/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.drools.commons.jci.compilers;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Locale;
import java.util.Map;
import java.util.StringTokenizer;
import org.drools.commons.jci.problems.CompilationProblem;
import org.drools.commons.jci.readers.ResourceReader;
import org.drools.commons.jci.stores.ResourceStore;
import org.drools.core.util.ClassUtils;
import org.eclipse.jdt.core.compiler.IProblem;
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.IErrorHandlingPolicy;
import org.eclipse.jdt.internal.compiler.IProblemFactory;
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;
/**
* Eclipse compiler implemenation
*
* @author tcurdt
*/
public final class EclipseJavaCompiler extends AbstractJavaCompiler {
private final EclipseJavaCompilerSettings defaultSettings;
public EclipseJavaCompiler() {
this(new EclipseJavaCompilerSettings());
}
public EclipseJavaCompiler( final Map pSettings ) {
defaultSettings = new EclipseJavaCompilerSettings(pSettings);
}
public EclipseJavaCompiler( final EclipseJavaCompilerSettings pSettings ) {
defaultSettings = pSettings;
}
final class CompilationUnit implements ICompilationUnit {
final private String clazzName;
final private String fileName;
final private char[] typeName;
final private char[][] packageName;
final private ResourceReader reader;
CompilationUnit( final ResourceReader pReader, final String pSourceFile ) {
reader = pReader;
clazzName = ClassUtils.convertResourceToClassName(pSourceFile);
fileName = pSourceFile;
int dot = clazzName.lastIndexOf('.');
if (dot > 0) {
typeName = clazzName.substring(dot + 1).toCharArray();
} else {
typeName = clazzName.toCharArray();
}
final StringTokenizer izer = new StringTokenizer(clazzName, ".");
packageName = new char[izer.countTokens() - 1][];
for (int i = 0; i < packageName.length; i++) {
packageName[i] = izer.nextToken().toCharArray();
}
}
public char[] getFileName() {
return fileName.toCharArray();
}
public char[] getContents() {
final byte[] content = reader.getBytes(fileName);
if (content == null) {
return null;
//throw new RuntimeException("resource " + fileName + " could not be found");
}
return new String(content).toCharArray();
}
public char[] getMainTypeName() {
return typeName;
}
public char[][] getPackageName() {
return packageName;
}
}
public org.drools.commons.jci.compilers.CompilationResult compile(
final String[] pSourceFiles,
final ResourceReader pReader,
final ResourceStore pStore,
final ClassLoader pClassLoader,
final JavaCompilerSettings pSettings
) {
final Map settingsMap = new EclipseJavaCompilerSettings(pSettings).toNativeSettings();
final Collection problems = new ArrayList();
final ICompilationUnit[] compilationUnits = new ICompilationUnit[pSourceFiles.length];
for (int i = 0; i < compilationUnits.length; i++) {
final String sourceFile = pSourceFiles[i];
if (pReader.isAvailable(sourceFile)) {
compilationUnits[i] = new CompilationUnit(pReader, sourceFile);
} else {
// log.error("source not found " + sourceFile);
final CompilationProblem problem = new CompilationProblem() {
public int getEndColumn() {
return 0;
}
public int getEndLine() {
return 0;
}
public String getFileName() {
return sourceFile;
}
public String getMessage() {
return "Source " + sourceFile + " could not be found";
}
public int getStartColumn() {
return 0;
}
public int getStartLine() {
return 0;
}
public boolean isError() {
return true;
}
public String toString() {
return getMessage();
}
};
if (problemHandler != null) {
problemHandler.handle(problem);
}
problems.add(problem);
}
}
if (problems.size() > 0) {
final CompilationProblem[] result = new CompilationProblem[problems.size()];
problems.toArray(result);
return new org.drools.commons.jci.compilers.CompilationResult(result);
}
final IErrorHandlingPolicy policy = DefaultErrorHandlingPolicies.proceedWithAllProblems();
final IProblemFactory problemFactory = new DefaultProblemFactory(Locale.getDefault());
final INameEnvironment nameEnvironment = new INameEnvironment() {
public NameEnvironmentAnswer findType( final char[][] pCompoundTypeName ) {
final StringBuilder result = new StringBuilder();
for (int i = 0; i < pCompoundTypeName.length; i++) {
if (i != 0) {
result.append('.');
}
result.append(pCompoundTypeName[i]);
}
//log.debug("finding compoundTypeName=" + result.toString());
return findType(result.toString());
}
public NameEnvironmentAnswer findType( final char[] pTypeName, final char[][] pPackageName ) {
final StringBuilder result = new StringBuilder();
for (int i = 0; i < pPackageName.length; i++) {
result.append(pPackageName[i]);
result.append('.');
}
// log.debug("finding typeName=" + new String(typeName) + " packageName=" + result.toString());
result.append(pTypeName);
return findType(result.toString());
}
private NameEnvironmentAnswer findType( final String pClazzName ) {
if (isPackage(pClazzName)) {
return null;
}
final String resourceName = ClassUtils.convertClassToResourcePath(pClazzName);
final byte[] clazzBytes = pStore.read( resourceName );
if (clazzBytes != null) {
final char[] fileName = pClazzName.toCharArray();
try {
final ClassFileReader classFileReader = new ClassFileReader(clazzBytes, fileName, true);
return new NameEnvironmentAnswer(classFileReader, null);
} catch (final ClassFormatException e) {
throw new RuntimeException( "ClassFormatException in loading class '" + fileName + "' with JCI." );
}
}
InputStream is = null;
ByteArrayOutputStream baos = null;
try {
is = pClassLoader.getResourceAsStream(resourceName);
if (is == null) {
return null;
}
final byte[] buffer = new byte[8192];
baos = new ByteArrayOutputStream(buffer.length);
int count;
while ((count = is.read(buffer, 0, buffer.length)) > 0) {
baos.write(buffer, 0, count);
}
baos.flush();
final char[] fileName = pClazzName.toCharArray();
final ClassFileReader classFileReader = new ClassFileReader(baos.toByteArray(), fileName, true);
return new NameEnvironmentAnswer(classFileReader, null);
} catch ( final IOException e ) {
throw new RuntimeException( "could not read class",
e );
} catch ( final ClassFormatException e ) {
throw new RuntimeException( "wrong class format",
e );
} finally {
try {
if (baos != null ) {
baos.close();
}
} catch ( final IOException oe ) {
throw new RuntimeException( "could not close output stream",
oe );
}
try {
if ( is != null ) {
is.close();
}
} catch ( final IOException ie ) {
throw new RuntimeException( "could not close input stream",
ie );
}
}
}
private boolean isPackage( final String pClazzName ) {
InputStream is = null;
try {
is = pClassLoader.getResourceAsStream(ClassUtils.convertClassToResourcePath(pClazzName));
if (is != null) {
return false;
}
// FIXME: this should not be tied to the extension
final String source = pClazzName.replace('.', '/') + ".java";
if (pReader.isAvailable(source)) {
return false;
}
return true;
} finally {
if ( is != null ) {
try {
is.close();
} catch ( IOException e ) {
throw new RuntimeException( "Unable to close stream for resource: " + pClazzName );
}
}
}
}
public boolean isPackage( char[][] parentPackageName, char[] pPackageName ) {
final StringBuilder result = new StringBuilder();
if (parentPackageName != null) {
for (int i = 0; i < parentPackageName.length; i++) {
if (i != 0) {
result.append('.');
}
result.append(parentPackageName[i]);
}
}
// log.debug("isPackage parentPackageName=" + result.toString() + " packageName=" + new String(packageName));
if (parentPackageName != null && parentPackageName.length > 0) {
result.append('.');
}
result.append(pPackageName);
return isPackage(result.toString());
}
public void cleanup() {
}
};
final ICompilerRequestor compilerRequestor = new ICompilerRequestor() {
public void acceptResult( final CompilationResult pResult ) {
if (pResult.hasProblems()) {
final IProblem[] iproblems = pResult.getProblems();
for (int i = 0; i < iproblems.length; i++) {
final IProblem iproblem = iproblems[i];
final CompilationProblem problem = new EclipseCompilationProblem(iproblem);
if (problemHandler != null) {
problemHandler.handle(problem);
}
problems.add(problem);
}
}
if (!pResult.hasErrors()) {
final ClassFile[] clazzFiles = pResult.getClassFiles();
for (int i = 0; i < clazzFiles.length; i++) {
final ClassFile clazzFile = clazzFiles[i];
final char[][] compoundName = clazzFile.getCompoundName();
final StringBuilder clazzName = new StringBuilder();
for (int j = 0; j < compoundName.length; j++) {
if (j != 0) {
clazzName.append('.');
}
clazzName.append(compoundName[j]);
}
pStore.write(clazzName.toString().replace('.', '/') + ".class", clazzFile.getBytes());
}
}
}
};
final Compiler compiler = new Compiler(nameEnvironment, policy, settingsMap, compilerRequestor, problemFactory, false);
compiler.compile(compilationUnits);
final CompilationProblem[] result = new CompilationProblem[problems.size()];
problems.toArray(result);
return new org.drools.commons.jci.compilers.CompilationResult(result);
}
public JavaCompilerSettings createDefaultSettings() {
return this.defaultSettings;
}
}