oracle.toplink.essentials.internal.weaving.AbstractStaticWeaveOutputHandler Maven / Gradle / Ivy
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package oracle.toplink.essentials.internal.weaving;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URISyntaxException;
import java.util.jar.JarEntry;
import java.util.jar.JarOutputStream;
/**
* The abstract class provides a set of methods to out outputs into the sepcified archive file.
*/
public abstract class AbstractStaticWeaveOutputHandler{
protected JarOutputStream outputStreamHolder=null;
/**
* create directory into target directory, or insert directory entry into outputstream.
* @param dirPath
* @throws IOException
*/
abstract public void addDirEntry(String dirPath)throws IOException;
/**
* Write entry bytes into target, this is usually called if class has been tranformed
* @param targetEntry
* @param entryBytes
* @throws IOException
*/
abstract public void addEntry(JarEntry targetEntry,byte[] entryBytes)throws IOException;
/**
* Write entry into target, this method usually copy original class into target.
* @param jis
* @param entry
* @throws IOException
*/
abstract public void addEntry(InputStream jis,JarEntry entry) throws IOException,URISyntaxException;
/**
* Close the output stream.
* @throws IOException
*/
public void closeOutputStream() throws IOException {
if(outputStreamHolder!=null){
outputStreamHolder.close();
}
}
/**
* Get the ouput stream instance.
* @return
*/
public JarOutputStream getOutputStream(){
return this.outputStreamHolder;
}
// This is part of the ugly workaround for a design flaw
// in the JDK zip API, the entry will not write into the target zip file
// properly if this method not being gone through.
protected void readwriteStreams(InputStream in, OutputStream out) throws IOException
{
int numRead;
byte[] buffer = new byte[8*1024];
while ((numRead = in.read(buffer,0,buffer.length)) != -1) {
out.write(buffer,0,numRead);
}
}
}