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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.tuscany.das.rdb.generator.impl;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import org.apache.log4j.Logger;
import org.apache.tuscany.das.rdb.config.Column;
import org.apache.tuscany.das.rdb.config.Relationship;
import org.apache.tuscany.das.rdb.config.Table;
import org.apache.tuscany.das.rdb.config.wrapper.MappingWrapper;
import org.apache.tuscany.das.rdb.config.wrapper.RelationshipWrapper;
import org.apache.tuscany.das.rdb.config.wrapper.TableWrapper;
import org.apache.tuscany.das.rdb.impl.InsertCommandImpl;
import org.apache.tuscany.das.rdb.impl.ParameterImpl;
import commonj.sdo.DataObject;
import commonj.sdo.Property;
public final class InsertGenerator extends BaseGenerator {
public static final InsertGenerator INSTANCE = new InsertGenerator();
private final Logger logger = Logger.getLogger(InsertGenerator.class);
private InsertGenerator() {
super();
}
public InsertCommandImpl getInsertCommand(MappingWrapper config, DataObject changedObject, Table t) {
List parameters = new ArrayList();
TableWrapper table = new TableWrapper(t);
StringBuffer statement = new StringBuffer("insert into ");
//JIRA-952
if(config.getConfig().isDatabaseSchemaNameSupported()){
statement.append(t.getSchemaName()+"."+t.getTableName());
}
else{
statement.append(t.getTableName());
}
HashSet changedProperties = getAttributeProperties(changedObject, config, table);
Iterator i;
if ( changedProperties.isEmpty() ) {
i = changedObject.getType().getProperties().iterator();
} else {
i = changedProperties.iterator();
}
List attributes = new ArrayList();
List generatedKeys = new ArrayList();
while (i.hasNext()) {
Property attr = (Property) i.next();
if ( attr.getType().isDataType()) {
if (table.isGeneratedColumnProperty(attr.getName())) {
generatedKeys.add(attr.getName());
} else {
attributes.add(attr.getName());
parameters.add(changedObject.getType().getProperty(attr.getName()));
}
}
}
statement.append("(");
Iterator attrs = attributes.iterator();
while (attrs.hasNext()) {
String name = (String) attrs.next();
statement.append("");
Column c = config.getColumnByPropertyName(t, name);
statement.append(c == null ? name : c.getColumnName());
if (attrs.hasNext()) {
statement.append(", ");
} else {
statement.append(")");
}
}
statement.append(" values (");
for (int idx = 1; idx <= attributes.size(); idx++) {
statement.append('?');
if (idx < attributes.size()) {
statement.append(", ");
} else {
statement.append(")");
}
}
InsertCommandImpl cmd = new InsertCommandImpl(statement.toString(),
(String[]) generatedKeys.toArray(new String[0]));
Iterator params = parameters.iterator();
for (int idx = 1; params.hasNext(); idx++) {
Property property = (Property) params.next();
ParameterImpl p = new ParameterImpl();
p.setName(property.getName());
p.setType(property.getType());
p.setConverter(getConverter(table.getConverter(property.getName())));
p.setIndex(idx);
cmd.addParameter(p);
}
if (this.logger.isDebugEnabled()) {
this.logger.debug(statement.toString());
}
return cmd;
}
private HashSet getAttributeProperties(DataObject obj, MappingWrapper config, TableWrapper tw) {
HashSet fields = new HashSet();
Iterator i = obj.getType().getProperties().iterator();
while (i.hasNext()) {
Property p = (Property) i.next();
if (p.getType().isDataType()) {
if (obj.isSet(p)) {
if (fields.add(p) == false) {
throw new RuntimeException("Foreign key properties should not be set when the corrsponding relationship has changed");
}
}
} else {
if (obj.isSet(p)) {
Relationship relationship = config.getRelationshipByReference(p);
if ((p.getOpposite() != null && p.getOpposite().isMany())
|| (hasState(tw, relationship, obj))) {
RelationshipWrapper r = new RelationshipWrapper(relationship);
Iterator keys = r.getForeignKeys().iterator();
while (keys.hasNext()) {
String key = (String) keys.next();
String keyProperty = config.getColumnPropertyName(tw.getTableName(), key);
Property keyProp = obj.getType().getProperty(keyProperty);
if ( keyProp == null )
throw new RuntimeException("Invalid foreign key column: " + key);
if (fields.add(keyProp) == false) {
throw new RuntimeException("Foreign key properties should not be set when the corresponding relationship has changed");
}
}
}
}
}
}
return fields;
}
private boolean hasState(TableWrapper tw, Relationship rel, DataObject changedObject) {
if (!rel.isMany()) {
RelationshipWrapper rw = new RelationshipWrapper(rel);
if ((rel.getForeignKeyTable().equals(tw.getTableName()))
&& (Collections.disjoint(tw.getPrimaryKeyProperties(), rw.getForeignKeys()))) {
return true;
}
}
return false;
}
}
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