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A doclet that generates a resourcedoc xml file: this file contains the javadoc documentation
of resource classes, so that this can be used for extending generated wadl with useful
documentation.
/*
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://jersey.dev.java.net/CDDL+GPL.html
* or jersey/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at jersey/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.jersey.wadl.resourcedoc;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.io.StringWriter;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.namespace.QName;
import org.apache.xml.serialize.OutputFormat;
import org.apache.xml.serialize.XMLSerializer;
import com.sun.javadoc.AnnotationDesc;
import com.sun.javadoc.ClassDoc;
import com.sun.javadoc.DocErrorReporter;
import com.sun.javadoc.MemberDoc;
import com.sun.javadoc.MethodDoc;
import com.sun.javadoc.ParamTag;
import com.sun.javadoc.Parameter;
import com.sun.javadoc.RootDoc;
import com.sun.javadoc.SeeTag;
import com.sun.javadoc.Tag;
import com.sun.javadoc.AnnotationDesc.ElementValuePair;
import com.sun.jersey.server.wadl.generators.resourcedoc.model.AnnotationDocType;
import com.sun.jersey.server.wadl.generators.resourcedoc.model.ClassDocType;
import com.sun.jersey.server.wadl.generators.resourcedoc.model.MethodDocType;
import com.sun.jersey.server.wadl.generators.resourcedoc.model.NamedValueType;
import com.sun.jersey.server.wadl.generators.resourcedoc.model.ParamDocType;
import com.sun.jersey.server.wadl.generators.resourcedoc.model.RepresentationDocType;
import com.sun.jersey.server.wadl.generators.resourcedoc.model.RequestDocType;
import com.sun.jersey.server.wadl.generators.resourcedoc.model.ResourceDocType;
import com.sun.jersey.server.wadl.generators.resourcedoc.model.ResponseDocType;
import com.sun.jersey.server.wadl.generators.resourcedoc.model.WadlParamType;
/**
* This doclet creates a resourcedoc xml file. The ResourceDoc file contains the javadoc documentation
* of resource classes, so that this can be used for extending generated wadl with useful
* documentation.
* Created on: Jun 7, 2008
*
* @author Martin Grotzke
* @version $Id: ResourceDoclet.java 1908 2009-02-03 00:20:29Z magrokosmos $
*/
public class ResourceDoclet {
private static final Pattern PATTERN_RESPONSE_REPRESENATION = Pattern.compile( "@response\\.representation\\.([\\d]+)\\..*" );
private static final String OPTION_OUTPUT = "-output";
private static final String OPTION_CLASSPATH = "-classpath";
private static final String OPTION_DOC_PROCESSORS = "-processors";
private static final Logger LOG = Logger.getLogger( ResourceDoclet.class
.getName() );
/**
* Start the doclet.
*
* @param root
* @return true if no exception is thrown
*/
public static boolean start( RootDoc root ) {
final String output = getOptionArg( root.options(), OPTION_OUTPUT );
final String classpath = getOptionArg( root.options(), OPTION_CLASSPATH );
// LOG.info( "Have classpatch: " + classpath );
final String[] classpathElements = classpath.split( ":" );
final ClassLoader cl = Thread.currentThread().getContextClassLoader();
final ClassLoader ncl = new Loader( classpathElements,
ResourceDoclet.class.getClassLoader() );
Thread.currentThread().setContextClassLoader( ncl );
final String docProcessorOption = getOptionArg( root.options(), OPTION_DOC_PROCESSORS );
final String[] docProcessors = docProcessorOption != null ? docProcessorOption.split( ":" ) : null;
final DocProcessorWrapper docProcessor = new DocProcessorWrapper();
try {
if ( docProcessors != null && docProcessors.length > 0 ) {
final Class clazz = Class.forName( docProcessors[0], true, Thread.currentThread().getContextClassLoader() );
final Class dpClazz = clazz.asSubclass( DocProcessor.class );
docProcessor.add( dpClazz.newInstance() );
}
} catch ( Exception e ) {
LOG.log( Level.SEVERE, "Could not load docProcessors " + docProcessorOption, e );
}
try {
final ResourceDocType result = new ResourceDocType();
final ClassDoc[] classes = root.classes();
for ( ClassDoc classDoc : classes ) {
LOG.fine( "Writing class " + classDoc.qualifiedTypeName() );
final ClassDocType classDocType = new ClassDocType();
classDocType.setClassName( classDoc.qualifiedTypeName() );
classDocType.setCommentText( classDoc.commentText() );
docProcessor.processClassDoc( classDoc, classDocType );
for ( MethodDoc methodDoc : classDoc.methods() ) {
final MethodDocType methodDocType = new MethodDocType();
methodDocType.setMethodName( methodDoc.name() );
methodDocType.setCommentText( methodDoc.commentText() );
docProcessor.processMethodDoc( methodDoc, methodDocType );
addParamDocs( methodDoc, methodDocType, docProcessor );
addRequestRepresentationDoc( methodDoc, methodDocType );
addResponseDoc( methodDoc, methodDocType );
classDocType.getMethodDocs().add( methodDocType );
}
result.getDocs().add( classDocType );
}
try {
final Class[] clazzes = getJAXBContextClasses( result, docProcessor );
final JAXBContext c = JAXBContext.newInstance( clazzes );
final Marshaller m = c.createMarshaller();
m.setProperty( Marshaller.JAXB_FORMATTED_OUTPUT, true );
final OutputStream out = new BufferedOutputStream( new FileOutputStream( output ) );
final String[] cdataElements = getCDataElements( docProcessor );
final XMLSerializer serializer = getXMLSerializer( out, cdataElements );
m.marshal( result, serializer );
out.close();
LOG.info( "Wrote " + output );
} catch (Exception e) {
LOG.log( Level.SEVERE, "Could not serialize ResourceDoc.", e );
return false;
}
} finally {
Thread.currentThread().setContextClassLoader( cl );
}
return true;
}
private static String[] getCDataElements( DocProcessor docProcessor ) {
final String[] original = new String[] { "ns1^commentText", "ns2^commentText", "^commentText" };
if ( docProcessor == null ) {
return original;
}
else {
final String[] cdataElements = docProcessor.getCDataElements();
if ( cdataElements == null || cdataElements.length == 0 ) {
return original;
}
else {
final String[] result = copyOf( original, original.length + cdataElements.length );
for ( int i = 0; i < cdataElements.length; i++ ) {
result[ original.length + i ] = cdataElements[i];
}
return result;
}
}
}
@SuppressWarnings("unchecked")
private static T[] copyOf( U[] original, int newLength ) {
final T[] copy = ((Object)original.getClass() == (Object)Object[].class)
? (T[]) new Object[newLength]
: (T[]) Array.newInstance(original.getClass().getComponentType(), newLength);
System.arraycopy(original, 0, copy, 0,
Math.min(original.length, newLength));
return copy;
}
private static Class[] getJAXBContextClasses(
final ResourceDocType result, DocProcessor docProcessor ) {
final Class[] clazzes;
if ( docProcessor == null ) {
clazzes = new Class[1];
}
else {
final Class[] requiredJaxbContextClasses = docProcessor.getRequiredJaxbContextClasses();
if ( requiredJaxbContextClasses != null ) {
clazzes = new Class[1 + requiredJaxbContextClasses.length ];
for ( int i = 0; i < requiredJaxbContextClasses.length; i++ ) {
clazzes[i + 1] = requiredJaxbContextClasses[i];
}
}
else {
clazzes = new Class[1];
}
}
clazzes[0] = result.getClass();
return clazzes;
}
private static XMLSerializer getXMLSerializer( OutputStream os, String[] cdataElements ) throws InstantiationException, IllegalAccessException, ClassNotFoundException {
// configure an OutputFormat to handle CDATA
OutputFormat of = new OutputFormat();
// specify which of your elements you want to be handled as CDATA.
// The use of the '^' between the namespaceURI and the localname
// seems to be an implementation detail of the xerces code.
// When processing xml that doesn't use namespaces, simply omit the
// namespace prefix as shown in the third CDataElement below.
of.setCDataElements( cdataElements );
// set any other options you'd like
of.setPreserveSpace(true);
of.setIndenting(true);
// create the serializer
XMLSerializer serializer = new XMLSerializer(of);
serializer.setOutputByteStream( os );
return serializer;
}
private static void addResponseDoc( MethodDoc methodDoc,
final MethodDocType methodDocType ) {
final ResponseDocType responseDoc = new ResponseDocType();
final Tag returnTag = getSingleTagOrNull( methodDoc, "return" );
if ( returnTag != null ) {
responseDoc.setReturnDoc( returnTag.text() );
}
final Tag[] responseParamTags = methodDoc.tags( "response.param" );
for ( Tag responseParamTag : responseParamTags ) {
// LOG.info( "Have responseparam tag: " + print( responseParamTag ) );
final WadlParamType wadlParam = new WadlParamType();
for ( Tag inlineTag : responseParamTag.inlineTags() ) {
final String tagName = inlineTag.name();
final String tagText = inlineTag.text();
/* skip empty tags
*/
if ( isEmpty( tagText ) ) {
if ( LOG.isLoggable( Level.FINE ) ) {
LOG.fine( "Skipping empty inline tag of @response.param in method " +
methodDoc.qualifiedName() + ": " + tagName );
}
continue;
}
if ( "@name".equals( tagName ) ) {
wadlParam.setName( tagText );
}
else if ( "@style".equals( tagName ) ) {
wadlParam.setStyle( tagText );
}
else if ( "@type".equals( tagName ) ) {
wadlParam.setType( QName.valueOf( tagText ) );
}
else if ( "@doc".equals( tagName ) ) {
wadlParam.setDoc( tagText );
}
else {
LOG.warning( "Unknown inline tag of @response.param in method " +
methodDoc.qualifiedName() + ": " + tagName +
" (value: " + tagText + ")" );
}
}
responseDoc.getWadlParams().add( wadlParam );
}
final Map> tagsByStatus = getResponseRepresentationTags( methodDoc );
for ( Entry> entry : tagsByStatus.entrySet() ) {
final RepresentationDocType representationDoc = new RepresentationDocType();
representationDoc.setStatus( Long.valueOf( entry.getKey() ) );
for ( Tag tag : entry.getValue() ) {
if ( tag.name().endsWith( ".qname" ) ) {
representationDoc.setElement( QName.valueOf( tag.text() ) );
}
else if ( tag.name().endsWith( ".mediaType" ) ) {
representationDoc.setMediaType( tag.text() );
}
else if ( tag.name().endsWith( ".example" ) ) {
representationDoc.setExample( getSerializedExample( tag ) );
}
else if ( tag.name().endsWith( ".doc" ) ) {
representationDoc.setDoc( tag.text() );
}
else {
LOG.warning( "Unknown response representation tag " + tag.name() );
}
}
responseDoc.getRepresentations().add( representationDoc );
}
methodDocType.setResponseDoc( responseDoc );
}
private static boolean isEmpty( String value ) {
return value == null || value.length() == 0 || value.trim().length() == 0 ? true : false;
}
private static void addRequestRepresentationDoc( MethodDoc methodDoc,
final MethodDocType methodDocType ) {
final Tag requestElement = getSingleTagOrNull( methodDoc, "request.representation.qname" );
final Tag requestExample = getSingleTagOrNull( methodDoc, "request.representation.example" );
if ( requestElement != null || requestExample != null ) {
final RequestDocType requestDoc = new RequestDocType();
final RepresentationDocType representationDoc = new RepresentationDocType();
/* requestElement exists
*/
if ( requestElement != null ) {
representationDoc.setElement( QName.valueOf( requestElement.text() ) );
}
/* requestExample exists
*/
if ( requestExample != null ) {
final String example = getSerializedExample( requestExample );
if ( !isEmpty( example ) ) {
representationDoc.setExample( example );
}
else {
LOG.warning( "Could not get serialized example for method " + methodDoc.qualifiedName() );
}
}
requestDoc.setRepresentationDoc( representationDoc );
methodDocType.setRequestDoc( requestDoc );
}
}
private static Map> getResponseRepresentationTags(
MethodDoc methodDoc ) {
final Map> tagsByStatus = new HashMap>();
for ( Tag tag : methodDoc.tags() ) {
final Matcher matcher = PATTERN_RESPONSE_REPRESENATION.matcher( tag.name() );
if ( matcher.matches() ) {
final String status = matcher.group( 1 );
List tags = tagsByStatus.get( status );
if ( tags == null ) {
tags = new ArrayList();
tagsByStatus.put( status, tags );
}
tags.add( tag );
}
}
return tagsByStatus;
}
/**
* Searches an @link tag within the inline tags of the specified tags
* and serializes the referenced instance.
* @param tag
* @return
* @author Martin Grotzke
*/
private static String getSerializedExample( Tag tag ) {
if ( tag != null ) {
final Tag[] inlineTags = tag.inlineTags();
if ( inlineTags != null && inlineTags.length > 0 ) {
for ( Tag inlineTag : inlineTags ) {
if ( LOG.isLoggable( Level.FINE ) ) {
LOG.fine( "Have inline tag: " + print( inlineTag ) );
}
if ( "@link".equals( inlineTag.name() ) ) {
if ( LOG.isLoggable( Level.FINE ) ) {
LOG.fine( "Have link: " + print( inlineTag ) );
}
final SeeTag linkTag = (SeeTag) inlineTag;
return getSerializedLinkFromTag( linkTag );
}
else if ( !isEmpty( inlineTag.text() ) ) {
return inlineTag.text();
}
}
}
else {
LOG.fine( "Have example: " + print( tag ) );
return tag.text();
}
}
return null;
}
private static Tag getSingleTagOrNull( MethodDoc methodDoc, String tagName ) {
final Tag[] tags = methodDoc.tags( tagName );
if ( tags != null && tags.length == 1 ) {
return tags[0];
}
return null;
}
private static void addParamDocs( MethodDoc methodDoc,
final MethodDocType methodDocType,
final DocProcessor docProcessor ) {
final Parameter[] parameters = methodDoc.parameters();
final ParamTag[] paramTags = methodDoc.paramTags();
/* only use both javadoc and reflection information when the number
* of params are the same
*/
if ( parameters != null && paramTags != null
&& parameters.length == paramTags.length ) {
for ( int i = 0; i < parameters.length; i++ ) {
final Parameter parameter = parameters[i];
/* TODO: this only works if the params and tags are in the same
* order. If the param tags are mixed up, the comments for parameters
* will be wrong.
*/
final ParamTag paramTag = paramTags[i];
final ParamDocType paramDocType = new ParamDocType();
paramDocType.setParamName( paramTag.parameterName() );
paramDocType.setCommentText( paramTag.parameterComment() );
docProcessor.processParamTag( paramTag, parameter, paramDocType );
AnnotationDesc[] annotations = parameter.annotations();
if ( annotations != null ) {
for ( AnnotationDesc annotationDesc : annotations ) {
final AnnotationDocType annotationDocType = new AnnotationDocType();
final String typeName = annotationDesc.annotationType().qualifiedName();
annotationDocType.setAnnotationTypeName( typeName );
for ( ElementValuePair elementValuePair : annotationDesc.elementValues() ) {
final NamedValueType namedValueType = new NamedValueType();
namedValueType.setName( elementValuePair.element().name() );
namedValueType.setValue( elementValuePair.value().value().toString() );
annotationDocType.getAttributeDocs().add( namedValueType );
}
paramDocType.getAnnotationDocs().add( annotationDocType );
}
}
methodDocType.getParamDocs().add( paramDocType );
}
}
}
private static String getSerializedLinkFromTag( final SeeTag linkTag ) {
final MemberDoc referencedMember = linkTag.referencedMember();
if ( referencedMember == null ) {
throw new NullPointerException( "Referenced member of @link "+ print( linkTag ) +" cannot be resolved." );
}
if ( !referencedMember.isStatic() ) {
LOG.warning( "Referenced member of @link "+ print( linkTag ) +" is not static." +
" Right now only references to static members are supported." );
return null;
}
/* Get referenced example bean
*/
final ClassDoc containingClass = referencedMember.containingClass();
final Object object;
try {
Field declaredField = Class.forName( containingClass.qualifiedName(), false, Thread.currentThread().getContextClassLoader() ).getDeclaredField( referencedMember.name() );
if ( referencedMember.isFinal() ) {
declaredField.setAccessible( true );
}
object = declaredField.get( null );
LOG.log( Level.FINE, "Got object " + object );
} catch ( Exception e ) {
LOG.info( "Have classloader: " + ResourceDoclet.class.getClassLoader().getClass() );
LOG.info( "Have thread classloader " + Thread.currentThread().getContextClassLoader().getClass() );
LOG.info( "Have system classloader " + ClassLoader.getSystemClassLoader().getClass() );
LOG.log( Level.SEVERE, "Could not get field " + referencedMember.qualifiedName(), e );
return null;
}
/* marshal the bean to xml
*/
try {
final JAXBContext jaxbContext = JAXBContext.newInstance( object.getClass() );
final StringWriter stringWriter = new StringWriter();
final Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty( Marshaller.JAXB_FORMATTED_OUTPUT, true );
marshaller.marshal( object, stringWriter );
final String result = stringWriter.getBuffer().toString();
LOG.log( Level.FINE, "Got marshalled output:\n" + result );
return result;
} catch ( Exception e ) {
LOG.log( Level.SEVERE, "Could serialize bean to xml: " + object, e );
return null;
}
}
private static String print( Tag tag ) {
final StringBuilder sb = new StringBuilder();
sb.append( tag.getClass() ).append( "[" );
sb.append( "firstSentenceTags=" ).append( toCSV( tag.firstSentenceTags() ) );
sb.append( ", inlineTags=" ).append( toCSV( tag.inlineTags() ) );
sb.append( ", kind=" ).append( tag.kind() );
sb.append( ", name=" ).append( tag.name() );
sb.append( ", text=" ).append( tag.text() );
sb.append( "]" );
return sb.toString();
}
static String toCSV( Tag[] items ) {
if ( items == null ) {
return null;
}
return toCSV( Arrays.asList( items ) );
}
static String toCSV( Collection items ) {
return toCSV( items, ", ", null );
}
static String toCSV( Collection items, String separator, String delimiter ) {
if ( items == null ) {
return null;
}
if ( items.isEmpty() ) {
return "";
}
final StringBuilder sb = new StringBuilder();
for ( final Iterator iter = items.iterator(); iter.hasNext(); ) {
if ( delimiter != null ) {
sb.append( delimiter );
}
final Tag item = iter.next();
sb.append( item.name() );
if ( delimiter != null ) {
sb.append( delimiter );
}
if ( iter.hasNext() ) {
sb.append( separator );
}
}
return sb.toString();
}
/**
* Return array length for given option: 1 + the number of arguments that
* the option takes.
*
* @param option
* @return the number of args for the specified option
*/
public static int optionLength( String option ) {
LOG.fine( "Invoked with option " + option );
if ( OPTION_OUTPUT.equals( option )
|| OPTION_CLASSPATH.equals( option )
|| OPTION_DOC_PROCESSORS.equals( option ) ) {
return 2;
}
return 0;
}
/**
* Validate options.
*
* @param options
* @param reporter
* @return if the specified options are valid
*/
public static boolean validOptions( String[][] options, DocErrorReporter reporter ) {
return validOption( OPTION_OUTPUT, "", options, reporter )
&& validOption( OPTION_CLASSPATH, "", options, reporter );
}
private static boolean validOption( String optionName,
String reportOptionName,
String[][] options,
DocErrorReporter reporter ) {
final String option = getOptionArg( options, optionName );
final boolean foundOption = option != null && option.trim().length() > 0;
if ( !foundOption ) {
reporter.printError( optionName + " "+ reportOptionName +" must be specified." );
}
return foundOption;
}
private static String getOptionArg( String[][] options, String option ) {
for ( int i = 0; i < options.length; i++ ) {
String[] opt = options[i];
if ( opt[0].equals( option ) ) {
return opt[1];
}
}
return null;
}
static class Loader extends URLClassLoader {
public Loader(String[] paths, ClassLoader parent) {
super(getURLs(paths), parent);
}
Loader(String[] paths) {
super(getURLs(paths));
}
private static URL[] getURLs(String[] paths) {
final List urls = new ArrayList();
for (String path: paths) {
try {
urls.add(new File(path).toURI().toURL());
} catch (MalformedURLException e) {
throw new RuntimeException(e);
}
}
final URL[] us = urls.toArray(new URL[0]);
return us;
}
}
}
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