/*
* 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 Rodrigo Westrupp
*/
package com.caucho.amber.cfg;
import com.caucho.amber.field.IdField;
import com.caucho.amber.table.AmberColumn;
import com.caucho.amber.table.AmberTable;
import com.caucho.amber.table.ForeignColumn;
import com.caucho.amber.type.EntityType;
import com.caucho.config.ConfigException;
import com.caucho.util.L10N;
import java.lang.reflect.AccessibleObject;
import java.util.ArrayList;
import java.util.HashMap;
import javax.persistence.CascadeType;
import javax.persistence.FetchType;
/**
* The base class for <one-to-one>, <one-to-many> and so on.
*/
abstract class AbstractRelationConfig extends AbstractConfig
{
private static final L10N L = new L10N(AbstractRelationConfig.class);
// attributes
private String _name;
private Class _targetEntity;
private FetchType _fetch = FetchType.EAGER;
// elements
private JoinTableConfig _joinTable;
private CascadeType []_cascade = new CascadeType[0];
public String getName()
{
return _name;
}
public void setName(String name)
{
_name = name;
}
public Class getTargetEntity()
{
return _targetEntity;
}
public void setTargetEntity(Class targetEntity)
{
_targetEntity = targetEntity;
}
public FetchType getFetch()
{
return _fetch;
}
public void setFetch(FetchType fetch)
{
_fetch = fetch;
}
public boolean isFetchLazy()
{
return _fetch == FetchType.LAZY;
}
public CascadeType []getCascade()
{
return _cascade;
}
protected void setCascadeTypes(CascadeType []cascade)
{
_cascade = cascade;
}
public void setCascade(CascadeConfig cascade)
{
_cascade = cascade.getCascadeTypes();
}
public JoinTableConfig getJoinTable()
{
return _joinTable;
}
public void setJoinTable(JoinTableConfig joinTable)
{
_joinTable = joinTable;
}
void validateJoinColumns(AccessibleObject field,
String fieldName,
HashMap<String,JoinColumnConfig> joinColumnMap,
EntityType targetType)
throws ConfigException
{
if (joinColumnMap == null)
return;
com.caucho.amber.field.Id id = targetType.getId();
EntityType parentType = targetType;
int idCols;
// XXX: jpa/0l48
while ((idCols = id.getKeyCount()) == 0) {
parentType = parentType.getParentType();
if (parentType == null)
break;
id = parentType.getId();
}
int size;
Object joinColumnCfg[] = null;
size = joinColumnMap.size();
joinColumnCfg = joinColumnMap.values().toArray();
if (idCols != size) {
throw error(field, L.l("Number of @JoinColumns for '{1}' ({0}) does not match the number of primary key columns for '{3}' ({2}).",
"" + size,
fieldName,
idCols,
targetType.getName()));
}
for (int i = 0; i < size; i++) {
String ref;
ref = ((JoinColumnConfig) joinColumnCfg[i]).getReferencedColumnName();
if (((ref == null) || ref.equals("")) && size > 1)
throw error(field, L.l("referencedColumnName is required when more than one @JoinColumn is specified."));
IdField key = getKey(id.getKeys(), ref);
if (key == null)
throw error(field, L.l("referencedColumnName '{0}' does not match any key column in '{1}'.",
ref, targetType.getName()));
}
}
ArrayList<ForeignColumn>
calculateColumns(AccessibleObject field,
String fieldName,
AmberTable mapTable,
String prefix,
EntityType type,
HashMap<String, JoinColumnConfig> joinColumnsConfig)
throws ConfigException
{
if (joinColumnsConfig == null || joinColumnsConfig.size() == 0)
return calculateColumns(mapTable, prefix, type);
ArrayList<ForeignColumn> columns = new ArrayList<ForeignColumn>();
// #1448 not reproduced.
if (type.getId() == null)
throw error(field, L.l("Entity {0} has no primary key defined.",
type.getName()));
ArrayList<IdField> idFields = type.getId().getKeys();
int len = joinColumnsConfig.size();
if (len != idFields.size()) {
throw error(field, L.l("@JoinColumns for {0} do not match number of the primary key columns in {1}. The foreign key columns must match the primary key columns.",
fieldName,
type.getName()));
}
for (JoinColumnConfig joinColumn : joinColumnsConfig.values()) {
ForeignColumn foreignColumn;
String name = joinColumn.getName();
String refName = joinColumn.getReferencedColumnName();
IdField id = getField(idFields, refName);
AmberColumn column = id.getColumns().get(0);
foreignColumn = mapTable.createForeignColumn(name, column);
columns.add(foreignColumn);
}
return columns;
}
IdField getField(ArrayList<IdField> fields, String name)
{
if (fields.size() == 1)
return fields.get(0);
for (IdField field : fields) {
if (field.getName().equals(name))
return field;
}
if (name == null || name.equals(""))
throw new ConfigException(L.l("{0}: '{1}' requires a referencedColumnName value because it has multiple target keys.",
getTargetEntity(), getName()));
throw new ConfigException(L.l("{0}: '{1}' is an unknown field for {2}",
getTargetEntity(), name, getName()));
}
IdField getKey(ArrayList<IdField> keys, String name)
{
if (keys.size() == 1)
return keys.get(0);
for (IdField key : keys) {
if (key.getName().equals(name))
return key;
}
return null;
}
static ArrayList<ForeignColumn> calculateColumns(com.caucho.amber.table.AmberTable mapTable,
String prefix,
EntityType type)
{
ArrayList<ForeignColumn> columns = new ArrayList<ForeignColumn>();
EntityType parentType = type;
ArrayList<com.caucho.amber.table.AmberColumn> targetIdColumns;
targetIdColumns = type.getId().getColumns();
while (targetIdColumns.size() == 0) {
parentType = parentType.getParentType();
if (parentType == null)
break;
targetIdColumns = parentType.getId().getColumns();
}
for (AmberColumn key : targetIdColumns) {
columns.add(mapTable.createForeignColumn(prefix + key.getName(), key));
}
return columns;
}
ArrayList<ForeignColumn> calculateColumns(AmberTable mapTable,
EntityType type)
{
ArrayList<ForeignColumn> columns = new ArrayList<ForeignColumn>();
EntityType parentType = type;
ArrayList<AmberColumn> targetIdColumns;
targetIdColumns = type.getId().getColumns();
while (targetIdColumns.size() == 0) {
parentType = parentType.getParentType();
if (parentType == null)
break;
targetIdColumns = parentType.getId().getColumns();
}
for (AmberColumn key : targetIdColumns) {
columns.add(mapTable.createForeignColumn(key.getName(), key));
}
return columns;
}
}