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import java.util.jar.Manifest;
import java.util.jar.Attributes;
import java.util.LinkedList;
import java.util.List;
import java.util.Iterator;
import java.io.*;
/** Writes manifest objects. Useful for creating Manifest files without writing them to files. */
public class ManifestWriter {
private List _classPaths;
private String _mainClass;
private String _rawManifest;
public static final Manifest DEFAULT = new ManifestWriter().getManifest();
/** Create a new manifest file */
public ManifestWriter() {
_classPaths = new LinkedList();
_mainClass = null;
_rawManifest = null;
}
/** Add a class path to the Manifest
* @param path the path to be added
*/
public void addClassPath(String path) {
_classPaths.add(_classPaths.size(), path);
}
/** Set the main class of the Manifest
* @param mainClass
*/
public void setMainClass(String mainClass) {
_mainClass = mainClass;
_rawManifest = null;
}
public void setManifestContents(String rawManifest) {
_rawManifest = rawManifest;
_mainClass = null;
}
/** Get an input stream to the contents of the manifest file
* @return an InputStream whose contents are the contents of the Manifest file
*/
protected InputStream getInputStream() {
// NOTE: All significant lines in the manifest MUST end in the end of line character
final StringBuilder sbuf = new StringBuilder();
sbuf.append(Attributes.Name.MANIFEST_VERSION.toString());
sbuf.append(": 1.0" + "\n");
if( !_classPaths.isEmpty() ) {
Iterator iter = _classPaths.iterator();
sbuf.append(Attributes.Name.CLASS_PATH.toString());
sbuf.append(":");
while (iter.hasNext()) {
sbuf.append(" ");
sbuf.append(iter.next());
}
sbuf.append("\n");
}
if( _mainClass != null ) {
sbuf.append(Attributes.Name.MAIN_CLASS.toString());
sbuf.append(": ");
sbuf.append(_mainClass);
sbuf.append("\n");
}
if(_rawManifest != null) {
sbuf.append(_rawManifest);
if(!_rawManifest.endsWith("\n"))
sbuf.append("\n");
}
try { return new ByteArrayInputStream(sbuf.toString().getBytes("UTF-8")); }
catch (UnsupportedEncodingException e) { throw new RuntimeException(e); }
}
/** Get the Manifest object that this object created.
* @return the Manifest that this builder created
*/
public Manifest getManifest() {
try {
Manifest m = new Manifest();
m.read(getInputStream());
return m;
}
catch (IOException e) {
e.printStackTrace();
return null;
}
}
}