org.modeshape.jcr.query.model.And Maven / Gradle / Ivy
/*
* 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 org.modeshape.common.annotation.Immutable;
import org.modeshape.common.util.CheckArg;
import org.modeshape.common.util.HashCode;
/**
* A constraint that evaluates to true when both of the other constraints evaluate to true.
*/
@Immutable
public class And implements Constraint, javax.jcr.query.qom.And {
private static final long serialVersionUID = 1L;
private final Constraint left;
private final Constraint right;
private final int hc;
public And( Constraint left,
Constraint right ) {
CheckArg.isNotNull(left, "left");
CheckArg.isNotNull(right, "right");
this.left = left;
this.right = right;
this.hc = HashCode.compute(this.left, this.right);
}
/**
* Get the constraint that is on the left-hand-side of the AND operation.
*
* @return the left-hand-side constraint
*/
public Constraint left() {
return left;
}
/**
* Get the constraint that is on the right-hand-side of the AND operation.
*
* @return the right-hand-side constraint
*/
public Constraint right() {
return right;
}
@Override
public Constraint getConstraint1() {
return left;
}
@Override
public Constraint getConstraint2() {
return right;
}
@Override
public String toString() {
return Visitors.readable(this);
}
@Override
public int hashCode() {
return hc;
}
@Override
public boolean equals( Object obj ) {
if (obj == this) return true;
if (obj instanceof And) {
And that = (And)obj;
if (this.hc != that.hc) return false;
return left.equals(that.left) && right.equals(that.right);
}
return false;
}
@Override
public void accept( Visitor visitor ) {
visitor.visit(this);
}
}
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