/*
* Copyright 2014 - 2017 Blazebit.
*
* Licensed 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 com.blazebit.persistence.impl;
/**
*
* @author Christian Beikov
* @since 1.1.0
*/
public class BuilderListenerImpl<T> implements BuilderListener<T> {
private T currentBuilder;
public void onReplaceBuilder(T oldBuilder, T newBuilder) {
if (currentBuilder == null) {
throw new BuilderChainingException("There was an attempt to end a builder that was not started or already closed.");
}
if (currentBuilder != oldBuilder) {
throw new BuilderChainingException("There was an attempt to end a builder that was not started or already closed.");
}
currentBuilder = newBuilder;
}
public void verifyBuilderEnded() {
if (currentBuilder != null) {
throw new BuilderChainingException("A builder was not ended properly.");
}
}
@Override
public void onBuilderEnded(T builder) {
if (currentBuilder == null) {
throw new BuilderChainingException("There was an attempt to end a builder that was not started or already closed.");
}
currentBuilder = null;
}
@Override
public void onBuilderStarted(T builder) {
if (currentBuilder != null) {
throw new BuilderChainingException("There was an attempt to start a builder but a previous builder was not ended.");
}
currentBuilder = builder;
}
@Override
public boolean isBuilderEnded() {
return currentBuilder == null;
}
}