001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 /*
019 * $Id: Import.java 1225842 2011-12-30 15:14:35Z mrglavas $
020 */
021
022 package org.apache.xalan.xsltc.compiler;
023
024 import java.util.Enumeration;
025
026 import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
027 import org.apache.xalan.xsltc.compiler.util.ErrorMsg;
028 import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
029 import org.apache.xalan.xsltc.compiler.util.Type;
030 import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
031 import org.apache.xml.utils.SystemIDResolver;
032 import org.xml.sax.InputSource;
033 import org.xml.sax.XMLReader;
034
035 /**
036 * @author Jacek Ambroziak
037 * @author Morten Jorgensen
038 * @author Erwin Bolwidt <ejb@klomp.org>
039 * @author Gunnlaugur Briem <gthb@dimon.is>
040 */
041 final class Import extends TopLevelElement {
042
043 private Stylesheet _imported = null;
044
045 public Stylesheet getImportedStylesheet() {
046 return _imported;
047 }
048
049 public void parseContents(final Parser parser) {
050 final XSLTC xsltc = parser.getXSLTC();
051 final Stylesheet context = parser.getCurrentStylesheet();
052
053 try {
054 String docToLoad = getAttribute("href");
055 if (context.checkForLoop(docToLoad)) {
056 final ErrorMsg msg = new ErrorMsg(ErrorMsg.CIRCULAR_INCLUDE_ERR,
057 docToLoad, this);
058 parser.reportError(Constants.FATAL, msg);
059 return;
060 }
061
062 InputSource input = null;
063 XMLReader reader = null;
064 String currLoadedDoc = context.getSystemId();
065 SourceLoader loader = context.getSourceLoader();
066
067 // Use SourceLoader if available
068 if (loader != null) {
069 input = loader.loadSource(docToLoad, currLoadedDoc, xsltc);
070 if (input != null) {
071 docToLoad = input.getSystemId();
072 reader = xsltc.getXMLReader();
073 }
074 }
075
076 // No SourceLoader or not resolved by SourceLoader
077 if (input == null) {
078 docToLoad = SystemIDResolver.getAbsoluteURI(docToLoad, currLoadedDoc);
079 input = new InputSource(docToLoad);
080 }
081
082 // Return if we could not resolve the URL
083 if (input == null) {
084 final ErrorMsg msg =
085 new ErrorMsg(ErrorMsg.FILE_NOT_FOUND_ERR, docToLoad, this);
086 parser.reportError(Constants.FATAL, msg);
087 return;
088 }
089
090 final SyntaxTreeNode root;
091 if (reader != null) {
092 root = parser.parse(reader,input);
093 }
094 else {
095 root = parser.parse(input);
096 }
097
098 if (root == null) return;
099 _imported = parser.makeStylesheet(root);
100 if (_imported == null) return;
101
102 _imported.setSourceLoader(loader);
103 _imported.setSystemId(docToLoad);
104 _imported.setParentStylesheet(context);
105 _imported.setImportingStylesheet(context);
106 _imported.setTemplateInlining(context.getTemplateInlining());
107
108 // precedence for the including stylesheet
109 final int currPrecedence = parser.getCurrentImportPrecedence();
110 final int nextPrecedence = parser.getNextImportPrecedence();
111 _imported.setImportPrecedence(currPrecedence);
112 context.setImportPrecedence(nextPrecedence);
113 parser.setCurrentStylesheet(_imported);
114 _imported.parseContents(parser);
115
116 final Enumeration elements = _imported.elements();
117 final Stylesheet topStylesheet = parser.getTopLevelStylesheet();
118 while (elements.hasMoreElements()) {
119 final Object element = elements.nextElement();
120 if (element instanceof TopLevelElement) {
121 if (element instanceof Variable) {
122 topStylesheet.addVariable((Variable) element);
123 }
124 else if (element instanceof Param) {
125 topStylesheet.addParam((Param) element);
126 }
127 else {
128 topStylesheet.addElement((TopLevelElement) element);
129 }
130 }
131 }
132 }
133 catch (Exception e) {
134 e.printStackTrace();
135 }
136 finally {
137 parser.setCurrentStylesheet(context);
138 }
139 }
140
141 public Type typeCheck(SymbolTable stable) throws TypeCheckError {
142 return Type.Void;
143 }
144
145 public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
146 // do nothing
147 }
148 }