/*
* 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.javac;
import com.google.gwt.dev.javac.testing.impl.JavaResourceBase;
import com.google.gwt.dev.javac.testing.impl.MockResource;
import junit.framework.TestCase;
import org.eclipse.jdt.core.compiler.CategorizedProblem;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.ClassFile;
import org.eclipse.jdt.internal.compiler.CompilationResult;
import org.eclipse.jdt.internal.compiler.Compiler;
import org.eclipse.jdt.internal.compiler.DefaultErrorHandlingPolicies;
import org.eclipse.jdt.internal.compiler.ICompilerRequestor;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException;
import org.eclipse.jdt.internal.compiler.env.ICompilationUnit;
import org.eclipse.jdt.internal.compiler.env.INameEnvironment;
import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.eclipse.jdt.internal.compiler.problem.DefaultProblemFactory;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
/**
* Validates certain JDT behaviors that the compilation process may depend on
* for correctness. One useful aspect would be that if we upgrade JDT in the
* future, this test could help validate our assumptions.
*/
public class JdtBehaviorTest extends TestCase {
/**
* Hook-point if we need to modify the compiler behavior.
*/
private static class CompilerImpl extends Compiler {
public CompilerImpl(INameEnvironment environment,
ICompilerRequestor requestor) {
super(environment, DefaultErrorHandlingPolicies.proceedWithAllProblems(),
JdtCompiler.getCompilerOptions(), requestor,
new DefaultProblemFactory(Locale.getDefault()));
}
}
/**
* Hook point to accept results.
*/
private class ICompilerRequestorImpl implements ICompilerRequestor {
public void acceptResult(CompilationResult result) {
if (result.hasErrors()) {
StringBuilder sb = new StringBuilder();
for (CategorizedProblem problem : result.getErrors()) {
sb.append(problem.toString());
sb.append('\n');
}
fail(sb.toString());
}
for (ClassFile classFile : result.getClassFiles()) {
char[][] classNameArray = classFile.getCompoundName();
char[][] packageArray = CharOperation.subarray(classNameArray, 0,
classNameArray.length - 1);
char[] packageName = CharOperation.concatWith(packageArray, '.');
char[] className = CharOperation.concatWith(classNameArray, '.');
addPackages(String.valueOf(packageName));
classFiles.put(String.valueOf(className), classFile);
}
}
private void addPackages(String packageName) {
while (true) {
packages.add(String.valueOf(packageName));
int pos = packageName.lastIndexOf('.');
if (pos > 0) {
packageName = packageName.substring(0, pos);
} else {
packages.add("");
break;
}
}
}
}
/**
* How JDT receives files from the environment.
*/
private class INameEnvironmentImpl implements INameEnvironment {
public void cleanup() {
// intentionally blank
}
public NameEnvironmentAnswer findType(char[] type, char[][] pkg) {
return findType(CharOperation.arrayConcat(pkg, type));
}
public NameEnvironmentAnswer findType(char[][] compoundTypeName) {
final char[] typeChars = CharOperation.concatWith(compoundTypeName, '.');
String typeName = String.valueOf(typeChars);
// System.out.println("findType: " + typeName);
ClassFile classFile = classFiles.get(typeName);
if (classFile != null) {
try {
byte[] bytes = classFile.getBytes();
char[] loc = classFile.fileName();
ClassFileReader cfr = new ClassFileReader(bytes, loc);
return new NameEnvironmentAnswer(cfr, null);
} catch (ClassFormatException e) {
throw new RuntimeException("Unexpectedly unable to parse class file",
e);
}
}
return null;
}
public boolean isPackage(char[][] parentPkg, char[] pkg) {
final char[] pathChars = CharOperation.concatWith(parentPkg, pkg, '.');
String packageName = String.valueOf(pathChars);
// System.out.println("isPackage: " + packageName);
return packages.contains(packageName);
}
}
private static class ResourceAdapter implements ICompilationUnit {
private final MockResource sourceFile;
public ResourceAdapter(MockResource resource) {
sourceFile = resource;
}
public char[] getContents() {
try {
return Shared.readSource(sourceFile).toCharArray();
} catch (IOException ex) {
fail("Couldn't read sourceFile: " + sourceFile + " - " + ex);
}
return null;
}
public char[] getFileName() {
return sourceFile.getLocation().toCharArray();
}
public char[] getMainTypeName() {
return Shared.getShortName(Shared.getTypeName(sourceFile)).toCharArray();
}
public char[][] getPackageName() {
return CharOperation.splitOn('.', Shared.getPackageName(
Shared.getTypeName(sourceFile)).toCharArray());
}
@Override
public String toString() {
return sourceFile.toString();
}
}
protected Map<String, ClassFile> classFiles = new HashMap<String, ClassFile>();
/**
* New object for each test case.
*/
protected INameEnvironmentImpl environment = new INameEnvironmentImpl();
protected Set<String> packages = new HashSet<String>();
/**
* New object for each test case.
*/
protected ICompilerRequestorImpl requestor = new ICompilerRequestorImpl();
/**
* New object for each test case.
*/
CompilerImpl compiler = new CompilerImpl(environment, requestor);
public void testIncrementalBuild() {
List<MockResource> resources = new ArrayList<MockResource>();
Collections.addAll(resources, JavaResourceBase.getStandardResources());
resources.add(JavaResourceBase.FOO);
doCompile(resources);
// Now incremental build the bar cup.
doCompile(Arrays.asList(JavaResourceBase.BAR));
}
public void testSingleBuild() {
List<MockResource> resources = new ArrayList<MockResource>();
Collections.addAll(resources, JavaResourceBase.getStandardResources());
resources.add(JavaResourceBase.FOO);
resources.add(JavaResourceBase.BAR);
doCompile(resources);
}
private void doCompile(List<? extends MockResource> resources) {
ICompilationUnit[] icus = new ICompilationUnit[resources.size()];
for (int i = 0; i < icus.length; ++i) {
icus[i] = new ResourceAdapter(resources.get(i));
}
compiler.compile(icus);
}
}