| /* |
| * @(#)$Id$ |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2001, Sun |
| * Microsystems., http://www.sun.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import java.util.Vector; |
| import java.util.Enumeration; |
| import java.util.StringTokenizer; |
| |
| import javax.xml.parsers.*; |
| |
| import org.xml.sax.*; |
| |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.bcel.generic.*; |
| import org.apache.xalan.xsltc.compiler.util.*; |
| |
| final class AttributeSet extends TopLevelElement { |
| |
| // This prefix is used for the method name of attribute set methods |
| private static final String AttributeSetPrefix = "$as$"; |
| |
| // Element contents |
| private QName _name; |
| private UseAttributeSets _useSets; |
| private String _method; |
| private boolean _ignore = false; |
| |
| /** |
| * Returns the QName of this attribute set |
| */ |
| public QName getName() { |
| return _name; |
| } |
| |
| /** |
| * Returns the method name of this attribute set. This method name is |
| * generated by the compiler (XSLTC) |
| */ |
| public String getMethodName() { |
| return _method; |
| } |
| |
| /** |
| * Call this method to prevent a method for being compiled for this set. |
| * This is used in case several <xsl:attribute-set...> elements constitute |
| * a single set (with one name). The last element will merge itself with |
| * any previous set(s) with the same name and disable the other set(s). |
| */ |
| public void ignore() { |
| _ignore = true; |
| } |
| |
| /** |
| * Parse the contents of this attribute set. Recognised attributes are |
| * "name" (required) and "use-attribute-sets" (optional). |
| */ |
| public void parseContents(Parser parser) { |
| |
| // Get this attribute set's name |
| _name = parser.getQName(getAttribute("name")); |
| if ((_name == null) || (_name.equals(EMPTYSTRING))) { |
| ErrorMsg msg = new ErrorMsg(ErrorMsg.UNNAMED_ATTRIBSET_ERR, this); |
| parser.reportError(Constants.ERROR, msg); |
| } |
| |
| // Get any included attribute sets (similar to inheritance...) |
| final String useSets = getAttribute("use-attribute-sets"); |
| if (useSets.length() > 0) { |
| _useSets = new UseAttributeSets(useSets, parser); |
| } |
| |
| // Parse the contents of this node. All child elements must be |
| // <xsl:attribute> elements. Other elements cause an error. |
| final Vector contents = getContents(); |
| final int count = contents.size(); |
| for (int i=0; i<count; i++) { |
| SyntaxTreeNode child = (SyntaxTreeNode)contents.elementAt(i); |
| if (child instanceof XslAttribute) { |
| parser.getSymbolTable().setCurrentNode(child); |
| child.parseContents(parser); |
| } |
| else if (child instanceof Text) { |
| // ignore |
| } |
| else { |
| ErrorMsg msg = new ErrorMsg(ErrorMsg.ILLEGAL_CHILD_ERR, this); |
| parser.reportError(Constants.ERROR, msg); |
| } |
| } |
| |
| // Point the symbol table back at us... |
| parser.getSymbolTable().setCurrentNode(this); |
| } |
| |
| /** |
| * Type check the contents of this element |
| */ |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| |
| if (_ignore) return (Type.Void); |
| |
| final AttributeSet other = stable.addAttributeSet(this); |
| if (other != null) { |
| _method = other.getMethodName(); |
| merge(other); |
| other.ignore(); |
| } |
| else { |
| _method = AttributeSetPrefix + getXSLTC().nextAttributeSetSerial(); |
| } |
| |
| if (_useSets != null) _useSets.typeCheck(stable); |
| typeCheckContents(stable); |
| return Type.Void; |
| } |
| |
| /** |
| * Merge this attribute set with some other one |
| */ |
| private void merge(AttributeSet other) { |
| // Both attribute sets may inherit from other sets... |
| if (_useSets == null) |
| _useSets = other._useSets; |
| else |
| _useSets.addAttributeSets(other.getAttribute("use-attribute-sets")); |
| |
| // Merge the contents of the two attribute sets... |
| final Enumeration attributes = other.elements(); |
| while (attributes.hasMoreElements()) { |
| SyntaxTreeNode element = (SyntaxTreeNode)attributes.nextElement(); |
| if (element instanceof XslAttribute) { |
| setFirstElement((XslAttribute)element); |
| } |
| } |
| } |
| |
| /** |
| * Compile a method that outputs the attributes in this set |
| */ |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| |
| if (_ignore) return; |
| |
| // Create a new method generator for an attribute set method |
| methodGen = new AttributeSetMethodGenerator(_method, classGen); |
| |
| // Translate other used attribute sets first, as local attributes |
| // take precedence (last attributes overrides first) |
| if (_useSets != null) _useSets.translate(classGen, methodGen); |
| |
| // Translate all local attributes |
| final Enumeration attributes = elements(); |
| while (attributes.hasMoreElements()) { |
| SyntaxTreeNode element = (SyntaxTreeNode)attributes.nextElement(); |
| if (element instanceof XslAttribute) { |
| final XslAttribute attribute = (XslAttribute)element; |
| attribute.translate(classGen, methodGen); |
| } |
| } |
| final InstructionList il = methodGen.getInstructionList(); |
| il.append(RETURN); |
| |
| methodGen.stripAttributes(true); |
| methodGen.setMaxLocals(); |
| methodGen.setMaxStack(); |
| methodGen.removeNOPs(); |
| classGen.addMethod(methodGen.getMethod()); |
| } |
| |
| public String toString() { |
| StringBuffer buf = new StringBuffer("attribute-set: "); |
| // Translate all local attributes |
| final Enumeration attributes = elements(); |
| while (attributes.hasMoreElements()) { |
| final XslAttribute attribute = |
| (XslAttribute)attributes.nextElement(); |
| buf.append(attribute); |
| } |
| return(buf.toString()); |
| } |
| } |