/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.amber.field;
import com.caucho.amber.expr.AmberExpr;
import com.caucho.amber.expr.PathExpr;
import com.caucho.amber.query.QueryParser;
import com.caucho.amber.table.AmberColumn;
import com.caucho.amber.table.ForeignColumn;
import com.caucho.amber.table.LinkColumns;
import com.caucho.amber.type.EntityType;
import com.caucho.amber.type.AmberType;
import com.caucho.config.ConfigException;
import com.caucho.java.JavaWriter;
import com.caucho.util.L10N;
import javax.persistence.CascadeType;
import java.io.IOException;
import java.util.logging.Logger;
/**
* Configuration for a bean's field
*/
public class CollectionField extends CascadableField {
private static final L10N L = new L10N(CollectionField.class);
private static final Logger log
= Logger.getLogger(CollectionField.class.getName());
private AmberType _targetType;
private LinkColumns _linkColumns;
private String _table;
public CollectionField(EntityType relatedType,
String name,
CascadeType[] cascadeTypes)
throws ConfigException
{
super(relatedType, name, cascadeTypes);
}
public CollectionField(EntityType relatedType)
{
super(relatedType);
}
/**
* Sets the collection table.
*/
public void setTable(String table)
{
_table = table;
}
/**
* Gets the collection table.
*/
public String getTableName()
{
return _table;
}
/**
* Sets the target type.
*/
public void setType(AmberType targetType)
{
_targetType = targetType;
}
/**
* Returns the target type.
*/
public AmberType getTargetType()
{
return _targetType;
}
/**
* Sets the key columns.
*/
public void setLinkColumns(LinkColumns linkColumns)
{
_linkColumns = linkColumns;
}
/**
* Gets the key columns.
*/
public LinkColumns getLinkColumns()
{
return _linkColumns;
}
/**
* Generates the (pre) cascade operation from
* parent to this child. This field will only
* be cascaded first if the operation can be
* performed with no risk to break FK constraints.
*/
public void generatePreCascade(JavaWriter out,
String aConn,
CascadeType cascadeType)
throws IOException
{
if (isCascade(cascadeType)) {
String getter = "_caucho_field_" + getGetterName(); // generateSuperGetterMethod();
out.println("if (" + getter + " != null) {");
out.pushDepth();
out.println("for (Object o : " + getter + ") {");
out.pushDepth();
// jpa/1622
if (cascadeType == CascadeType.REMOVE) {
// jpa/0i60
out.println("com.caucho.amber.entity.Entity child = (com.caucho.amber.entity.Entity) o;");
out.println();
out.println("if (! child.__caucho_getEntityState().isTransactional())");
out.println(" continue;");
out.println();
}
// else {
// out.println("if (com.caucho.amber.entity.EntityState.P_DELETING.ordinal() <= child.__caucho_getEntityState().ordinal())");
// out.println(" continue;");
// }
out.print(aConn + ".");
switch (cascadeType) {
case PERSIST:
out.print("persistFromCascade");
break;
case MERGE:
out.print("merge");
break;
case REMOVE:
out.print("remove");
break;
case REFRESH:
out.print("refresh");
break;
}
out.println("(o);");
out.popDepth();
out.println("}");
out.popDepth();
out.println("}");
}
}
/**
* Generates the (post) cascade operation from
* parent to this child. This field will only
* be cascaded first if the operation can be
* performed with no risk to break FK constraints.
*/
public void generatePostCascade(JavaWriter out,
String aConn,
CascadeType cascadeType)
throws IOException
{
}
/**
* Generates the set clause.
*/
public void generateStatementSet(JavaWriter out, String pstmt,
String obj, String index)
throws IOException
{
}
/**
* Generates loading cache
*/
public void generateUpdate(JavaWriter out, String mask, String pstmt,
String index)
throws IOException
{
String maskVar = mask + "_" + (getIndex() / 64);
long maskValue = (1L << (getIndex() % 64));
out.println();
out.println("if ((" + maskVar + " & " + maskValue + "L) != 0) {");
out.pushDepth();
generateStatementSet(out, pstmt, index);
out.popDepth();
out.println("}");
}
/**
* Updates the cached copy.
*/
public void generateCopyUpdateObject(JavaWriter out,
String dst, String src,
int updateIndex)
throws IOException
{
}
/**
* Generates the select clause.
*/
public String generateLoadSelect(String id)
{
return null;
}
/**
* Generates the target select.
*/
public String generateTargetSelect(String id)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Creates the expression for the field.
*/
public AmberExpr createExpr(QueryParser parser, PathExpr parent)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Generates the linking for a join
*/
public String generateJoin(String sourceTable, String targetTable)
{
return _linkColumns.generateJoin(sourceTable, targetTable);
}
/**
* Returns the source column for a given target key.
*/
public ForeignColumn getSourceColumn(AmberColumn key)
{
return _linkColumns.getSourceColumn(key);
}
}