/*
* 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.modeshape.jcr.query.model;
import java.util.Set;
import org.modeshape.common.annotation.Immutable;
/**
* Implementation of the {@link org.modeshape.jcr.api.query.qom.Cast} operand.
*
* @author Horia Chiorean (hchiorea@redhat.com)
*/
@Immutable
public final class Cast implements DynamicOperand, org.modeshape.jcr.api.query.qom.Cast {
private final DynamicOperand operand;
private final String desiredTypeName;
/**
* Creates a new operand instance, wrapping another operand and the desired type.
*
* @param operand a {@link DynamicOperand} instance, never {@code null}
* @param desiredTypeName a {@link String}, the name of the desired type to cast to; never null
*/
public Cast( DynamicOperand operand, String desiredTypeName ) {
this.operand = operand;
this.desiredTypeName = desiredTypeName;
}
/**
* Get the selector symbol upon which this operand applies.
*
* @return the one selector names used by this operand; never null
*/
public SelectorName selectorName() {
return operand.selectorNames().iterator().next();
}
@Override
public String getDesiredTypeName() {
return desiredTypeName;
}
@Override
public Set<SelectorName> selectorNames() {
return operand.selectorNames();
}
/**
* Get the inner operand.
*
* @return a {@link DynamicOperand} instance, never {@code null}
*/
public DynamicOperand getOperand() {
return operand;
}
@Override
public void accept( Visitor visitor ) {
visitor.visit(this);
}
@Override
public String toString() {
return Visitors.readable(this);
}
@Override
public int hashCode() {
return getOperand().hashCode();
}
@Override
public boolean equals( Object obj ) {
if (obj == this) return true;
if (obj instanceof Cast) {
Cast that = (Cast)obj;
return this.operand.equals(that.operand);
}
return false;
}
}