/*
* ModeShape (http://www.modeshape.org)
*
* Licensed 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 org.infinispan.schematic.internal.delta;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Set;
import org.infinispan.commons.marshall.SerializeWith;
import org.infinispan.commons.util.Util;
import org.infinispan.schematic.document.Path;
import org.infinispan.schematic.internal.HashCode;
import org.infinispan.schematic.internal.SchematicExternalizer;
import org.infinispan.schematic.internal.document.MutableArray;
import org.infinispan.schematic.internal.document.MutableDocument;
import org.infinispan.schematic.internal.marshall.Ids;
/**
* An atomic array add operation for SchematicValueDelta.
*
* @author Randall Hauch <rhauch@redhat.com> (C) 2011 Red Hat Inc.
* @since 5.1
*/
@SerializeWith( RemoveAtIndexOperation.Externalizer.class )
public class RemoveAtIndexOperation extends ArrayOperation {
protected final int index;
protected transient Object actualValue = null;
public RemoveAtIndexOperation( Path path,
int index ) {
super(path, HashCode.compute(path, index));
this.index = index;
}
@Override
public RemoveAtIndexOperation clone() {
return new RemoveAtIndexOperation(getParentPath(), index);
}
public int getIndex() {
return index;
}
public Object getRemovedValue() {
return actualValue;
}
@Override
public void rollback( MutableDocument delegate ) {
if (actualValue != null) {
MutableArray array = mutableParent(delegate);
array.add(index, actualValue);
}
}
@Override
public void replay( MutableDocument delegate ) {
MutableArray array = mutableParent(delegate);
actualValue = array.remove(index);
}
@Override
public String toString() {
return "Remove at '" + parentPath + "' the value at index " + index;
}
@Override
public int hashCode() {
return super.hashCode();
}
@Override
public boolean equals( Object obj ) {
if (obj instanceof RemoveAtIndexOperation) {
RemoveAtIndexOperation other = (RemoveAtIndexOperation)obj;
return index == other.index && equalsIfNotNull(getParentPath(), other.getParentPath());
}
return false;
}
public static final class Externalizer extends SchematicExternalizer<RemoveAtIndexOperation> {
private static final long serialVersionUID = 1L;
@Override
public void writeObject( ObjectOutput output,
RemoveAtIndexOperation put ) throws IOException {
output.writeObject(put.parentPath);
output.writeObject(put.index);
}
@Override
public RemoveAtIndexOperation readObject( ObjectInput input ) throws IOException, ClassNotFoundException {
Path path = (Path)input.readObject();
int index = input.readInt();
return new RemoveAtIndexOperation(path, index);
}
@Override
public Integer getId() {
return Ids.SCHEMATIC_VALUE_REMOVE_AT_INDEX_OPERATION;
}
@SuppressWarnings( "unchecked" )
@Override
public Set<Class<? extends RemoveAtIndexOperation>> getTypeClasses() {
return Util.<Class<? extends RemoveAtIndexOperation>>asSet(RemoveAtIndexOperation.class);
}
}
}