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XDEV Application Framework
package com.xdev.jadoth.sqlengine.internal;
/*-
* #%L
* XDEV Application Framework
* %%
* Copyright (C) 2003 - 2020 XDEV Software
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import java.util.HashMap;
import java.util.List;
import com.xdev.jadoth.collections.GrowList;
import com.xdev.jadoth.sqlengine.SQL;
import com.xdev.jadoth.sqlengine.internal.interfaces.JoinContainer;
import com.xdev.jadoth.sqlengine.internal.interfaces.Joining;
import com.xdev.jadoth.sqlengine.internal.interfaces.TableClause;
import com.xdev.jadoth.sqlengine.internal.interfaces.TableExpression;
import com.xdev.jadoth.sqlengine.internal.tables.SqlTableIdentity;
/**
* The Class FROM.
*
* @author Thomas Muenz
*/
public class FROM extends SqlClause implements TableClause, Joining, JoinContainer
{
///////////////////////////////////////////////////////////////////////////
// constants //
/////////////////////
private static final long serialVersionUID = 3857247683297979348L;
///////////////////////////////////////////////////////////////////////////
// instance fields //
////////////////////
/** The table. */
private TableExpression table;
/** The joins. */
private GrowList joins = null;
///////////////////////////////////////////////////////////////////////////
// constructors //
/////////////////
/**
* Instantiates a new fROM.
*
* @param table the table
*/
public FROM(final TableExpression table)
{
super();
this.table = table;
}
protected FROM(final FROM copySource, final HashMap, SqlClause> alreadyCopied)
{
super(copySource);
this.table = copySource.table; //intentionally NOT copy the table (or SELECT) object!
if(copySource.joins != null){
for (final JoinClause j : copySource.joins) {
if(j == null) continue;
this.registerJoinClause(copySqlClause(j.copy(), alreadyCopied));
}
}
}
//////////////////////////////////////////////s/////////////////////////////
// getters //
/////////////////////
/**
* Getter of the property table.
*
* @return Returns the table.
*/
public TableExpression getTable()
{
return this.table;
}
/**
* Getter of the property alias.
*
* @return Returns the alias.
*/
public String getAlias()
{
return TableExpression.Utils.getAlias(this.table);
}
///////////////////////////////////////////////////////////////////////////
// setters //
/////////////////////
/**
* Setter of the property table.
*
* @param table The table to set.
*/
public void setTable(final TableExpression table)
{
this.table = table;
}
/**
* @return
* @see com.xdev.jadoth.sqlengine.internal.SqlClause#keyword()
*/
@Override
public String keyword()
{
return SQL.LANG.FROM;
}
/**
* Gets the clause tables.
*
* @return the clause tables
*/
public List getClauseTables()
{
final GrowList allTables = new GrowList();
if(this.table instanceof SqlTableIdentity) {
allTables.add((SqlTableIdentity)this.table);
}
if(this.joins != null){
for (final JoinClause join : this.joins) {
final TableExpression table = join.getTable();
if(table instanceof SqlTableIdentity) {
allTables.add((SqlTableIdentity)table);
}
}
}
return allTables;
}
/**
* @param
* @param newJoin
* @return
* @see com.xdev.jadoth.sqlengine.internal.interfaces.JoinContainer#registerJoinClause(com.xdev.jadoth.sqlengine.internal.JoinClause)
*/
public final C registerJoinClause(final C newJoin)
{
if(this.joins == null){
this.joins = new GrowList(8);
}
newJoin.setParentFromClause(this);
this.joins.add(newJoin);
return newJoin;
}
/**
* @param newJoin
* @return
* @see com.xdev.jadoth.sqlengine.internal.interfaces.JoinContainer#addJoinClause(com.xdev.jadoth.sqlengine.internal.JoinClause)
*/
@Override
public final FROM addJoinClause(final JoinClause newJoin)
{
this.registerJoinClause(newJoin);
return this;
}
/**
* @param table
* @param joinCondition
* @return
* @see com.xdev.jadoth.sqlengine.internal.interfaces.Joining#INNER_JOIN(com.xdev.jadoth.sqlengine.internal.interfaces.TableExpression, java.lang.Object)
*/
@Override
public JoinClause INNER_JOIN(final TableExpression table, final Object joinCondition)
{
return this.registerJoinClause(new INNER_JOIN(this, table, joinCondition));
}
/**
* @param table
* @param joinCondition
* @return
* @see com.xdev.jadoth.sqlengine.internal.interfaces.Joining#LEFT_JOIN(com.xdev.jadoth.sqlengine.internal.interfaces.TableExpression, java.lang.Object)
*/
@Override
public JoinClause LEFT_JOIN(final TableExpression table, final Object joinCondition)
{
return this.registerJoinClause(new LEFT_JOIN(this, table, joinCondition));
}
/**
* @param table
* @param joinCondition
* @return
* @see com.xdev.jadoth.sqlengine.internal.interfaces.Joining#RIGHT_JOIN(com.xdev.jadoth.sqlengine.internal.interfaces.TableExpression, java.lang.Object)
*/
@Override
public JoinClause RIGHT_JOIN(final TableExpression table, final Object joinCondition)
{
return this.registerJoinClause(new RIGHT_JOIN(this, table, joinCondition));
}
/**
* @param table
* @param joinCondition
* @return
* @see com.xdev.jadoth.sqlengine.internal.interfaces.Joining#OUTER_JOIN(com.xdev.jadoth.sqlengine.internal.interfaces.TableExpression, java.lang.Object)
*/
@Override
public JoinClause OUTER_JOIN(final TableExpression table, final Object joinCondition)
{
return this.registerJoinClause(new OUTER_JOIN(this, table, joinCondition));
}
/**
* @return
* @see com.xdev.jadoth.sqlengine.internal.interfaces.JoinContainer#getJoinCount()
*/
@Override
public int getJoinCount()
{
return this.joins==null?0:this.joins.size();
}
/**
* @return
* @see com.xdev.jadoth.sqlengine.internal.interfaces.JoinContainer#getJoins()
*/
@Override
public List getJoins()
{
return this.joins;
}
/**
* @param joins
* @return
* @see com.xdev.jadoth.sqlengine.internal.interfaces.JoinContainer#setJoins(java.util.List)
*/
// (19.05.2010 TM)XXX: Should joins collection really be set directly?
@Override
public FROM setJoins(final List joins)
{
if(joins == null){
throw new NullPointerException("joins may not be null");
}
if(this.joins == null){
this.joins = new GrowList(8);
}
else {
this.joins.clear();
}
this.joins.addAll(joins);
return this;
}
/**
* Gets the last join.
*
* @return the last join
*/
public JoinClause getLastJoin()
{
if(this.joins == null) return null;
int i = this.joins.size()-1;
JoinClause loopJoin = null;
while(i --> 0){
loopJoin = this.joins.get(i);
if(loopJoin != null) break;
}
return loopJoin;
}
/**
* @return
*/
@Override
public FROM copy()
{
return new FROM(this, new HashMap, SqlClause>());
}
/**
* @param alreadyCopied
* @return
*/
@Override
protected FROM copy(final HashMap, SqlClause> alreadyCopied)
{
return new FROM(this, alreadyCopied);
}
}
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