/*
* Copyright 2014-present Facebook, 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.
*/
/**
* *************
*
* <p>This code can be embedded in arbitrary third-party projects! For maximum compatibility, use
* only Java 6 constructs.
*
* <p>*************
*/
package com.facebook.buck.jvm.java;
import com.facebook.buck.util.liteinfersupport.Nullable;
import com.facebook.buck.util.liteinfersupport.Preconditions;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Map;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
@XmlRootElement(name = "fatjar")
@XmlAccessorType(XmlAccessType.FIELD)
public class FatJar {
public static final String FAT_JAR_INFO_RESOURCE = "fat_jar_info.dat";
/** The resource name for the real JAR. */
@Nullable private String innerJar;
/** The map of system-specific shared library names to their corresponding resource names. */
@Nullable private Map<String, String> nativeLibraries;
// Required for XML deserialization.
protected FatJar() {}
public FatJar(String innerJar, Map<String, String> nativeLibraries) {
this.innerJar = innerJar;
this.nativeLibraries = nativeLibraries;
}
/** @return the {@link FatJar} object deserialized from the resource name via {@code loader}. */
public static FatJar load(ClassLoader loader)
throws XMLStreamException, JAXBException, IOException {
InputStream inputStream = loader.getResourceAsStream(FAT_JAR_INFO_RESOURCE);
try {
BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream);
try {
XMLEventReader xmlEventReader =
XMLInputFactory.newFactory().createXMLEventReader(bufferedInputStream);
JAXBContext context = JAXBContext.newInstance(FatJar.class);
Unmarshaller unmarshaller = context.createUnmarshaller();
JAXBElement<FatJar> jaxbElementA = unmarshaller.unmarshal(xmlEventReader, FatJar.class);
return jaxbElementA.getValue();
} finally {
bufferedInputStream.close();
}
} finally {
inputStream.close();
}
}
/** Serialize this instance as XML to {@code outputStream}. */
public void store(OutputStream outputStream) throws JAXBException {
JAXBContext context = JAXBContext.newInstance(FatJar.class);
JAXBElement<FatJar> element = new JAXBElement<FatJar>(new QName("fatjar"), FatJar.class, this);
Marshaller marshaller = context.createMarshaller();
marshaller.marshal(element, outputStream);
}
public void unpackNativeLibrariesInto(ClassLoader loader, Path destination) throws IOException {
for (Map.Entry<String, String> entry : Preconditions.checkNotNull(nativeLibraries).entrySet()) {
InputStream input = loader.getResourceAsStream(entry.getValue());
try {
BufferedInputStream bufferedInput = new BufferedInputStream(input);
try {
Files.copy(bufferedInput, destination.resolve(entry.getKey()));
} finally {
bufferedInput.close();
}
} finally {
input.close();
}
}
}
public void unpackJarTo(ClassLoader loader, Path destination) throws IOException {
InputStream input = loader.getResourceAsStream(Preconditions.checkNotNull(innerJar));
try {
BufferedInputStream bufferedInput = new BufferedInputStream(input);
try {
Files.copy(bufferedInput, destination);
} finally {
bufferedInput.close();
}
} finally {
input.close();
}
}
}