/*
* 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.Immutable;
import org.infinispan.schematic.document.Path;
import org.infinispan.schematic.internal.HashCode;
import org.infinispan.schematic.internal.SchematicExternalizer;
import org.infinispan.schematic.internal.document.MutableDocument;
import org.infinispan.schematic.internal.marshall.Ids;
/**
* An atomic remove operation for SchematicValueDelta.
*
* @author (various)
*/
@Immutable
@SerializeWith( RemoveOperation.Externalizer.class )
public class RemoveOperation extends Operation {
protected final String fieldName;
protected final Object oldValue;
private transient boolean removed;
public RemoveOperation( Path parentPath,
String fieldName,
Object oldValue ) {
super(parentPath, HashCode.compute(parentPath, fieldName /*,oldValue*/));
this.fieldName = fieldName;
this.oldValue = oldValue;
}
@Override
public RemoveOperation clone() {
return new RemoveOperation(getParentPath(), fieldName, cloneValue(oldValue));
}
public String getFieldName() {
return fieldName;
}
@Override
public void rollback( MutableDocument delegate ) {
if (oldValue != null) {
delegate = mutableParent(delegate);
delegate.put(fieldName, oldValue);
}
}
@Override
public void replay( MutableDocument delegate ) {
MutableDocument parent = mutableParent(delegate);
assert parent != null;
removed = parent.remove(fieldName) != null;
}
public boolean isRemoved() {
return removed;
}
@Override
public String toString() {
return "Remove from '" + parentPath + "' the '" + fieldName + "' field value '" + oldValue + "'";
}
@Override
public int hashCode() {
return super.hashCode();
}
@Override
public boolean equals( Object obj ) {
if (obj instanceof RemoveOperation) {
RemoveOperation other = (RemoveOperation)obj;
// Note we don't consider the 'oldValue', since two removes are equivalent based only upon the field name ...
return equalsIfNotNull(fieldName, other.fieldName) /*&& equalsIfNotNull(oldValue, other.oldValue)*/
&& equalsIfNotNull(getParentPath(), other.getParentPath());
}
return false;
}
public static final class Externalizer extends SchematicExternalizer<RemoveOperation> {
private static final long serialVersionUID = 1L;
@Override
public void writeObject( ObjectOutput output,
RemoveOperation remove ) throws IOException {
output.writeObject(remove.parentPath);
output.writeUTF(remove.fieldName);
}
@Override
public RemoveOperation readObject( ObjectInput input ) throws IOException, ClassNotFoundException {
Path parentPath = (Path)input.readObject();
String fieldName = input.readUTF();
return new RemoveOperation(parentPath, fieldName, null);
}
@Override
public Integer getId() {
return Ids.SCHEMATIC_VALUE_REMOVE_OPERATION;
}
@SuppressWarnings( "unchecked" )
@Override
public Set<Class<? extends RemoveOperation>> getTypeClasses() {
return Util.<Class<? extends RemoveOperation>>asSet(RemoveOperation.class);
}
}
}