _matchColumn column in the complete statement (result set) used to
* as key to compare in the cached result
*/
private void executeOneCompleteStmt(final CompleteStatement _complStmt, final int _matchColumn)
throws EFapsException
{
ConnectionResource con = null;
try {
con = Context.getThreadContext().getConnectionResource();
if (AbstractQuery.LOG.isTraceEnabled()) {
AbstractQuery.LOG.trace(_complStmt.getStatement().toString());
}
final Statement stmt = con.getConnection().createStatement();
final ResultSet rs = stmt.executeQuery(_complStmt.getStatement().toString());
this.cachedResult.populate(rs, _matchColumn, 0);
rs.close();
stmt.close();
con.commit();
} catch (final EFapsException e) {
if (con != null) {
con.abort();
}
throw e;
} catch (final Throwable e) {
if (con != null) {
con.abort();
}
// TODO: exception eintragen!
e.printStackTrace();
throw new EFapsException(getClass(), "executeOneCompleteStmt.Throwable");
}
}
/**
* @return true if a new row is selected and exists, otherwise
* false
*/
public boolean next()
{
return this.cachedResult.next();
}
// ///////////////////////////////////////////////////////////////////////////
/**
* This is the getter method for instance variable {@link #selectTypesOrder}
* .
*
* @return value of instance variable {@link #selectTypesOrder}
* @see #selectTypesOrder
*/
public List getSelectTypesOrder()
{
return this.selectTypesOrder;
}
/**
* This is the getter method for the instance variable {@link #type}.
*
* @return value of instance variable {@link #type}
*/
public Type getType()
{
return this.type;
}
/**
* This is the getter method for instance variable {@link #joinElements}.
*
* @return value of instance variable {@link #joinElements}
* @see #joinElements
*/
protected List getJoinElements()
{
return this.joinElements;
}
/**
* This is the getter method for instance variable {@link #mapJoinElements}.
*
* @return value of instance variable {@link #mapJoinElements}
* @see #mapJoinElements
*/
protected Map getMapJoinElements()
{
return this.mapJoinElements;
}
/**
* This is the getter method for instance variable {@link #mainJoinElement}.
*
* @return value of instance variable {@link #mainJoinElement}
* @see #mainJoinElement
*/
protected JoinElement getMainJoinElement()
{
return this.mainJoinElement;
}
/**
* This is the getter method for instance variable {@link #mainSelectTypes}.
*
* @return value of instance variable {@link #mainSelectTypes}
* @see #mainSelectTypes
*/
private Map getMainSelectTypes()
{
return this.mainSelectTypes;
}
/**
* This is the getter method for instance variable {@link #mainWhereClauses}
* .
*
* @return value of instance variable {@link #mainWhereClauses}
* @see #mainWhereClauses
*/
protected List getMainWhereClauses()
{
return this.mainWhereClauses;
}
/**
* This is the getter method for instance variable {@link #expandChildTypes}
* .
*
* @return value of instance variable {@link #expandChildTypes}
* @see #expandChildTypes
* @see #setExpandChildTypes
*/
protected boolean isExpandChildTypes()
{
return this.expandChildTypes;
}
/**
* This is the setter method for instance variable {@link #expandChildTypes}
* .
*
* @param _expandChildTypes new value for instance variable
* {@link #expandChildTypes}
* @see #expandChildTypes
* @see #isExpandChildTypes
*/
public void setExpandChildTypes(final boolean _expandChildTypes)
{
this.expandChildTypes = _expandChildTypes;
}
/**
* This is the getter method for instance variable {@link #allSelExprMap}.
*
* @return value of instance variable {@link #allSelExprMap}
* @see #allSelExprMap
*/
protected Map getAllSelExprMap()
{
return this.allSelExprMap;
}
/**
* This is the getter method for instance variable {@link #allOIDSelExprMap}
* .
*
* @return value of instance variable {@link #allOIDSelExprMap}
* @see #allOIDSelExprMap
*/
protected Map getAllOIDSelExprMap()
{
return this.allOIDSelExprMap;
}
/**
* The class is used to make one join select.
*/
public class JoinElement
{
private JoinElement()
{
if (getMainSelectTypes() != null) {
getSelectTypes().addAll(getMainJoinElement().getSelectTypes());
}
getJoinElements().add(this);
}
protected void appendStatement(final CompleteStatement _completeStatement, final int _orderIndex,
final boolean _childTypes) throws EFapsException
{
_completeStatement.append("select distinct ");
appendSelectExpressions(_completeStatement, _orderIndex);
appendFrom(_completeStatement, _orderIndex);
appendWhereClause(_completeStatement, _orderIndex, _childTypes);
for (final SelectType selectType : getSelectTypesOrder()) {
if (selectType.isNullAllowed() && (_orderIndex < 0 || selectType.getOrderIndex() < _orderIndex)) {
_completeStatement.appendUnion();
_completeStatement.append("select distinct ");
appendSelectExpressions(_completeStatement, selectType.getOrderIndex());
appendFrom(_completeStatement, selectType.getOrderIndex());
appendWhereClause(_completeStatement, selectType.getOrderIndex(), _childTypes);
}
}
}
/**
* Appends all select expressions from this one join element to the
* comlete statement.
*
* @param _completeStatement complete SQL statement to select values
* @param _orderIndex ????????????????????
*/
private void appendSelectExpressions(final CompleteStatement _completeStatement, final int _orderIndex)
{
final Iterator iter = getSelectExpressions().iterator();
while (iter.hasNext()) {
final SQLSelectExpression selectExpr = iter.next();
if ((_orderIndex < 0) || selectExpr.getSelectType().getOrderIndex() < _orderIndex) {
_completeStatement.append(selectExpr.getExpression());
} else {
_completeStatement.append(selectExpr.getNullString());
}
if (iter.hasNext()) {
_completeStatement.append(",");
}
}
}
private void appendFrom(final CompleteStatement _completeStatement, final int _orderIndex)
{
for (final SelectType selectType : getSelectTypes()) {
if ((_orderIndex < 0) || (selectType.getOrderIndex() < _orderIndex)) {
selectType.appendFrom(_completeStatement);
}
}
}
private void appendWhereClause(final CompleteStatement _completeStatement, final int _orderIndex,
final boolean _childTypes) throws EFapsException
{
final Iterator typeIter = getSelectTypes().iterator();
while (typeIter.hasNext()) {
final SelectType selectType = typeIter.next();
if (_orderIndex < 0 || selectType.getOrderIndex() < _orderIndex) {
_completeStatement.appendWhereAnd();
selectType.appendTypeWhereClause(_completeStatement, _childTypes);
}
}
for (final WhereClause whereClause : this.whereClauses) {
whereClause.appendWhereClause(_completeStatement, _orderIndex);
}
if (AbstractQuery.this.companyClause != null) {
AbstractQuery.this.companyClause.appendWhereClause(_completeStatement, _orderIndex);
}
if (getMainWhereClauses().size() > 0) {
_completeStatement.appendWhereAnd();
_completeStatement.appendWhere();
_completeStatement.append(" (");
for (final WhereClause whereClause : getMainWhereClauses()) {
whereClause.appendWhereClause(_completeStatement, _orderIndex);
}
_completeStatement.append(" )");
}
}
/**
* The method returns the size of the select expressions.
*
* @return size of the select expressions
* @see #getExpressions
*/
public int selectSize()
{
return getExpressions().size();
}
/**
* Returns for the given expression the select expression. The select
* expression is tested for uniqueness (and if defined already reused).
*
* @param _selectType instance of SelectType
* @param _sqlTable SQL table which is selected
* @param _aliasTableName alias table name (defined in the from clause)
* @param _columnNAme column name within the SQL table
* @param _isId is the selected column an internal eFaps id? if true,
* the null value select is "0", otherwise the null value
* select is direct evaluated from the table information
* @return new select expression
*/
private SQLSelectExpression getSelectExpression(final SelectType _selectType, final SQLTable _sqlTable,
final int _aliasIndex, final String _columnName, final boolean _isId)
{
final String sqlExpr = new StringBuilder().append(_sqlTable.getSqlTable()).append(_aliasIndex).append('.')
.append(_columnName).toString();
SQLSelectExpression selectExpr = getExpressions().get(sqlExpr);
if (selectExpr == null) {
final String nullString = _isId ? "0" : _sqlTable.getTableInformation().getColInfo(_columnName)
.getNullValueSelect();
selectExpr = new SQLSelectExpression(getExpressions().size() + 1, sqlExpr, this, _selectType,
nullString);
getExpressions().put(sqlExpr, selectExpr);
getSelectExpressions().add(selectExpr);
}
return selectExpr;
}
/**
* @param _aliasIndex index used to create the sql prefix
* @param _selectType instance of SelectType
* @param _isOID the select statement is an OID select and must be
* stored in the OID map
* @param _key key used to store in the (OID) map
* @param _attribute attribute to select
* @see #getSelectExpression
*/
private void addSelectAttribute(final int _aliasIndex, final SelectType _selectType, final boolean _isOID,
final Object _key, final Attribute _attr)
{
final ArrayList selectExprs = new ArrayList();
if (_attr.getTable() != null) {
_selectType.getTypeTableNames().add(_attr.getTable());
for (final String _sqlColName : _attr.getSqlColNames()) {
final SQLSelectExpression selectExpr = getSelectExpression(_selectType, _attr.getTable(),
_aliasIndex, _sqlColName, false);
// System.out.println("selectExprs.add="+selectExpr);
selectExprs.add(selectExpr);
}
}
final SelExpr2Attr selExpr2Attr = new SelExpr2Attr(_attr, selectExprs);
// System.out.println("selectExprs="+selExpr2Attr);
if (_isOID) {
getAllOIDSelExprMap().put(_key, selExpr2Attr);
} else {
getAllSelExprMap().put(_key, selExpr2Attr);
}
}
/**
* The instance method creates a new instance of {@link #SelectType} add
* adds them to {@link #selectTypesOrder}.
*
* @param _type type to add in the correct order
* @param _nullAllowed type can be null
* @return new created instance of {@link #SelectType}
* @see #selectTypesOrder
*/
protected SelectType getNewSelectType(final Type _type, final boolean _nullAllowed)
{
final SelectType selectType = new SelectType(this, _type, (getSelectTypesOrder().size() + 1000));
selectType.setOrderIndex(getSelectTypesOrder().size() + 1000);
selectType.setNullAllowed(_nullAllowed);
getSelectTypesOrder().add(selectType);
addSelectType(selectType);
return selectType;
}
private void addWhere(final SelectType _selectType1, final Attribute _attr1, final SelectType _selectType2,
final Attribute _attr2) throws EFapsException
{
this.whereClauses.add(new WhereClauseAttrEqAttr(_selectType1, _attr1, _selectType2, _attr2));
}
private void addSelectType(final SelectType _selectType)
{
getSelectTypes().add(_selectType);
}
// /////////////////////////////////////////////////////////////////////////
private final List whereClauses = new ArrayList();
/**
* The instance variable stores all select types of the select
* statement.
*
* @see #getTableNames
*/
private final Set selectTypes = new HashSet();
/**
* This is the instance variable to hold all expressions. The SQL
* statement is stores as key, the value is the index of the expression
* in the select statement. This is used that an expression is only once
* in a select statement (uniqueness)!.
*
* @see #getExpressions
*/
private final Map expressions = new HashMap();
/**
* The instance variable stores all select expressions.
*
* @see #getSelectExpressions
*/
private final List selectExpressions = new ArrayList();
/**
* The instance variable stores the order of the select types. The
* information is needed if an expand is made (and in an expand a null
* value is possible!).
*
* @see #getSelectTypesOrder
*/
private final List selectTypesOrder = new ArrayList();
/**
* The instance variable stores the column index of this join element.
* The index is the select expression used to join with other select
* statements. The default value is 1 for the first column.
*
* @see #getMatchColumn
* @see #setMatchColumn
*/
private int matchColumn = 1;
/**
* The instance variable stores the number of previous select
* epxressions used to calculate the index of select expressions of this
* join element in the complete join.
*
* @see #getIncSelIndex
* @see #setIncSelIndex
*/
private int incSelIndex = 0;
// /////////////////////////////////////////////////////////////////////////
/**
* This is the getter method for instance variable {@link #selectTypes}.
*
* @return value of instance variable {@link #selectTypes}
* @see #selectTypes
*/
private Set getSelectTypes()
{
return this.selectTypes;
}
/**
* This is the getter method for instance variable {@link #expressions}.
*
* @return value of instance variable {@link #expressions}
* @see #expressions
*/
protected Map getExpressions()
{
return this.expressions;
}
/**
* This is the getter method for instance variable
* {@link #selectExpressions}.
*
* @return value of instance variable {@link #selectExpressions}
* @see #selectExpressions
*/
protected List getSelectExpressions()
{
return this.selectExpressions;
}
/**
* This is the getter method for instance variable
* {@link #selectTypesOrder}.
*
* @return value of instance variable {@link #selectTypesOrder}
* @see #selectTypesOrder
*/
public List getSelectTypesOrder()
{
return this.selectTypesOrder;
}
/**
* This is the setter method for instance variable {@link #matchColumn}.
*
* @param _orderIndex new value for instance variable
* {@link #matchColumn}
* @see #matchColumn
* @see #getMatchColumn
*/
private void setMatchColumn(final int _matchColumn)
{
this.matchColumn = _matchColumn;
}
/**
* This is the getter method for instance variable {@link #matchColumn}.
*
* @return value of instance variable {@link #matchColumn}
* @see #matchColumn
* @see #setMatchColumn
*/
public int getMatchColumn()
{
return this.matchColumn;
}
/**
* This is the setter method for instance variable {@link #incSelIndex}.
*
* @param _orderIndex new value for instance variable
* {@link #incSelIndex}
* @see #incSelIndex
* @see #getIncSelIndex
*/
private void setIncSelIndex(final int _incSelIndex)
{
this.incSelIndex = _incSelIndex;
}
/**
* This is the getter method for instance variable {@link #incSelIndex}.
*
* @return value of instance variable {@link #incSelIndex}
* @see #incSelIndex
* @see #setIncSelIndex
*/
private int getIncSelIndex()
{
return this.incSelIndex;
}
}
/**
* The class stores the relation between an select expression and an
* attribute.
*/
private class SelExpr2Attr
{
/**
* Stores the attribute.
*
* @see #getAttribute
* @see #setAttribute
*/
private Attribute attribute = null;
/**
* Stores all select expression.
*
* @see #getSelExpr
* @see #setSelExpr
*/
private ArrayList selExprs = null;
/**
* Stores all the indexes of the SQL select expression where the values
* of the attribute are found (in the same order than defined in the
* attribute).
*
* @see #getIndexes
*/
private final ArrayList indexes = new ArrayList();
// /////////////////////////////////////////////////////////////////////////
/**
* Constructor
*
* @param _attr attribute
* @param _selExprs select expressions
*/
private SelExpr2Attr(final Attribute _attr, final ArrayList _selExprs)
{
setAttribute(_attr);
setSelExprs(_selExprs);
}
/**
* After execution of the query, the indexes where that attribute values
* stands, could be initialised and used by {@link #getAttrValue}.
*/
protected void initSelectIndex()
{
// System.out.println("~~~~~~~~~~~~++initSelectIndex+"+getSelExprs());
for (final SQLSelectExpression selExpr : getSelExprs()) {
final int index = selExpr.getJoinElement().getIncSelIndex() + selExpr.getIndex();
// System.out.println("~~~~~~~~~~~~++index="+index);
getIndexes().add(new Integer(index));
}
// System.out.println("~~~~~~~~~~~~++getIndexes()="+getIndexes());
}
/**
* @return attribute value with the value returned from the select
* expression
*/
protected Object getAttrValue() throws EFapsException
{
if (getAttribute() == null) {
throw new EFapsException(getClass(), "SelectExpression.get.NoAttribute");
}
Object ret = null;
try {
ret = getAttribute().readDBValue(AbstractQuery.this.cachedResult, getIndexes());
} catch (final Exception e) {
throw new EFapsException(getClass(), "getAttrValue.CouldNotReadValue", e);
}
return ret;
}
// /////////////////////////////////////////////////////////////////////////
/**
* This is the getter method for instance variable {@link #attribute}.
*
* @return value of instance variable {@link #attribute}
* @see #attribute
* @see #setAttribute
*/
public Attribute getAttribute()
{
return this.attribute;
}
/**
* This is the setter method for instance variable {@link #attribute}.
*
* @param _attribute new value for instance variable {@link #attribute}
* @see #attribute
* @see #getAttribute
*/
private void setAttribute(final Attribute _attribute)
{
this.attribute = _attribute;
}
/**
* This is the getter method for instance variable {@link #selExprs}.
*
* @return value of instance variable {@link #selExprs}
* @see #selExprs
* @see #setSelExprs
*/
public ArrayList getSelExprs()
{
return this.selExprs;
}
/**
* This is the setter method for instance variable {@link #selExprs}.
*
* @param _selExpr new value for instance variable {@link #selExprs}
* @see #selExprs
* @see #getSelExprs
*/
private void setSelExprs(final ArrayList _selExprs)
{
this.selExprs = _selExprs;
}
/**
* This is the getter method for instance variable {@link #indexes}.
*
* @return value of instance variable {@link #indexes}
* @see #indexes
*/
public ArrayList getIndexes()
{
return this.indexes;
}
}
// ###########################################################################
// ###########################################################################
// ###########################################################################
// ###########################################################################
// ###########################################################################
private class SQLSelectExpression
{
/**
*
*/
private final int index;
/**
*
*/
private final String expression;
/**
*
*/
private final JoinElement joinElement;
/**
*
*/
private final SelectType selectType;
/**
*
*/
private final String nullString;
/**
*
*/
protected SQLSelectExpression(final int _index, final String _expression, final JoinElement _joinElement,
final SelectType _selectType, final String _nullString)
{
this.index = _index;
this.expression = _expression;
this.joinElement = _joinElement;
this.selectType = _selectType;
this.nullString = _nullString;
}
// /////////////////////////////////////////////////////////////////////////
/**
* This is the getter method for instance variable {@link #index}.
*
* @return value of instance variable {@link #index}
* @see #index
*/
public int getIndex()
{
return this.index;
}
/**
* This is the getter method for instance variable {@link #expression}.
*
* @return value of instance variable {@link #expression}
* @see #expression
*/
public String getExpression()
{
return this.expression;
}
/**
* This is the getter method for instance variable {@link #joinElement}.
*
* @return value of instance variable {@link #joinElement}
* @see #joinElement
*/
public JoinElement getJoinElement()
{
return this.joinElement;
}
/**
* This is the getter method for instance variable {@link #selectType}.
*
* @return value of instance variable {@link #selectType}
* @see #selectType
*/
public SelectType getSelectType()
{
return this.selectType;
}
/**
* This is the getter method for instance variable {@link #nullString}.
*
* @return value of instance variable {@link #nullString}
* @see #nullString
*/
public String getNullString()
{
return this.nullString;
}
}
// ###########################################################################
// ###########################################################################
// ###########################################################################
// ###########################################################################
// ###########################################################################
public class SelectType
{
/**
* The string instance variable stores the table names of the select
* statement of this selected type.
*
* @see #getTableNames
*/
private final Set typeTableNames = new HashSet();
/**
* The instance variable stores the index of the order.
*
* @see #getOrderIndex
* @see #setOrderIndex
*/
private int orderIndex = 0;
final JoinElement joinElement;
/**
* The instance variable stores the type this class instance is
* representing.
*
* @see #getType
*/
private final Type type;
/**
* The instance variable stores the index number of the type in the
* select expressions of the table. The index number is the number of
* the SQL table (from TABLENAME TABLENAME+INDEX_NUMBER)
* defined in the from statement of the complete SQL select statement.
*/
private final int typeIndex;
/**
* The instance method stores the index of the id of this type in the
* SQL table within the SQL select statement.
*
* @see #getIndexId
* @see #setIndexId
*/
private final Integer indexId;
/**
* The instance method stores the index of the type id of this type in
* the SQL table within the SQL select statement.
*
* @see #getIndexId
*/
private final Integer indexType;
/**
* The instance variable stores if the type can be null (and so the link
* to a type must not be defined...).
*
* @see #isNullAllowed
* @see #setNullAllowed
*/
private boolean nullAllowed = false;
private SelectType(final JoinElement _joinElement, final Type _type, final int _typeIndex)
{
this.joinElement = _joinElement;
this.type = _type;
this.typeIndex = _typeIndex;
getTypeTableNames().add(getType().getMainTable());
SQLSelectExpression selectExpr = this.joinElement.getSelectExpression(this, getType().getMainTable(),
this.typeIndex, getType().getMainTable().getSqlColId(), true);
this.indexId = selectExpr.getIndex();
this.joinElement.setMatchColumn(selectExpr.getIndex());
if (getType().getMainTable().getSqlColType() != null) {
selectExpr = this.joinElement.getSelectExpression(this, getType().getMainTable(), this.typeIndex,
getType().getMainTable().getSqlColType(), true);
this.indexType = selectExpr.getIndex();
} else {
this.indexType = null;
}
}
/**
* @param _isOID must be set to true is select expression selects
* the OID of the object.
* @param _key key to store the select expression in the select map
* expression
* @param _attr attribute itself which must be selected
*/
protected void addSelect(final boolean _isOID, final Object _key, final Attribute _attr)
{
this.joinElement.addSelectAttribute(this.typeIndex, this, _isOID, _key, _attr);
}
/**
* @param _isOID must be set to true is select expression selects
* the OID of the business object.
* @param _key key to store the select expression in the select map
* expression
* @param _expression expression itself which must be selected
* TODO: EFapsException Property
*/
protected void addSelect(final boolean _isOID,
final Object _key,
final String _expression)
throws EFapsException
{
// System.out.println("AbstractQuery.addSelect("+_isOID+","+_key+","+_expression+")");
if ((_expression != null) && !"".equals(_expression)) {
if (_expression.indexOf('.') >= 0) {
final JoinElement elm = new JoinElement();
final StringTokenizer tokens = new StringTokenizer(_expression, ".");
final String link = tokens.nextToken();
final Attribute attr = getType().getAttribute(link);
if (attr == null) {
AbstractQuery.LOG.error("Link for '" + link
+ "' does not exists on type " + "'" + getType().getName() + "'");
throw new EFapsException(getClass(), "addSelect.LinkDoesNotExists", link, getType().getName());
}
// add new link type
final Type linkType = attr.getLink();
if (linkType == null) {
AbstractQuery.LOG.error("For Link '" + link + "' of type " + "'" + getType().getName() + "' "
+ "the type is not defined.");
throw new EFapsException(getClass(), "addSelect.LinkDoesNotExists", link, getType().getName());
}
final SelectType selectType = elm.getNewSelectType(linkType, !attr.isRequired());
final Attribute attrFromLink = linkType.getAttribute(tokens.nextToken());
selectType.addSelect(_isOID, _key, attrFromLink);
elm.addWhere(this, attr, selectType, linkType.getAttribute("ID"));
// System.out.println("selectType.index="+selectType.getTypeIndex());
// for ID selection
final SQLSelectExpression selectExpr = elm.getSelectExpression(this, getType().getMainTable(),
this.typeIndex, getType().getMainTable().getSqlColId(), true);
elm.setMatchColumn(selectExpr.getIndex());
getTypeTableNames().add(attr.getTable());
getMapJoinElements().put(_expression, elm);
} else {
final Attribute attr = getType().getAttribute(_expression);
if (attr == null) {
AbstractQuery.LOG.error("attribute '" + _expression + "' for type " + "'" + getType().getName()
+ "' not found");
throw new EFapsException(getClass(), "addSelect.AttributeNotFound", _expression, getType()
.getName());
}
addSelect(_isOID, _key, attr);
}
}
}
/**
* Adds the tables from this attribute in a where clause.
*/
public void add4Where(final Attribute _attr)
{
for (final String sqlColName : _attr.getSqlColNames()) {
getTypeTableNames().add(_attr.getTable());
this.joinElement.getSelectExpression(this, _attr.getTable(), this.typeIndex, sqlColName, false);
}
}
protected void appendFrom(final CompleteStatement _completeStatement)
{
for (final SQLTable table : getTypeTableNames()) {
_completeStatement.appendFrom(table.getSqlTable()).append(" ").append(table.getSqlTable()).append(
this.typeIndex);
}
}
/**
* @param _childTypes also child types are allowed
*/
protected void appendTypeWhereClause(final CompleteStatement _completeStatement, final boolean _childTypes)
{
if (getType().getMainTable().getSqlColType() != null) {
if (_childTypes) {
_completeStatement.appendWhereAnd();
_completeStatement.appendWhere(getType().getMainTable().getSqlTable()).appendWhere(this.typeIndex)
.appendWhere(".");
_completeStatement.appendWhere(getType().getMainTable().getSqlColType());
_completeStatement.appendWhere(" in (");
_completeStatement.appendWhere(getType().getId());
for (final Type child : getType().getChildTypes()) {
_completeStatement.appendWhere(",").appendWhere(child.getId());
}
_completeStatement.appendWhere(")");
} else {
_completeStatement.appendWhereAnd();
_completeStatement.appendWhere(getType().getMainTable().getSqlTable()).appendWhere(this.typeIndex)
.appendWhere(".");
_completeStatement.appendWhere(getType().getMainTable().getSqlColType());
_completeStatement.appendWhere("=");
_completeStatement.appendWhere(getType().getId());
}
}
final Iterator iter = getTypeTableNames().iterator();
final SQLTable table = iter.next();
while (iter.hasNext()) {
_completeStatement.appendWhereAnd();
_completeStatement.appendWhere(table.getSqlTable()).appendWhere(this.typeIndex).appendWhere(".")
.appendWhere(table.getSqlColId());
_completeStatement.appendWhere("=");
final SQLTable nextTable = iter.next();
_completeStatement.appendWhere(nextTable.getSqlTable()).appendWhere(this.typeIndex).appendWhere(".")
.appendWhere(nextTable.getSqlColId());
}
}
/**
* This is the getter method for instance variable {@link #typeIndex}.
*
* @return value of instance variable {@link #typeIndex}
* @see #typeIndex
*/
public int getTypeIndex()
{
return this.typeIndex;
}
/**
* This is the getter method for instance variable {@link #type}.
*
* @return value of instance variable {@link #type}
* @see #type
* @see #setType
*/
public Type getType()
{
return this.type;
}
/**
* This is the getter method for instance variable {@link #indexType}.
*
* @return value of instance variable {@link #indexType}
* @see #indexType
* @see #setIndexType
*/
protected Integer getIndexType()
{
return this.indexType;
}
/**
* This is the getter method for instance variable {@link #indexId}.
*
* @return value of instance variable {@link #indexId}
* @see #indexId
* @see #setIndexId
*/
protected Integer getIndexId()
{
return this.indexId;
}
/**
* This is the getter method for instance variable
* {@link #typeTableNames}.
*
* @return value of instance variable {@link #typeTableNames}
* @see #typeTableNames
*/
protected Set getTypeTableNames()
{
return this.typeTableNames;
}
/**
* This is the getter method for instance variable {@link #nullAllowed}.
*
* @return value of instance variable {@link #nullAllowed}
* @see #nullAllowed
* @see #setNullAllowed
*/
public boolean isNullAllowed()
{
return this.nullAllowed;
}
/**
* This is the setter method for instance variable {@link #nullAllowed}.
*
* @param _nullAllowed new value for instance variable
* {@link #nullAllowed}
* @see #nullAllowed
* @see #isNullAllowed
*/
private void setNullAllowed(final boolean _nullAllowed)
{
this.nullAllowed = _nullAllowed;
}
/**
* This is the getter method for instance variable {@link #orderIndex}.
*
* @return value of instance variable {@link #orderIndex}
* @see #orderIndex
* @see #setOrderIndex
*/
public int getOrderIndex()
{
return this.orderIndex;
}
/**
* This is the setter method for instance variable {@link #orderIndex}.
*
* @param _orderIndex new value for instance variable
* {@link #orderIndex}
* @see #orderIndex
* @see #getOrderIndex
*/
private void setOrderIndex(final int _orderIndex)
{
this.orderIndex = _orderIndex;
}
}
}