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Google XML Pages (GXP) is a templating system used to generate XML/SGML markup (most often HTML).
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/*
* Copyright (C) 2008 Google Inc.
*
* 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.google.gxp.compiler.alerts;
import com.google.common.collect.Sets;
import java.util.*;
/**
* Builder for AlertSets. Note that there are very few "read" methods by
* design. An AlertSetBuilder is intended to be write-only, except for the
* {@link #buildAndClear()} method which returns a (by contrast, read-only)
* AlertSet. This is intended to discourage passing AlertSetBuilders between
* modules. Instead, pass AlertSets around between modules.
*/
public final class AlertSetBuilder implements AlertSink {
private LinkedHashSet alerts;
/**
* Create a clear AlertSetBuilder.
*/
public AlertSetBuilder() {
clear();
}
/**
* Create a clear AlertSetBuilder initialized with the {@code Alert}s
* in {@code alertSet}.
*/
public AlertSetBuilder(AlertSet alertSet) {
clear();
addAll(alertSet);
}
/**
* Clears this AlertSetBuilder. If {@link #buildAndClear()} is called
* immediately afterwards, an empty AlertSet will be created.
*/
public void clear() {
alerts = Sets.newLinkedHashSet();
}
/**
* Builds an AlertSet containing all of the Alerts that were added to this
* AlertSetBuilder (since it was last cleared), and then clears this
* AlertSetBuilder.
*/
public AlertSet buildAndClear() {
AlertSet result = new AlertSet(alerts);
clear();
return result;
}
public void addAll(AlertSet alertSet) {
for (Alert alert : alertSet) {
add(alert);
}
}
public void add(Alert alert) {
alerts.add(alert);
}
}