com.google.gwt.dev.js.ast.JsBooleanLiteral Maven / Gradle / Ivy
/*
* Copyright 2008 Google Inc.
*
* 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 com.google.gwt.dev.js.ast;
import com.google.gwt.dev.jjs.SourceInfo;
import com.google.gwt.dev.jjs.SourceOrigin;
/**
* Represents a JavaScript literal boolean expression.
*/
public final class JsBooleanLiteral extends JsValueLiteral {
public static final JsBooleanLiteral FALSE = new JsBooleanLiteral(
SourceOrigin.UNKNOWN, false);
public static final JsBooleanLiteral TRUE = new JsBooleanLiteral(
SourceOrigin.UNKNOWN, true);
public static JsBooleanLiteral get(boolean value) {
return value ? TRUE : FALSE;
}
private final boolean value;
private JsBooleanLiteral(SourceInfo sourceInfo, boolean value) {
super(sourceInfo);
this.value = value;
}
public boolean getValue() {
return value;
}
public boolean isBooleanFalse() {
return value == false;
}
public boolean isBooleanTrue() {
return value == true;
}
@Override
public boolean isDefinitelyNotNull() {
return true;
}
@Override
public boolean isDefinitelyNull() {
return false;
}
public void traverse(JsVisitor v, JsContext ctx) {
v.visit(this, ctx);
v.endVisit(this, ctx);
}
private Object readResolve() {
return get(value);
}
}