org.modeshape.jcr.query.model.Literal 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;
/**
* A literal value used in a {@link Comparison} constraint.
*/
@Immutable
public class Literal implements StaticOperand {
private static final long serialVersionUID = 1L;
private final Object value;
public Literal( Object value ) {
CheckArg.isNotNull(value, "value");
this.value = value;
}
/**
* Get the literal value.
*
* @return the value; never null
*/
public final Object value() {
return value;
}
@Override
public String toString() {
return Visitors.readable(this);
}
@Override
public int hashCode() {
return value().hashCode();
}
@Override
public boolean equals( Object obj ) {
if (obj == this) return true;
if (obj instanceof Literal) {
Literal that = (Literal)obj;
return this.value.equals(that.value) || this.value.toString().equals(that.value.toString());
}
// Otherwise, check whether this literal's value is the same as the object ...
return this.value.equals(obj);
}
@Override
public void accept( Visitor visitor ) {
visitor.visit(this);
}
}
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