com.google.gwt.dev.js.ast.JsStringLiteral 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.util.StringInterner;
/**
* A JavaScript string literal expression.
*/
public final class JsStringLiteral extends JsValueLiteral {
private final String value;
public JsStringLiteral(SourceInfo sourceInfo, String value) {
super(sourceInfo);
this.value = StringInterner.get().intern(value);
}
@Override
public NodeKind getKind() {
return NodeKind.STRING;
}
@Override
public boolean equals(Object that) {
// It is OK to check instance of here as JsStringLiteral is final.
if (!(that instanceof JsStringLiteral)) {
return false;
}
return value.equals(((JsStringLiteral) that).value);
}
public String getValue() {
return value;
}
@Override
public int hashCode() {
return value.hashCode();
}
@Override
public boolean isBooleanFalse() {
return value.length() == 0;
}
@Override
public boolean isBooleanTrue() {
return value.length() != 0;
}
@Override
public boolean isDefinitelyNull() {
return false;
}
@Override
public void traverse(JsVisitor v, JsContext ctx) {
v.visit(this, ctx);
v.endVisit(this, ctx);
}
@Override
public boolean isInternable() {
return true;
}
}