com.google.gwt.dev.jjs.ast.JDoubleLiteral 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.jjs.ast;
import com.google.gwt.dev.jjs.SourceInfo;
import com.google.gwt.dev.jjs.SourceOrigin;
/**
* Java double literal expression.
*/
public class JDoubleLiteral extends JValueLiteral {
public static final JDoubleLiteral ZERO = new JDoubleLiteral(SourceOrigin.UNKNOWN, Double
.longBitsToDouble(0L));
public static JDoubleLiteral get(double value) {
return isZero(value) ? ZERO : new JDoubleLiteral(SourceOrigin.UNKNOWN, value);
}
/**
* Does this value match the exact 0 bit pattern? (This precludes
* canonicalizing -0.0 as 0.0).
*/
private static boolean isZero(double value) {
return Double.doubleToRawLongBits(value) == 0L;
}
private final double value;
public JDoubleLiteral(SourceInfo sourceInfo, double value) {
super(sourceInfo);
this.value = value;
}
@Override
public JType getType() {
return JPrimitiveType.DOUBLE;
}
public double getValue() {
return value;
}
@Override
public Object getValueObj() {
return new Double(value);
}
@Override
public void traverse(JVisitor visitor, Context ctx) {
if (visitor.visit(this, ctx)) {
}
visitor.endVisit(this, ctx);
}
private Object readResolve() {
return isZero(value) ? ZERO : this;
}
}