/*
* FindBugs - Find Bugs in Java programs
* Copyright (C) 2006, University of Maryland
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package edu.umd.cs.findbugs.classfile.impl;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import edu.umd.cs.findbugs.ba.AnalysisContext;
import edu.umd.cs.findbugs.classfile.ICodeBase;
import edu.umd.cs.findbugs.classfile.ICodeBaseEntry;
import edu.umd.cs.findbugs.classfile.ICodeBaseIterator;
import edu.umd.cs.findbugs.classfile.ResourceNotFoundException;
import edu.umd.cs.findbugs.io.IO;
/**
* A scannable code base class for a zip (or Jar) file nested inside some other
* codebase. These are handled by extracting the nested zip/jar file to a
* temporary file, and delegating to an internal ZipFileCodeBase that reads from
* the temporary file.
*
* @author David Hovemeyer
*/
public class NestedZipFileCodeBase extends AbstractScannableCodeBase {
private final ICodeBase parentCodeBase;
private final String resourceName;
private File tempFile;
private AbstractScannableCodeBase delegateCodeBase;
/**
* Constructor.
*
* @param codeBaseLocator
* the codebase locator for this codebase
*/
public NestedZipFileCodeBase(NestedZipFileCodeBaseLocator codeBaseLocator) throws ResourceNotFoundException, IOException {
super(codeBaseLocator);
this.parentCodeBase = codeBaseLocator.getParentCodeBase();
this.resourceName = codeBaseLocator.getResourceName();
InputStream inputStream = null;
OutputStream outputStream = null;
try {
// Create a temp file
this.tempFile = File.createTempFile("findbugs", ".zip");
tempFile.deleteOnExit(); // just in case we crash before the
// codebase is closed
// Copy nested zipfile to the temporary file
// FIXME: potentially long blocking operation - should be
// interruptible
ICodeBaseEntry resource = parentCodeBase.lookupResource(resourceName);
if (resource == null) {
throw new ResourceNotFoundException(resourceName);
}
inputStream = resource.openResource();
outputStream = new BufferedOutputStream(new FileOutputStream(tempFile));
IO.copy(inputStream, outputStream);
outputStream.flush();
// Create the delegate to read from the temporary file
delegateCodeBase = ZipCodeBaseFactory.makeZipCodeBase(codeBaseLocator, tempFile);
} finally {
if (inputStream != null) {
IO.close(inputStream);
}
if (outputStream != null) {
IO.close(outputStream);
}
}
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.classfile.IScannableCodeBase#iterator()
*/
@Override
public ICodeBaseIterator iterator() throws InterruptedException {
return new DelegatingCodeBaseIterator(this, delegateCodeBase);
}
/*
* (non-Javadoc)
*
* @see
* edu.umd.cs.findbugs.classfile.ICodeBase#lookupResource(java.lang.String)
*/
@Override
public ICodeBaseEntry lookupResource(String resourceName) {
ICodeBaseEntry delegateCodeBaseEntry = delegateCodeBase.lookupResource(resourceName);
if (delegateCodeBaseEntry == null) {
return null;
}
return new DelegatingCodeBaseEntry(this, delegateCodeBaseEntry);
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.classfile.ICodeBase#getPathName()
*/
@Override
public String getPathName() {
return null;
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.classfile.ICodeBase#close()
*/
@Override
public void close() {
delegateCodeBase.close();
if (!tempFile.delete()) {
AnalysisContext.logError("Could not delete " + tempFile);
}
}
}