/*

* 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 javaobject;

import org.apache.geode.DataSerializable;

import org.apache.geode.Delta;

import org.apache.geode.InvalidDeltaException;

import org.apache.geode.cache.Declarable;

import org.apache.geode.Instantiator;

import java.io.DataInput;

import java.io.DataOutput;

import java.io.IOException;

import java.util.Properties;

public class DeltaEx implements DataSerializable, Delta, Declarable {

private int counter = 0;

private boolean isDelta = false;

static {

Instantiator.register(new Instantiator(DeltaEx.class, (byte) 1) {

public DataSerializable newInstance() {

return new DeltaEx();

}

});

}

public boolean hasDelta( )

{

return isDelta;

}

public void fromData( DataInput in ) throws IOException

{

counter = in.readInt( );

isDelta = false;

}

public void toData( DataOutput out ) throws IOException

{

out.writeInt( counter );

}

public void fromDelta( DataInput in ) throws IOException

{

int delta1 = in.readInt( );

if ( delta1 == 0 )

throw new InvalidDeltaException( );

counter += delta1;

isDelta = true;

}

public void toDelta( DataOutput out ) throws IOException

{

out.writeInt( 1 );

}

public void init( Properties props )

{

counter = 0;

isDelta = false;

}

};