org.apache.openjpa.meta.InheritanceOrderedMetaDataList Maven / Gradle / Ivy
/*
* 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.openjpa.meta;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.ListIterator;
import java.io.Serializable;
public class InheritanceOrderedMetaDataList
implements Serializable {
private MetaDataInheritanceComparator _comp
= new MetaDataInheritanceComparator();
private LinkedList buffer = new LinkedList();
public boolean add(ClassMetaData meta) {
if (meta == null || buffer.contains(meta))
return false;
for (ListIterator itr = buffer.listIterator();
itr.hasNext();) {
int ord = _comp.compare(meta, itr.next());
if (ord > 0)
continue;
if (ord == 0)
return false;
itr.previous();
itr.add(meta);
return true;
}
buffer.add(meta);
return true;
}
public boolean remove(ClassMetaData meta) {
return buffer.remove(meta);
}
public ClassMetaData peek() {
return buffer.peek();
}
public int size() {
return buffer.size();
}
public Iterator iterator() {
return buffer.iterator();
}
public boolean isEmpty() {
return buffer.isEmpty();
}
public void clear() {
buffer.clear();
}
}