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/*
* 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.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringReader;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.HashMap;
import java.util.Map;
import javax.tools.SimpleJavaFileObject;
import org.apache.drill.shaded.guava.com.google.common.collect.Maps;
/* package */
final class DrillJavaFileObject extends SimpleJavaFileObject {
private final String sourceCode;
private final ByteArrayOutputStream outputStream;
private Map<String, DrillJavaFileObject> outputFiles;
private final String className;
public DrillJavaFileObject(final String className, final String sourceCode) {
super(makeURI(className), Kind.SOURCE);
this.className = className;
this.sourceCode = sourceCode;
this.outputStream = null;
}
private DrillJavaFileObject(final String name, final Kind kind) {
super(makeURI(name), kind);
this.className = name;
this.outputStream = new ByteArrayOutputStream();
this.sourceCode = null;
}
public boolean isCompiled() {
return (outputFiles != null);
}
public byte[][] getByteCode() {
if (!isCompiled()) {
return null;
} else {
int index = 0;
byte[][] byteCode = new byte[outputFiles.size()][];
for(DrillJavaFileObject outputFile : outputFiles.values()) {
byteCode[index++] = outputFile.outputStream.toByteArray();
}
return byteCode;
}
}
/**
* Return the byte codes for the main class and any nested
* classes.
*
* @return map of fully-qualified class names to byte codes
* for the class
*/
public Map<String,byte[]> getClassByteCodes() {
Map<String,byte[]> results = new HashMap<>();
for(DrillJavaFileObject outputFile : outputFiles.values()) {
results.put(outputFile.className, outputFile.outputStream.toByteArray());
}
return results;
}
public DrillJavaFileObject addOutputJavaFile(String className) {
if (outputFiles == null) {
outputFiles = Maps.newLinkedHashMap();
}
DrillJavaFileObject outputFile = new DrillJavaFileObject(className, Kind.CLASS);
outputFiles.put(className, outputFile);
return outputFile;
}
@Override
public Reader openReader(final boolean ignoreEncodingErrors) throws IOException {
return new StringReader(sourceCode);
}
@Override
public CharSequence getCharContent(final boolean ignoreEncodingErrors) throws IOException {
if (sourceCode == null) {
throw new UnsupportedOperationException("This instance of DrillJavaFileObject is not an input object.");
}
return sourceCode;
}
@Override
public OutputStream openOutputStream() {
if (outputStream == null) {
throw new UnsupportedOperationException("This instance of DrillJavaFileObject is not an output object.");
}
return outputStream;
}
private static URI makeURI(final String canonicalClassName) {
final int dotPos = canonicalClassName.lastIndexOf('.');
final String simpleClassName = dotPos == -1 ? canonicalClassName : canonicalClassName.substring(dotPos + 1);
try {
return new URI(simpleClassName + Kind.SOURCE.extension);
} catch (URISyntaxException e) {
throw new RuntimeException(e);
}
}
}
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