StaticWeaveProcessorpublic class StaticWeaveProcessor extends Object
Description: The StaticWeaveProcessor controls the static weaving process. It is invoked by both the command line
StaticWeave class and the StaticWeaveAntTask.
Responsibilities:Process the source classes, performs weaving as necessary out outputs to the target |
| Fields Summary |
|---|
| private URL | source | | private URL | target | | private URL | persistenceInfo | | private Writer | logWriter | | private ClassLoader | classLoader | | private int | logLevel |
| Constructors Summary |
|---|
public StaticWeaveProcessor(String source, String target)Constructs an instance of StaticWeaveProcessor
if (source!=null){
this.source=new File(source).toURL();
}
if (target!=null){
this.target=new File(target).toURL();
}
| public StaticWeaveProcessor(File source, File target)Constructs an instance of StaticWeaveProcessor
this.source=source.toURL();
this.target=target.toURL();
| public StaticWeaveProcessor(URL source, URL target)Constructs an instance of StaticWeaveProcessor
this.source=source;
this.target=target;
|
| Methods Summary |
|---|
| public static java.lang.String | getDirectoryFromEntryName(java.lang.String entryName)
String result="";
if (entryName==null ) {
return result;
}
if(entryName.lastIndexOf("/")>=0){
result=entryName.substring(0, entryName.lastIndexOf("/"))+File.separator;
}
return result;
| | private java.net.URL[] | getURLs()
if((this.source!=null) && (this.persistenceInfo!=null)){
return new URL[]{this.persistenceInfo,this.source};
} else if(this.source!=null){
return new URL[]{this.source};
} else if (this.persistenceInfo!=null){
return new URL[]{this.persistenceInfo};
}
return new URL[]{};
| | private boolean | isDirectory(java.net.URL url)
File file = new File(url.toURI());
if (file.isDirectory()) {
return true;
}else{
return false;
}
| | public void | performWeaving()This method performs weaving function on the class individually from the specified source.
preProcess();
process();
| | private void | preProcess()
//Instantiate default session log
AbstractSessionLog.getLog().setLevel(this.logLevel);
if(logWriter!=null){
((DefaultSessionLog)AbstractSessionLog.getLog()).setWriter(logWriter);
}
//Make sure the source is existing
if(!(new File(source.toURI())).exists()){
throw StaticWeaveException.missingSource();
}
//Verification target and source, two use cases create warning or exception.
//1. If source is directory and target is jar -
// This will lead unkown outcome, user attempt to use this tool to pack outcome into a Jar.
// Warning message will be logged, this is can be workarounded by other utilities.
//2. Both source and target are specified as a same jar -
// User was tryint to perform waving in same Jar which is not support, Exception will be thrown.
if(isDirectory(source) && target.toURI().toString().endsWith(".jar")){
AbstractSessionLog.getLog().log(SessionLog.WARNING, ToStringLocalization.buildMessage("staticweave_processor_unknown_outcome", new Object[]{null}));
}
if(!isDirectory(source) && target.toString().equals(source.toString())){
throw StaticWeaveException.weaveInplaceForJar(source.toString());
}
//pre-create target if it is directory and dose not exsit.
//Using the method File.isDirectory() is not enough to determine what the type(dir or jar)
//of the target(specified by URL)that user want to create. File.isDirectory() will return false in
//two possibilities, the location either is not directory or the location dose not exist.
//Therefore pre-build of the directory target is required. Pre-build for the file(JAR) target
//is not required since it gets built automically by opening outputstream.
if(!(new File(target.toURI())).exists()){
if(!target.toURI().toString().endsWith(".jar")){
(new File(target.toURI())).mkdirs();
//if directory fails to build, which may leads to unknown outcome since it will
//be treated as single file in the class StaticWeaveHandler and automicatlly gets built
//by outputstream.
//re-assign URL.
target = (new File(target.toURI())).toURL();
}
}
| | private void | process()
//Instantiate output handler
AbstractStaticWeaveOutputHandler swoh;
if(isDirectory(this.target)){
swoh= new StaticWeaveDirectoryOutputHandler(this.source,this.target);
}else{
swoh= new StaticWeaveJAROutputHandler(new JarOutputStream(new FileOutputStream(new File(this.target.toURI()))));
}
//Instantiate classloader
this.classLoader = (this.classLoader == null)? Thread.currentThread().getContextClassLoader():this.classLoader;
this.classLoader = new URLClassLoader(getURLs(), this.classLoader);
//Instantiate the classtransformer, we check if the persistenceinfo URL has been specified.
StaticWeaveClassTransformer classTransformer=null;
if(persistenceInfo!=null){
classTransformer = new StaticWeaveClassTransformer(persistenceInfo, this.classLoader,this.logWriter,this.logLevel);
} else{
classTransformer = new StaticWeaveClassTransformer(source, this.classLoader,this.logWriter,this.logLevel);
}
//Starting process...
Archive sourceArchive =(new ArchiveFactoryImpl()).createArchive(source);
Iterator entries = sourceArchive.getEntries();
while (entries.hasNext()){
String entryName = (String)entries.next();
InputStream entryInputStream = sourceArchive.getEntry(entryName);
String className = PersistenceUnitProcessor.buildClassNameFromEntryString(entryName) ;
//Add a directory entry
swoh.addDirEntry(getDirectoryFromEntryName(entryName));
//Add a regular entry
JarEntry newEntry = new JarEntry(entryName);
byte[] originalClassBytes=null;
byte[] transferredClassBytes=null;
try {
Class thisClass = this.classLoader.loadClass(className);
//if the class is not in the classpath, we simply copy the entry
//to the target(no weaving).
if (thisClass == null){
swoh.addEntry(entryInputStream, newEntry);
continue;
}
//Try to read the loaded class bytes, the class bytes is required for
//classtransformer to perform transfer. Simply copy entry to the target(no weaving)
//if the class bytes can't be read.
InputStream is = this.classLoader.getResourceAsStream(entryName);
if (is!=null){
originalClassBytes = new byte[is.available()];
is.read(originalClassBytes);
}else{
swoh.addEntry(entryInputStream, newEntry);
continue;
}
//If everything is OK so far, we perform the weaving. we need three paramteres in order to
//class to perform weaving for that class, the class name,the class object and class bytes.
transferredClassBytes = classTransformer.transform(className.replace('.", '/"), thisClass, originalClassBytes);
//if transferredClassBytes is null means the class dose not get woven.
if(transferredClassBytes!=null){
swoh.addEntry(newEntry, transferredClassBytes);
} else{
swoh.addEntry(entryInputStream, newEntry);
}
} catch (IllegalClassFormatException e) {
//Anything went wrong, we need log a warning message, copy the entry to the target and
//process next entry.
swoh.addEntry(entryInputStream, newEntry);
continue;
} catch (ClassNotFoundException e){
swoh.addEntry(entryInputStream, newEntry);
continue;
}finally{
//need close the inputstream for current entry before processing next one.
entryInputStream.close();
}
}
swoh.closeOutputStream();
| | public void | setClassLoader(java.lang.ClassLoader classLoader)Set the user classloader.
this.classLoader=classLoader;
| | public void | setLog(java.io.Writer logWriter)The method allows user to specify the ouput for the log message.
this.logWriter= logWriter;
| | public void | setLogLevel(int level)The method allows user to define nine levels toplink logging.
this.logLevel=level;
| | public void | setPersistenceInfo(java.net.URL persistenceInfo)Set an explicitly identified URL of the location containing persistence.xml.
this.persistenceInfo = persistenceInfo;
| | public void | setPersistenceInfo(java.lang.String persistenceInfoPath)Set an explicitly identified the location containing persistence.xml.
if (persistenceInfoPath!=null){
this.persistenceInfo=new File(persistenceInfoPath).toURL();
}
| | public void | setPersistenceInfo(java.io.File persistenceInfoFile)Set an explicitly identified the location containing persistence.xml.
if (persistenceInfoFile!=null){
this.persistenceInfo=persistenceInfoFile.toURL();
}
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