org.apache.isis.runtimes.dflt.runtime.persistence.adaptermanager.internal.PojoAdapterHashMap Maven / Gradle / Ivy
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* 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.isis.runtimes.dflt.runtime.persistence.adaptermanager.internal;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.apache.commons.collections.map.IdentityMap;
import org.apache.log4j.Logger;
import org.apache.isis.core.commons.debug.DebugBuilder;
import org.apache.isis.core.commons.lang.ToString;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
/**
* TODO: an alternative might be to use {@link IdentityMap}.
*/
public class PojoAdapterHashMap implements PojoAdapterMap {
private static class IdentityHashKey {
private final Object pojo;
public IdentityHashKey(final Object pojo) {
this.pojo = pojo;
}
@Override
public int hashCode() {
return System.identityHashCode(pojo);
}
@Override
public boolean equals(final Object obj) {
return obj == this || (obj instanceof IdentityHashKey && ((IdentityHashKey) obj).pojo == pojo);
}
}
private static final Logger LOG = Logger.getLogger(PojoAdapterHashMap.class);
public static final int DEFAULT_POJO_ADAPTER_MAP_SIZE = 10;
protected final Map