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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.impl;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
/**
* InsertList will sort ChangeOperation objects so that parents are inserted before children
*
*
*/
public class InsertList {
private final Logger logger = Logger.getLogger(InsertList.class);
private Map opsByTableName = new HashMap();
private List insertOperations = new ArrayList();
private List order;
public void add(ChangeOperation op) {
if (this.logger.isDebugEnabled()) {
this.logger.debug("Adding insert operation ");
}
// If nothing has been added yet, or this is no ordering, simply
// add the operation to the list
if ((order.size() == 0) || (op.getTableName() == null)) {
insertOperations.add(op);
} else {
String name = op.getTableName();
List ops = (List) opsByTableName.get(name);
if (ops == null) {
ops = new ArrayList();
}
ops.add(op);
opsByTableName.put(name, ops);
}
}
public Collection getSortedList() {
if (this.logger.isDebugEnabled()) {
this.logger.debug("Getting sorted insert list");
}
if ((order.size() > 0) && opsByTableName.keySet().size() > 0) {
Iterator i = this.order.iterator();
while (i.hasNext()) {
String name = (String) i.next();
if (this.logger.isDebugEnabled()) {
this.logger.debug("Adding operations for table " + name);
}
// A null here means a table is in the config but hasn't been changed here
if (opsByTableName.get(name) != null) {
insertOperations.addAll((Collection) opsByTableName.get(name));
}
}
}
if (this.logger.isDebugEnabled()) {
this.logger.debug("Returning " + insertOperations.size() + " insert operations");
}
return insertOperations;
}
public void setOrder(List insertOrder) {
this.order = insertOrder;
}
}
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