org.drools.core.util.ExternalizableLinkedHashMap Maven / Gradle / Ivy
/*
* Copyright 2015 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*
* 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 org.drools.core.util;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
public class ExternalizableLinkedHashMap extends LinkedHashMap implements Externalizable {
public ExternalizableLinkedHashMap() {
}
public void writeExternal( ObjectOutput out ) throws IOException {
out.writeInt( this.size() );
List keys = new ArrayList( this.keySet() );
Collections.sort( keys );
for ( K k : keys ) {
out.writeObject( k );
out.writeObject( this.get( k ) );
}
}
public void readExternal( ObjectInput in ) throws IOException, ClassNotFoundException {
int n = in.readInt();
for ( int j = 0; j < n; j++ ) {
K k = (K) in.readObject();
T t = (T) in.readObject();
this.put( k, t );
}
}
}