123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381 |
- /*******************************************************************************
- * Copyright (c) 2005 Contributors.
- * All rights reserved.
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Public License v1.0
- * which accompanies this distribution and is available at
- * http://eclipse.org/legal/epl-v10.html
- *
- * Contributors:
- * Alexandre Vasseur initial implementation
- * Abraham Nevado - Lucierna simple caching strategy
- *******************************************************************************/
- package org.aspectj.weaver.loadtime.definition;
-
- import java.io.IOException;
- import java.io.InputStream;
- import java.net.URL;
- import java.util.Hashtable;
-
- import javax.xml.parsers.ParserConfigurationException;
- import javax.xml.parsers.SAXParserFactory;
-
- import org.aspectj.util.LangUtil;
- import org.aspectj.weaver.loadtime.definition.Definition.AdviceKind;
- import org.aspectj.weaver.loadtime.definition.Definition.DeclareAnnotationKind;
- import org.xml.sax.Attributes;
- import org.xml.sax.InputSource;
- import org.xml.sax.SAXException;
- import org.xml.sax.SAXParseException;
- import org.xml.sax.XMLReader;
- import org.xml.sax.helpers.DefaultHandler;
- import org.xml.sax.helpers.XMLReaderFactory;
-
- /**
- *
- * @author Alexandre Vasseur
- * @author A. Nevado
- * @author Andy Clement
- */
- public class DocumentParser extends DefaultHandler {
- /**
- * The current DTD public id. The matching dtd will be searched as a resource.
- */
- private final static String DTD_PUBLIC_ID = "-//AspectJ//DTD 1.5.0//EN";
-
- /**
- * The DTD alias, for better user experience.
- */
- private final static String DTD_PUBLIC_ID_ALIAS = "-//AspectJ//DTD//EN";
-
- private final static String ASPECTJ_ELEMENT = "aspectj";
- private final static String WEAVER_ELEMENT = "weaver";
- private final static String DUMP_ELEMENT = "dump";
- private final static String DUMP_BEFOREANDAFTER_ATTRIBUTE = "beforeandafter";
- private final static String DUMP_PERCLASSLOADERDIR_ATTRIBUTE = "perclassloaderdumpdir";
- private final static String INCLUDE_ELEMENT = "include";
- private final static String EXCLUDE_ELEMENT = "exclude";
- private final static String OPTIONS_ATTRIBUTE = "options";
- private final static String ASPECTS_ELEMENT = "aspects";
- private final static String ASPECT_ELEMENT = "aspect";
- private final static String CONCRETE_ASPECT_ELEMENT = "concrete-aspect";
- private final static String NAME_ATTRIBUTE = "name";
- private final static String SCOPE_ATTRIBUTE = "scope";
- private final static String REQUIRES_ATTRIBUTE = "requires";
- private final static String EXTEND_ATTRIBUTE = "extends";
- private final static String PRECEDENCE_ATTRIBUTE = "precedence";
- private final static String PERCLAUSE_ATTRIBUTE = "perclause";
- private final static String POINTCUT_ELEMENT = "pointcut";
- private final static String BEFORE_ELEMENT = "before";
- private final static String AFTER_ELEMENT = "after";
- private final static String AFTER_RETURNING_ELEMENT = "after-returning";
- private final static String AFTER_THROWING_ELEMENT = "after-throwing";
- private final static String AROUND_ELEMENT = "around";
- private final static String WITHIN_ATTRIBUTE = "within";
- private final static String EXPRESSION_ATTRIBUTE = "expression";
- private final static String DECLARE_ANNOTATION_ELEMENT = "declare-annotation";
-
- private final Definition definition;
-
- private boolean inAspectJ;
- private boolean inWeaver;
- private boolean inAspects;
-
- private Definition.ConcreteAspect activeConcreteAspectDefinition;
-
- private static Hashtable<String, Definition> parsedFiles = new Hashtable<String, Definition>();
- private static boolean CACHE;
- private static final boolean LIGHTPARSER;
-
- static {
- boolean value = false;
- try {
- value = System.getProperty("org.aspectj.weaver.loadtime.configuration.cache", "true").equalsIgnoreCase("true");
- } catch (Throwable t) {
- t.printStackTrace();
- }
- CACHE = value;
-
- value = false;
- try {
- value = System.getProperty("org.aspectj.weaver.loadtime.configuration.lightxmlparser", "false")
- .equalsIgnoreCase("true");
- } catch (Throwable t) {
- t.printStackTrace();
- }
- LIGHTPARSER = value;
- }
-
- private DocumentParser() {
- definition = new Definition();
- }
-
- public static Definition parse(final URL url) throws Exception {
- if (CACHE && parsedFiles.containsKey(url.toString())) {
- return parsedFiles.get(url.toString());
- }
- Definition def = null;
-
- if (LIGHTPARSER) {
- def = SimpleAOPParser.parse(url);
- } else {
- def = saxParsing(url);
- }
-
- if (CACHE && def.getAspectClassNames().size() > 0) {
- parsedFiles.put(url.toString(), def);
- }
-
- return def;
- }
-
- private static Definition saxParsing(URL url) throws SAXException, ParserConfigurationException, IOException {
- DocumentParser parser = new DocumentParser();
-
- XMLReader xmlReader = getXMLReader();
- xmlReader.setContentHandler(parser);
- xmlReader.setErrorHandler(parser);
-
- try {
- xmlReader.setFeature("http://xml.org/sax/features/validation", false);
- } catch (SAXException e) {
- // fine, the parser don't do validation
- }
- try {
- xmlReader.setFeature("http://xml.org/sax/features/external-general-entities", false);
- } catch (SAXException e) {
- // fine, the parser don't do validation
- }
- try {
- xmlReader.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
- } catch (SAXException e) {
- // fine, the parser don't do validation
- }
-
- xmlReader.setEntityResolver(parser);
- InputStream in = url.openStream();
- xmlReader.parse(new InputSource(in));
- return parser.definition;
- }
-
- private static XMLReader getXMLReader() throws SAXException, ParserConfigurationException {
- XMLReader xmlReader = null;
- /* Try this first for Java 5 */
- try {
- xmlReader = XMLReaderFactory.createXMLReader();
- }
-
- /* .. and ignore "System property ... not set" and then try this instead */
- catch (SAXException ex) {
- xmlReader = SAXParserFactory.newInstance().newSAXParser().getXMLReader();
- }
- return xmlReader;
- }
-
- public InputSource resolveEntity(String publicId, String systemId) throws SAXException {
- if (publicId.equals(DTD_PUBLIC_ID) || publicId.equals(DTD_PUBLIC_ID_ALIAS)) {
- InputStream in = DocumentParser.class.getResourceAsStream("/aspectj_1_5_0.dtd");
- if (in == null) {
- System.err.println("AspectJ - WARN - could not read DTD " + publicId);
- return null;
- } else {
- return new InputSource(in);
- }
- } else {
- System.err.println("AspectJ - WARN - unknown DTD " + publicId + " - consider using " + DTD_PUBLIC_ID);
- return null;
- }
- }
-
- public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
- if (ASPECT_ELEMENT.equals(qName)) {
- String name = attributes.getValue(NAME_ATTRIBUTE);
- String scopePattern = replaceXmlAnd(attributes.getValue(SCOPE_ATTRIBUTE));
- String requiredType = attributes.getValue(REQUIRES_ATTRIBUTE);
- if (!isNull(name)) {
- definition.getAspectClassNames().add(name);
- if (scopePattern != null) {
- definition.addScopedAspect(name, scopePattern);
- }
- if (requiredType != null) {
- definition.setAspectRequires(name, requiredType);
- }
- }
- } else if (WEAVER_ELEMENT.equals(qName)) {
- String options = attributes.getValue(OPTIONS_ATTRIBUTE);
- if (!isNull(options)) {
- definition.appendWeaverOptions(options);
- }
- inWeaver = true;
- } else if (CONCRETE_ASPECT_ELEMENT.equals(qName)) {
- String name = attributes.getValue(NAME_ATTRIBUTE);
- String extend = attributes.getValue(EXTEND_ATTRIBUTE);
- String precedence = attributes.getValue(PRECEDENCE_ATTRIBUTE);
- String perclause = attributes.getValue(PERCLAUSE_ATTRIBUTE);
- if (!isNull(name)) {
- activeConcreteAspectDefinition = new Definition.ConcreteAspect(name, extend, precedence, perclause);
- // if (isNull(precedence) && !isNull(extend)) {// if no precedence, then extends must be there
- // m_lastConcreteAspect = new Definition.ConcreteAspect(name, extend);
- // } else if (!isNull(precedence)) {
- // // wether a pure precedence def, or an extendsANDprecedence def.
- // m_lastConcreteAspect = new Definition.ConcreteAspect(name, extend, precedence, perclause);
- // }
- definition.getConcreteAspects().add(activeConcreteAspectDefinition);
- }
- } else if (POINTCUT_ELEMENT.equals(qName) && activeConcreteAspectDefinition != null) {
- String name = attributes.getValue(NAME_ATTRIBUTE);
- String expression = attributes.getValue(EXPRESSION_ATTRIBUTE);
- if (!isNull(name) && !isNull(expression)) {
- activeConcreteAspectDefinition.pointcuts.add(new Definition.Pointcut(name, replaceXmlAnd(expression)));
- }
- } else if (DECLARE_ANNOTATION_ELEMENT.equals(qName) && activeConcreteAspectDefinition!=null) {
- String methodSig = attributes.getValue("method");
- String fieldSig = attributes.getValue("field");
- String typePat = attributes.getValue("type");
- String anno = attributes.getValue("annotation");
- if (isNull(anno)) {
- throw new SAXException("Badly formed <declare-annotation> element, 'annotation' value is missing");
- }
- if (isNull(methodSig) && isNull(fieldSig) && isNull(typePat)) {
- throw new SAXException("Badly formed <declare-annotation> element, need one of 'method'/'field'/'type' specified");
- }
- if (!isNull(methodSig)) {
- // declare @method
- activeConcreteAspectDefinition.declareAnnotations.add(new Definition.DeclareAnnotation(DeclareAnnotationKind.Method,
- methodSig, anno));
- } else if (!isNull(fieldSig)) {
- // declare @field
- activeConcreteAspectDefinition.declareAnnotations.add(new Definition.DeclareAnnotation(DeclareAnnotationKind.Field,
- fieldSig, anno));
- } else if (!isNull(typePat)) {
- // declare @type
- activeConcreteAspectDefinition.declareAnnotations.add(new Definition.DeclareAnnotation(DeclareAnnotationKind.Type,
- typePat, anno));
- }
- } else if (BEFORE_ELEMENT.equals(qName) && activeConcreteAspectDefinition != null) {
- String pointcut = attributes.getValue(POINTCUT_ELEMENT);
- String adviceClass = attributes.getValue("invokeClass");
- String adviceMethod = attributes.getValue("invokeMethod");
- if (!isNull(pointcut) && !isNull(adviceClass) && !isNull(adviceMethod)) {
- activeConcreteAspectDefinition.pointcutsAndAdvice.add(new Definition.PointcutAndAdvice(AdviceKind.Before,
- replaceXmlAnd(pointcut), adviceClass, adviceMethod));
- } else {
- throw new SAXException("Badly formed <before> element");
- }
- } else if (AFTER_ELEMENT.equals(qName) && activeConcreteAspectDefinition != null) {
- String pointcut = attributes.getValue(POINTCUT_ELEMENT);
- String adviceClass = attributes.getValue("invokeClass");
- String adviceMethod = attributes.getValue("invokeMethod");
- if (!isNull(pointcut) && !isNull(adviceClass) && !isNull(adviceMethod)) {
- activeConcreteAspectDefinition.pointcutsAndAdvice.add(new Definition.PointcutAndAdvice(AdviceKind.After,
- replaceXmlAnd(pointcut), adviceClass, adviceMethod));
- } else {
- throw new SAXException("Badly formed <after> element");
- }
- } else if (AROUND_ELEMENT.equals(qName) && activeConcreteAspectDefinition != null) {
- String pointcut = attributes.getValue(POINTCUT_ELEMENT);
- String adviceClass = attributes.getValue("invokeClass");
- String adviceMethod = attributes.getValue("invokeMethod");
- if (!isNull(pointcut) && !isNull(adviceClass) && !isNull(adviceMethod)) {
- activeConcreteAspectDefinition.pointcutsAndAdvice.add(new Definition.PointcutAndAdvice(AdviceKind.Around,
- replaceXmlAnd(pointcut), adviceClass, adviceMethod));
- } else {
- throw new SAXException("Badly formed <before> element");
- }
- } else if (ASPECTJ_ELEMENT.equals(qName)) {
- if (inAspectJ) {
- throw new SAXException("Found nested <aspectj> element");
- }
- inAspectJ = true;
- } else if (ASPECTS_ELEMENT.equals(qName)) {
- inAspects = true;
- } else if (INCLUDE_ELEMENT.equals(qName) && inWeaver) {
- String typePattern = getWithinAttribute(attributes);
- if (!isNull(typePattern)) {
- definition.getIncludePatterns().add(typePattern);
- }
- } else if (EXCLUDE_ELEMENT.equals(qName) && inWeaver) {
- String typePattern = getWithinAttribute(attributes);
- if (!isNull(typePattern)) {
- definition.getExcludePatterns().add(typePattern);
- }
- } else if (DUMP_ELEMENT.equals(qName) && inWeaver) {
- String typePattern = getWithinAttribute(attributes);
- if (!isNull(typePattern)) {
- definition.getDumpPatterns().add(typePattern);
- }
- String beforeAndAfter = attributes.getValue(DUMP_BEFOREANDAFTER_ATTRIBUTE);
- if (isTrue(beforeAndAfter)) {
- definition.setDumpBefore(true);
- }
- String perWeaverDumpDir = attributes.getValue(DUMP_PERCLASSLOADERDIR_ATTRIBUTE);
- if (isTrue(perWeaverDumpDir)) {
- definition.setCreateDumpDirPerClassloader(true);
- }
- } else if (EXCLUDE_ELEMENT.equals(qName) && inAspects) {
- String typePattern = getWithinAttribute(attributes);
- if (!isNull(typePattern)) {
- definition.getAspectExcludePatterns().add(typePattern);
- }
- } else if (INCLUDE_ELEMENT.equals(qName) && inAspects) {
- String typePattern = getWithinAttribute(attributes);
- if (!isNull(typePattern)) {
- definition.getAspectIncludePatterns().add(typePattern);
- }
- } else {
- throw new SAXException("Unknown element while parsing <aspectj> element: " + qName);
- }
- super.startElement(uri, localName, qName, attributes);
- }
-
- private String getWithinAttribute(Attributes attributes) {
- return replaceXmlAnd(attributes.getValue(WITHIN_ATTRIBUTE));
- }
-
- public void endElement(String uri, String localName, String qName) throws SAXException {
- if (CONCRETE_ASPECT_ELEMENT.equals(qName)) {
- activeConcreteAspectDefinition = null;
- } else if (ASPECTJ_ELEMENT.equals(qName)) {
- inAspectJ = false;
- } else if (WEAVER_ELEMENT.equals(qName)) {
- inWeaver = false;
- } else if (ASPECTS_ELEMENT.equals(qName)) {
- inAspects = false;
- }
- super.endElement(uri, localName, qName);
- }
-
- // TODO AV - define what we want for XML parser error - for now stderr
- public void warning(SAXParseException e) throws SAXException {
- super.warning(e);
- }
-
- public void error(SAXParseException e) throws SAXException {
- super.error(e);
- }
-
- public void fatalError(SAXParseException e) throws SAXException {
- super.fatalError(e);
- }
-
- private static String replaceXmlAnd(String expression) {
- // TODO AV do we need to handle "..)AND" or "AND(.." ?
- return LangUtil.replace(expression, " AND ", " && ");
- }
-
- private boolean isNull(String s) {
- return (s == null || s.length() <= 0);
- }
-
- private boolean isTrue(String s) {
- return (s != null && s.equals("true"));
- }
-
- /**
- * Turn off caching
- */
- public static void deactivateCaching() {
- CACHE = false;
- }
-
- }
|