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Jodd DB is efficient and thin database facade; DbOom is convenient database object mapper.
// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
package jodd.db.oom.sqlgen;
import jodd.db.DbOom;
import jodd.db.oom.ColumnAliasType;
import jodd.db.oom.ColumnData;
import jodd.db.oom.DbEntityColumnDescriptor;
import jodd.db.oom.DbEntityDescriptor;
import jodd.db.oom.DbEntityManager;
import jodd.db.oom.NamedValuesHashMap;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Template common data used during template parsing.
* Extracted to super class for better visibility.
*/
public abstract class TemplateData {
private static final String COL_CODE_PREFIX = "col_";
protected final DbEntityManager entityManager;
protected final ColumnAliasType defaultColumnAliasType;
protected TemplateData(final DbOom dbOom) {
this.entityManager = dbOom.entityManager();
this.columnAliasType = defaultColumnAliasType = dbOom.config().getDefaultColumnAliasType();
}
/**
* Resets the builder so it can be used again. Not everything is reset:
* object references and column alias type is not.
*/
protected void resetSoft() {
columnCount = 0;
paramCount = 0;
hintCount = 0;
if (tableRefs != null) {
tableRefs.clear();
}
// objectRefs = null;
if (columnData != null) {
columnData.clear();
}
if (parameters != null) {
parameters.clear();
}
if (hints != null) {
hints.clear();
}
//columnAliasType = defaultColumnAliasType;
}
protected void resetHard() {
resetSoft();
objectRefs = null;
columnAliasType = defaultColumnAliasType;
}
// ---------------------------------------------------------------- object refs
protected Map objectRefs; // used object references
/**
* Saves object reference.
*/
public void setObjectReference(final String name, final Object object) {
if (objectRefs == null) {
objectRefs = new HashMap<>();
}
objectRefs.put(name, object);
}
/**
* Returns object reference.
*/
public Object getObjectReference(final String name) {
if (objectRefs == null) {
return null;
}
return objectRefs.get(name);
}
/**
* Lookups for object reference and throws an exception if reference doesn't exist.
*/
public Object lookupObject(final String ref) {
Object value = getObjectReference(ref);
if (value == null) {
throw new DbSqlBuilderException("Invalid object reference: " + ref);
}
return value;
}
// ---------------------------------------------------------------- tables
private static final class TableRefData {
final String alias;
final DbEntityDescriptor desc;
private TableRefData(final DbEntityDescriptor desc, final String alias) {
this.alias = alias;
this.desc = desc;
}
}
protected Map tableRefs;
/**
* Returns entity descriptor for provided table reference.
*/
public DbEntityDescriptor getTableDescriptor(final String tableRef) {
if (tableRefs == null) {
return null;
}
TableRefData t = tableRefs.get(tableRef);
return t == null ? null : t.desc;
}
/**
* Finds entity descriptor of a table that contains provided column reference.
*/
public DbEntityDescriptor findTableDescriptorByColumnRef(final String columnRef) {
for (Map.Entry entry : tableRefs.entrySet()) {
DbEntityDescriptor ded = entry.getValue().desc;
if (ded.findByPropertyName(columnRef) != null) {
return ded;
}
}
return null;
}
/**
* Returns table alias for provided table reference.
*/
public String getTableAlias(final String tableRef) {
if (tableRefs == null) {
return null;
}
TableRefData t = tableRefs.get(tableRef);
return t == null ? null : t.alias;
}
/**
* Registers table reference for provided entity.
*/
public void registerTableReference(final String tableReference, final DbEntityDescriptor ded, final String tableAlias) {
if (tableRefs == null) {
tableRefs = new HashMap<>();
}
TableRefData t = new TableRefData(ded, tableAlias);
if (tableRefs.put(tableReference, t) != null) {
throw new DbSqlBuilderException("Duplicated table reference: " + tableReference);
}
}
// ---------------------------------------------------------------- column data
/**
* Column or table aliases.
*/
protected Map columnData;
/**
* Column counter for COLUMN_CODE column alias type.
*/
protected int columnCount;
/**
* Specifies column alias type. May be null when column aliases are not used.
*/
protected ColumnAliasType columnAliasType;
/**
* Returns column alias type.
*/
public ColumnAliasType getColumnAliasType() {
return columnAliasType;
}
public void registerColumnDataForTableRef(final String tableRef, final String tableName) {
if (columnData == null) {
columnData = new NamedValuesHashMap<>();
}
columnData.put(tableRef, new ColumnData(tableName));
}
public String registerColumnDataForColumnCode(final String tableName, final String column) {
if (columnData == null) {
columnData = new NamedValuesHashMap<>();
}
String columnCode = COL_CODE_PREFIX + Integer.toString(columnCount++) + '_';
columnData.put(columnCode, new ColumnData(tableName, column));
return columnCode;
}
// ---------------------------------------------------------------- parameters
protected Map parameters;
protected int paramCount;
/**
* Returns the next auto-generated parameter name.
*/
public String getNextParameterName() {
return "p" + (paramCount++);
}
/**
* Adds query parameter.
*/
public void addParameter(final String name, final Object value, final DbEntityColumnDescriptor dec) {
if (parameters == null) {
parameters = new HashMap<>();
}
parameters.put(name, new ParameterValue(value, dec));
}
// ---------------------------------------------------------------- lookup
/**
* Lookups for entity name and throws exception if entity name not found.
*/
protected DbEntityDescriptor lookupName(final String entityName) {
DbEntityDescriptor ded = entityManager.lookupName(entityName);
if (ded == null) {
throw new DbSqlBuilderException("Entity name not registered: " + entityName);
}
return ded;
}
/**
* Lookups for entity name and throws an exception if entity type is invalid.
*/
protected DbEntityDescriptor lookupType(final Class entity) {
DbEntityDescriptor ded = entityManager.lookupType(entity);
if (ded == null) {
throw new DbSqlBuilderException("Invalid or not-persistent entity type: " + entity.getName());
}
return ded;
}
/**
* Lookups for table reference and throws an exception if table reference not found.
*/
protected DbEntityDescriptor lookupTableRef(final String tableRef) {
DbEntityDescriptor ded = getTableDescriptor(tableRef);
if (ded == null) {
throw new DbSqlBuilderException("Table reference not used in this query: " + tableRef);
}
return ded;
}
// ---------------------------------------------------------------- misc
/**
* Defines parameter with name and its value.
*/
protected void defineParameter(final StringBuilder query, String name, final Object value) {
if (name == null) {
name = getNextParameterName();
}
query.append(':').append(name);
addParameter(name, value, null);
}
// ---------------------------------------------------------------- hints
protected int hintCount;
protected List hints;
/**
* Registers a hint.
*/
public void registerHint(final String hint) {
if (hints == null) {
hints = new ArrayList<>(hintCount);
}
hints.add(hint);
}
/**
* Increments hints count.
*/
public void incrementHintsCount() {
hintCount++;
}
/**
* Returns true if there are hints.
*/
public boolean hasHints() {
return hintCount > 0;
}
// ---------------------------------------------------------------- last column
public DbEntityColumnDescriptor lastColumnDec;
}