/**
* 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.apache.drill.exec.compile;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import javax.tools.DiagnosticListener;
import javax.tools.JavaCompiler;
import javax.tools.JavaCompiler.CompilationTask;
import javax.tools.JavaFileObject;
import javax.tools.ToolProvider;
import org.apache.drill.exec.compile.ClassTransformer.ClassNames;
import org.codehaus.commons.compiler.CompileException;
import com.google.common.base.Charsets;
import com.google.common.collect.Lists;
class JDKClassCompiler extends AbstractClassCompiler {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(JDKClassCompiler.class);
private final Collection<String> compilerOptions;
private final DiagnosticListener<JavaFileObject> listener;
private final JavaCompiler compiler;
private final DrillJavaFileManager fileManager;
public JDKClassCompiler(ClassLoader classLoader, boolean debug) {
super(debug);
this.compiler = ToolProvider.getSystemJavaCompiler();
if (compiler == null) {
throw new UnsupportedOperationException("JDK Java compiler not available - probably you're running a JRE, not a JDK");
}
this.listener = new DrillDiagnosticListener();
this.fileManager = new DrillJavaFileManager(compiler.getStandardFileManager(listener, null, Charsets.UTF_8), classLoader);
this.compilerOptions = Lists.newArrayList(this.debug ? "-g:source,lines,vars" : "-g:none");
}
@Override
protected byte[][] getByteCode(final ClassNames className, final String sourceCode)
throws CompileException, IOException, ClassNotFoundException {
try {
// Create one Java source file in memory, which will be compiled later.
DrillJavaFileObject compilationUnit = new DrillJavaFileObject(className.dot, sourceCode);
CompilationTask task = compiler.getTask(null, fileManager, listener, compilerOptions, null, Collections.singleton(compilationUnit));
// Run the compiler.
if(!task.call()) {
throw new CompileException("Compilation failed", null);
} else if (!compilationUnit.isCompiled()) {
throw new ClassNotFoundException(className + ": Class file not created by compilation.");
}
// all good
return compilationUnit.getByteCode();
} catch (RuntimeException rte) {
// Unwrap the compilation exception and throw it.
Throwable cause = rte.getCause();
if (cause != null) {
cause = cause.getCause();
if (cause instanceof CompileException) {
throw (CompileException) cause;
}
if (cause instanceof IOException) {
throw (IOException) cause;
}
}
throw rte;
}
}
@Override
protected org.slf4j.Logger getLogger() { return logger; }
}