/**
* 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.waveprotocol.wave.model.document.indexed;
import org.waveprotocol.wave.model.document.indexed.DocumentHandler.EventBundle;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
/**
* Holds a composite document event.
*/
public final class EventBundleImpl<N, E extends N, T extends N> implements EventBundle<N, E, T> {
final static class Builder<N, E extends N, T extends N> {
private final List<DocumentEvent<N, E, T>> components = new ArrayList<DocumentEvent<N, E, T>>();
private Collection<E> inserted;
private Collection<E> deleted;
Builder() {
}
void addComponent(DocumentEvent<N, E, T> event) {
components.add(event);
}
void addDeletedElement(E e) {
if (deleted == null) {
deleted = new LinkedHashSet<E>();
}
deleted.add(e);
}
void addInsertedElement(E e) {
if (inserted == null) {
inserted = new ArrayList<E>();
}
inserted.add(e);
}
EventBundleImpl<N, E, T> build() {
if (inserted == null) {
inserted = Collections.emptySet();
}
if (deleted == null) {
deleted = Collections.emptySet();
}
return new EventBundleImpl<N, E, T>(components, deleted, inserted);
}
}
private final List<DocumentEvent<N, E, T>> components;
private final Collection<E> deleted;
private final Collection<E> inserted;
EventBundleImpl(List<DocumentEvent<N, E, T>> components, Collection<E> deleted,
Collection<E> inserted) {
this.components = components;
this.deleted = deleted;
this.inserted = inserted;
}
@Override
public Iterable<DocumentEvent<N, E, T>> getEventComponents() {
return components;
}
@Override
public Collection<E> getDeletedElements() {
return deleted;
}
@Override
public Collection<E> getInsertedElements() {
return inserted;
}
public boolean wasDeleted(E element) {
return deleted.contains(element);
}
}