org.apache.juneau.internal.DelegateMap Maven / Gradle / Ivy
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// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance *
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// * *
// * http://www.apache.org/licenses/LICENSE-2.0 *
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// ***************************************************************************************************************************
package org.apache.juneau.internal;
import java.util.*;
import org.apache.juneau.*;
/**
* Represents a wrapped {@link Map} where entries in the map can be removed without affecting the underlying map.
*
* @param The class type of the wrapped bean.
*/
public class DelegateMap extends ObjectMap implements Delegate {
private static final long serialVersionUID = 1L;
private transient ClassMeta classMeta;
/**
* Constructor.
*
* @param classMeta The metadata object that created this delegate object.
*/
public DelegateMap(ClassMeta classMeta) {
this.classMeta = classMeta;
}
@Override /* Delegate */
public ClassMeta getClassMeta() {
return classMeta;
}
/**
* Remove all but the specified keys from this map.
*
*
* This does not affect the underlying map.
*
* @param keys The remaining keys in the map (in the specified order).
*/
public void filterKeys(List keys) {
ObjectMap m2 = new ObjectMap();
for (String k : keys)
m2.put(k, get(k));
this.clear();
this.putAll(m2);
}
}