/*
* Copyright 2014 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.impl;
import com.google.gwt.dev.jjs.SourceOrigin;
import com.google.gwt.dev.jjs.ast.JArrayType;
import com.google.gwt.dev.jjs.ast.JCastMap;
import com.google.gwt.dev.jjs.ast.JDeclaredType;
import com.google.gwt.dev.jjs.ast.JProgram;
import com.google.gwt.dev.jjs.ast.JReferenceType;
import com.google.gwt.thirdparty.guava.common.collect.Maps;
import java.util.Map;
/**
* Builds exhaustive cast maps for class types defined in and array types used in this library.
*/
public class ComputeExhaustiveCastabilityInformation {
public static void exec(JProgram program, boolean disableCastChecking) {
new ComputeExhaustiveCastabilityInformation(program, disableCastChecking).execImpl();
}
private final Map<JReferenceType, JCastMap> castMaps = Maps.newIdentityHashMap();
private final boolean disableCastChecking;
private final JProgram program;
private ComputeExhaustiveCastabilityInformation(JProgram program, boolean disableCastChecking) {
this.program = program;
this.disableCastChecking = disableCastChecking;
}
private void createCompleteCastMap(JReferenceType sourceType) {
castMaps.put(sourceType, new JCastMap(SourceOrigin.UNKNOWN, program.getTypeJavaLangObject(),
program.typeOracle.getSuperHierarchyTypes(sourceType)));
}
private void execImpl() {
if (disableCastChecking) {
return;
}
// Builds cast maps for all types declared in this library.
for (JDeclaredType declaredType : program.getModuleDeclaredTypes()) {
createCompleteCastMap(declaredType);
}
// Builds cast maps for all array types used in this library.
for (JArrayType arrayType : program.getAllArrayTypes()) {
if (program.typeOracle.isInstantiatedType(arrayType)) {
createCompleteCastMap(arrayType);
}
}
// Saves the constructed cast maps.
program.initTypeInfo(castMaps);
}
}