| /* |
| * 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; |
| |
| /** |
| * Used in object literals to specify property values by name. |
| */ |
| public class JsPropertyInitializer extends JsNode { |
| |
| private JsExpression labelExpr; |
| |
| private JsExpression valueExpr; |
| |
| public JsPropertyInitializer(SourceInfo sourceInfo) { |
| super(sourceInfo); |
| } |
| |
| public JsPropertyInitializer(SourceInfo sourceInfo, JsExpression labelExpr, |
| JsExpression valueExpr) { |
| super(sourceInfo); |
| |
| this.labelExpr = labelExpr; |
| this.valueExpr = valueExpr; |
| assert isLabelProper(); |
| } |
| |
| @Override |
| public boolean equals(Object that) { |
| if (that == null || that.getClass() != this.getClass()) { |
| return false; |
| } |
| JsPropertyInitializer thatPropertyInitializer = (JsPropertyInitializer) that; |
| |
| assert isLabelProper() && ((JsPropertyInitializer) that).isLabelProper(); |
| return areLabelsEqual(labelExpr, thatPropertyInitializer.labelExpr) && |
| valueExpr.equals(thatPropertyInitializer.valueExpr); |
| } |
| |
| @Override |
| public NodeKind getKind() { |
| return NodeKind.PROPERTY_INIT; |
| } |
| |
| public JsExpression getLabelExpr() { |
| return labelExpr; |
| } |
| |
| public JsExpression getValueExpr() { |
| return valueExpr; |
| } |
| |
| @Override |
| public int hashCode() { |
| return labelExpr.toString().hashCode() + 17 * valueExpr.hashCode(); |
| } |
| |
| public boolean hasSideEffects() { |
| return labelExpr.hasSideEffects() || valueExpr.hasSideEffects(); |
| } |
| |
| public void setValueExpr(JsExpression valueExpr) { |
| this.valueExpr = valueExpr; |
| } |
| |
| @Override |
| public void traverse(JsVisitor v, JsContext ctx) { |
| if (v.visit(this, ctx)) { |
| labelExpr = v.accept(labelExpr); |
| valueExpr = v.accept(valueExpr); |
| } |
| v.endVisit(this, ctx); |
| } |
| |
| private static boolean areLabelsEqual(JsExpression thisLabel, JsExpression thatLabel) { |
| if (thisLabel instanceof JsNameRef && thatLabel instanceof JsNameRef) { |
| JsNameRef thisJsNameRef = (JsNameRef) thisLabel; |
| JsNameRef thatJsNameRef = (JsNameRef) thatLabel; |
| return thisJsNameRef.getIdent().equals(thatJsNameRef.getIdent()); |
| } |
| return thisLabel.equals(thatLabel); |
| } |
| |
| private boolean isLabelProper() { |
| if (labelExpr instanceof JsStringLiteral || labelExpr instanceof JsNumberLiteral) { |
| return true; |
| } |
| |
| if (!(labelExpr instanceof JsNameRef)) { |
| return false; |
| } |
| |
| JsNameRef labelJsNameRef = (JsNameRef) labelExpr; |
| |
| return labelJsNameRef.getQualifier() == null; |
| } |
| } |