Examples of org.apache.excalibur.source.Source

org.apache.excalibur.source.Source
This interface provides a simple interface for accessing a source of data.
When the Source object is no longer needed it must be released using the {@link SourceResolver}. This is very similar to looking up components from a ServiceSelector. In fact a source object can implement most lifecycle interfaces like Composable, Initializable, Disposable etc.
The data content can be constant or change over time. Using the {@link #getInputStream()} method you get always the up-to-date content.
If you want to track changes of the source object, this interface offers you some support for it by providing a SourceValidity object.
How does the caching work? The first time you get a Source object, you simply ask it for it's content via getInputStream() and then get the validity object by invoking getValidity. (Further calls to getValidity always return the same object! This is not updated!) The caching algorithm can now store this validity object together with the system identifier of the source. The next time, the caching algorithm wants to check if the cached content is still valid. It has a validity object already to check against.
If it is still the same Source than the first time, you have to call refresh() in order to discard the stored validity in the Source object. If it is a new Source object, calling refresh() should do no harm. After that an up-to-date validity object can retrieved by calling getValidity(). This can be used to test if the content is still valid as discribed in the source validity documentation. If the content is still valid, the cache knows what to do, if not, the new content can be get using getInputStream(). So either after a call to getValidity() or the getInputStream the validity object must be the same until refresh is called! @author Avalon Development Team @version CVS $Revision: 1.4 $ $Date: 2004/02/28 11:47:26 $


        ComponentSelector selector = null;
        Transformer transformer = null;
        SourceResolver resolver = null;
        SAXParser parser = null;
        Source inputsource = null;


        Document document = null;
        try {
            selector = (ComponentSelector) this.manager.lookup(Transformer.ROLE+
                "Selector");

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    public final Document load(String source) {


        SourceResolver resolver = null;
        SAXParser parser = null;
        Source assertionsource = null;


        Document assertiondocument = null;
        try {
            resolver = (SourceResolver) this.manager.lookup(SourceResolver.ROLE);
            assertNotNull("Test lookup of source resolver", resolver);


            parser = (SAXParser) this.manager.lookup(SAXParser.ROLE);
            assertNotNull("Test lookup of parser", parser);


            assertNotNull("Test if assertion document is not null",
                          source);
            assertionsource = resolver.resolveURI(source);
            assertNotNull("Test lookup of assertion source",
                          assertionsource);


            DOMBuilder builder = new DOMBuilder();
            assertNotNull("Test if inputstream of the assertion source is not null",
                          assertionsource.getInputStream());


            parser.parse(new InputSource(assertionsource.getInputStream()),
                         new WhitespaceFilter(builder),
                         builder);


            assertiondocument = builder.getDocument();
            assertNotNull("Test if assertion document exists", assertiondocument);

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  throws ProcessingException, SAXException, IOException
  {
    super.setup(resolver, objectModel, src, par);
    
    try {
        Source inputSource = resolver.resolveURI(super.source);
        this.source = inputSource.getURI();
    } catch (SourceException se) {
        throw SourceUtil.handle("Unable to resolve " + super.source, se);
    }    
     
    configuredHttpMethod = par.getParameter("wsproxy-method", METHOD_GET);

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     *      filesystem
     */
    public void generate()
    throws SAXException, ProcessingException {
        String directory = super.source;
        Source inputSource = null;
        try {
            inputSource = this.resolver.resolveURI(directory);
            String systemId = inputSource.getURI();
            if (!systemId.startsWith(FILE)) {
              throw new ResourceNotFoundException(systemId + " does not denote a directory");
            }
            // This relies on systemId being of the form "file://..."
            File directoryFile = new File(new URL(systemId).getFile());

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        if (src != null && serializerType != null) {
            throw new SAXException(
                "Cannot specify both 'src' and 'serializer' on a Zip entry '" + name + "'");
        }


        Source source = null;
        try {
            // Create a new Zip entry
            ZipEntry entry = new ZipEntry(name);
            this.zipOutput.putNextEntry(entry);


            if (src != null) {
                // Get the source and its data
                source = resolver.resolveURI(src);
                InputStream sourceInput = source.getInputStream();


                // Copy the source to the zip
                int len;
                while ((len = sourceInput.read(this.buffer)) > 0) {
                    this.zipOutput.write(this.buffer, 0, len);

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        if (fragment == null) {
            throw new ProcessingException("insertFragment: fragment is required.");
        }


        // first: read the source as a DOM
        Source source = null;
        Document resource = null;
        boolean failed = true;
        boolean exists = false;
        String message = "";
        String target = systemID;
        try {
            source = this.resolver.resolveURI( systemID );
            if ( ! (source instanceof ModifiableSource)) {
                throw new ProcessingException("Source '"+systemID+"' is not writeable.");
            }
            ModifiableSource ws = (ModifiableSource)source;
            exists = ws.exists();
            target = source.getURI();
            if ( exists == true && this.state == STATE_INSERT ) {
                                message = "content inserted at: " + path;
                resource = SourceUtil.toDOM( source );
                // import the fragment
                Node importNode = resource.importNode(fragment, true);

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        ComponentSelector selector = null;
        Generator generator = null;
        SourceResolver resolver = null;
        SAXParser parser = null;
        Source assertionsource = null;


        Document document = null;
        try {
            selector = (ComponentSelector) this.manager.lookup(Generator.ROLE +
                "Selector");

View Full Code Here


        ComponentSelector selector = null;
        Transformer transformer = null;
        SourceResolver resolver = null;
        SAXParser parser = null;
        Source inputsource = null;


        Document document = null;
        try {
            selector = (ComponentSelector) this.manager.lookup(Transformer.ROLE+
                "Selector");

View Full Code Here


    public final Document load(String source) {


        SourceResolver resolver = null;
        SAXParser parser = null;
        Source assertionsource = null;


        Document assertiondocument = null;
        try {
            resolver = (SourceResolver) this.manager.lookup(SourceResolver.ROLE);
            assertNotNull("Test lookup of source resolver", resolver);


            parser = (SAXParser) this.manager.lookup(SAXParser.ROLE);
            assertNotNull("Test lookup of parser", parser);


            assertNotNull("Test if assertion document is not null",
                          source);
            assertionsource = resolver.resolveURI(source);
            assertNotNull("Test lookup of assertion source",
                          assertionsource);
            assertTrue("Test if source exist", assertionsource.exists());


            DOMBuilder builder = new DOMBuilder();
            assertNotNull("Test if inputstream of the assertion source is not null",
                          assertionsource.getInputStream());


            parser.parse(new InputSource(assertionsource.getInputStream()),
                         new WhitespaceFilter(builder),
                         builder);


            assertiondocument = builder.getDocument();
            assertNotNull("Test if assertion document exists", assertiondocument);

View Full Code Here


        ComponentSelector selector = null;
        Generator generator = null;
        SourceResolver resolver = null;
        SAXParser parser = null;
        Source assertionsource = null;


        Document document = null;
        try {
            selector = (ComponentSelector) this.manager.lookup(Generator.ROLE +
                "Selector");

View Full Code Here

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