/*
* 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( AddValueOperation.Externalizer.class )
public class AddValueOperation extends ArrayOperation {
protected static final int APPEND_INDEX = -1;
protected final Object value;
protected final int index;
protected transient int actualIndex = -1;
public AddValueOperation( Path path,
Object value ) {
super(path, HashCode.compute(path, value, APPEND_INDEX));
assert value != null;
this.value = value;
this.index = APPEND_INDEX;
}
public AddValueOperation( Path path,
Object value,
int index ) {
super(path, HashCode.compute(path, value, index));
assert value != null;
this.value = value;
this.index = index;
}
@Override
public AddValueOperation clone() {
return new AddValueOperation(getParentPath(), cloneValue(value), index);
}
public Object getValue() {
return value;
}
public int getIndex() {
return index;
}
public int getActualIndex() {
return actualIndex;
}
@Override
public void rollback( MutableDocument delegate ) {
if (actualIndex > -1) {
MutableArray array = mutableParent(delegate);
array.remove(actualIndex);
}
}
@Override
public void replay( MutableDocument delegate ) {
MutableArray array = mutableParent(delegate);
if (index == APPEND_INDEX) {
actualIndex = array.addValue(value);
} else {
array.addValue(index, value);
actualIndex = index;
}
}
@Override
public String toString() {
return "Add to '" + parentPath + "' the value '" + value + "'" + (index >= 0 ? " at index " + index : "");
}
@Override
public int hashCode() {
return super.hashCode();
}
@Override
public boolean equals( Object obj ) {
if (obj instanceof AddValueOperation) {
AddValueOperation other = (AddValueOperation)obj;
return equalsIfNotNull(value, other.value) && index == other.index
&& equalsIfNotNull(getParentPath(), other.getParentPath());
}
return false;
}
public static final class Externalizer extends SchematicExternalizer<AddValueOperation> {
private static final long serialVersionUID = 1L;
@Override
public void writeObject( ObjectOutput output,
AddValueOperation put ) throws IOException {
output.writeObject(put.parentPath);
output.writeInt(put.index);
output.writeObject(put.value);
}
@Override
public AddValueOperation readObject( ObjectInput input ) throws IOException, ClassNotFoundException {
Path path = (Path)input.readObject();
int index = input.readInt();
Object value = input.readObject();
return new AddValueOperation(path, value, index);
}
@Override
public Integer getId() {
return Ids.SCHEMATIC_VALUE_ADD_OPERATION;
}
@SuppressWarnings( "unchecked" )
@Override
public Set<Class<? extends AddValueOperation>> getTypeClasses() {
return Util.<Class<? extends AddValueOperation>>asSet(AddValueOperation.class);
}
}
}