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Show all versions of com.liferay.portal.template.freemarker
Liferay Portal Template FreeMarker
/*
* 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 freemarker.template;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
/**
* Read-only empty map. {@link #remove(Object)}, {@link #clear()} and
* {@link #putAll(Map)} with an empty {@link Map} as parameter are supported
* operations (and do nothing) since FreeMarker 2.3.20.
*
* @deprecated Use {@link Collections#EMPTY_MAP} on J2SE 1.3 or later.
*/
@Deprecated
public class EmptyMap implements Map, Cloneable {
public static final EmptyMap instance = new EmptyMap();
@Override
public void clear() {
// no op
}
@Override
public boolean containsKey(Object arg0) {
return false;
}
@Override
public boolean containsValue(Object arg0) {
return false;
}
@Override
public Set entrySet() {
return Collections.EMPTY_SET;
}
@Override
public Object get(Object arg0) {
return null;
}
@Override
public boolean isEmpty() {
return true;
}
@Override
public Set keySet() {
return Collections.EMPTY_SET;
}
@Override
public Object put(Object arg0, Object arg1) {
throw new UnsupportedOperationException("This Map is read-only.");
}
@Override
public void putAll(Map arg0) {
// Checking for arg0.isEmpty() wouldn't reflect precisely how putAll in
// AbstractMap works.
if (arg0.entrySet().iterator().hasNext()) {
throw new UnsupportedOperationException("This Map is read-only.");
}
}
@Override
public Object remove(Object arg0) {
return null;
}
@Override
public int size() {
return 0;
}
@Override
public Collection values() {
return Collections.EMPTY_LIST;
}
}
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