001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common Development
008: * and Distribution License("CDDL") (collectively, the "License"). You
009: * may not use this file except in compliance with the License. You can obtain
010: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
011: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
012: * language governing permissions and limitations under the License.
013: *
014: * When distributing the software, include this License Header Notice in each
015: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
016: * Sun designates this particular file as subject to the "Classpath" exception
017: * as provided by Sun in the GPL Version 2 section of the License file that
018: * accompanied this code. If applicable, add the following below the License
019: * Header, with the fields enclosed by brackets [] replaced by your own
020: * identifying information: "Portions Copyrighted [year]
021: * [name of copyright owner]"
022: *
023: * Contributor(s):
024: *
025: * If you wish your version of this file to be governed by only the CDDL or
026: * only the GPL Version 2, indicate your decision by adding "[Contributor]
027: * elects to include this software in this distribution under the [CDDL or GPL
028: * Version 2] license." If you don't indicate a single choice of license, a
029: * recipient has the option to distribute your version of this file under
030: * either the CDDL, the GPL Version 2 or to extend the choice of license to
031: * its licensees as provided above. However, if you add GPL Version 2 code
032: * and therefore, elected the GPL Version 2 license, then the option applies
033: * only if the new code is made subject to such option by the copyright
034: * holder.
035: */
036: package com.sun.tools.xjc.reader.internalizer;
037:
038: import java.io.IOException;
039: import java.io.File;
040: import java.net.URI;
041: import java.net.URISyntaxException;
042:
043: import com.sun.istack.SAXParseException2;
044:
045: import org.xml.sax.Attributes;
046: import org.xml.sax.Locator;
047: import org.xml.sax.SAXException;
048: import org.xml.sax.SAXParseException;
049: import org.xml.sax.helpers.XMLFilterImpl;
050:
051: /**
052: * XMLFilter that finds references to other schema files from
053: * SAX events.
054: *
055: * This implementation is a base implementation for typical case
056: * where we just need to look for a particular attribute which
057: * contains an URL to another schema file.
058: *
059: * @author
060: * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
061: */
062: public abstract class AbstractReferenceFinderImpl extends XMLFilterImpl {
063: protected final DOMForest parent;
064:
065: protected AbstractReferenceFinderImpl(DOMForest _parent) {
066: this .parent = _parent;
067: }
068:
069: /**
070: * IF the given element contains a reference to an external resource,
071: * return its URL.
072: *
073: * @param nsURI
074: * Namespace URI of the current element
075: * @param localName
076: * Local name of the current element
077: * @return
078: * It's OK to return a relative URL.
079: */
080: protected abstract String findExternalResource(String nsURI,
081: String localName, Attributes atts);
082:
083: public void startElement(String namespaceURI, String localName,
084: String qName, Attributes atts) throws SAXException {
085: super .startElement(namespaceURI, localName, qName, atts);
086:
087: String relativeRef = findExternalResource(namespaceURI,
088: localName, atts);
089: if (relativeRef == null)
090: return; // non found
091:
092: try {
093: // absolutize URL.
094: String ref = new URI(locator.getSystemId()).resolve(
095: new URI(relativeRef)).toString();
096:
097: // then parse this schema as well,
098: // but don't mark this document as a root.
099: parent.parse(ref, false);
100: } catch (URISyntaxException e) {
101: String msg = e.getMessage();
102: if (new File(relativeRef).exists()) {
103: msg = Messages.format(Messages.ERR_FILENAME_IS_NOT_URI)
104: + ' ' + msg;
105: }
106:
107: SAXParseException spe = new SAXParseException2(Messages
108: .format(Messages.ERR_UNABLE_TO_PARSE, relativeRef,
109: msg), locator, e);
110:
111: fatalError(spe);
112: throw spe;
113: } catch (IOException e) {
114: SAXParseException spe = new SAXParseException2(Messages
115: .format(Messages.ERR_UNABLE_TO_PARSE, relativeRef,
116: e.getMessage()), locator, e);
117:
118: fatalError(spe);
119: throw spe;
120: }
121: }
122:
123: private Locator locator;
124:
125: public void setDocumentLocator(Locator locator) {
126: super.setDocumentLocator(locator);
127: this.locator = locator;
128: }
129: };
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