| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 2001-2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * $Id: LiteralAttribute.java,v 1.2.4.1 2005/09/12 10:38:03 pvedula Exp $ |
| */ |
| |
| package com.sun.org.apache.xalan.internal.xsltc.compiler; |
| |
| import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; |
| import com.sun.org.apache.bcel.internal.generic.InstructionList; |
| import com.sun.org.apache.bcel.internal.generic.PUSH; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util; |
| |
| import com.sun.org.apache.xml.internal.serializer.ElemDesc; |
| import com.sun.org.apache.xml.internal.serializer.SerializationHandler; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| */ |
| final class LiteralAttribute extends Instruction { |
| |
| private final String _name; // Attribute name (incl. prefix) |
| private final AttributeValue _value; // Attribute value |
| |
| /** |
| * Creates a new literal attribute (but does not insert it into the AST). |
| * @param name the attribute name (incl. prefix) as a String. |
| * @param value the attribute value. |
| * @param parser the XSLT parser (wraps XPath parser). |
| */ |
| public LiteralAttribute(String name, String value, Parser parser, |
| SyntaxTreeNode parent) |
| { |
| _name = name; |
| setParent(parent); |
| _value = AttributeValue.create(this, value, parser); |
| } |
| |
| public void display(int indent) { |
| indent(indent); |
| Util.println("LiteralAttribute name=" + _name + " value=" + _value); |
| } |
| |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| _value.typeCheck(stable); |
| typeCheckContents(stable); |
| return Type.Void; |
| } |
| |
| protected boolean contextDependent() { |
| return _value.contextDependent(); |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| // push handler |
| il.append(methodGen.loadHandler()); |
| // push attribute name - namespace prefix set by parent node |
| il.append(new PUSH(cpg, _name)); |
| // push attribute value |
| _value.translate(classGen, methodGen); |
| |
| // Generate code that calls SerializationHandler.addUniqueAttribute() |
| // if all attributes are unique. |
| SyntaxTreeNode parent = getParent(); |
| if (parent instanceof LiteralElement |
| && ((LiteralElement)parent).allAttributesUnique()) { |
| |
| int flags = 0; |
| boolean isHTMLAttrEmpty = false; |
| ElemDesc elemDesc = ((LiteralElement)parent).getElemDesc(); |
| |
| // Set the HTML flags |
| if (elemDesc != null) { |
| if (elemDesc.isAttrFlagSet(_name, ElemDesc.ATTREMPTY)) { |
| flags = flags | SerializationHandler.HTML_ATTREMPTY; |
| isHTMLAttrEmpty = true; |
| } |
| else if (elemDesc.isAttrFlagSet(_name, ElemDesc.ATTRURL)) { |
| flags = flags | SerializationHandler.HTML_ATTRURL; |
| } |
| } |
| |
| if (_value instanceof SimpleAttributeValue) { |
| String attrValue = ((SimpleAttributeValue)_value).toString(); |
| |
| if (!hasBadChars(attrValue) && !isHTMLAttrEmpty) { |
| flags = flags | SerializationHandler.NO_BAD_CHARS; |
| } |
| } |
| |
| il.append(new PUSH(cpg, flags)); |
| il.append(methodGen.uniqueAttribute()); |
| } |
| else { |
| // call attribute |
| il.append(methodGen.attribute()); |
| } |
| } |
| |
| /** |
| * Return true if at least one character in the String is considered to |
| * be a "bad" character. A bad character is one whose code is: |
| * less than 32 (a space), |
| * or greater than 126, |
| * or it is one of '<', '>', '&' or '\"'. |
| * This helps the serializer to decide whether the String needs to be escaped. |
| */ |
| private boolean hasBadChars(String value) { |
| char[] chars = value.toCharArray(); |
| int size = chars.length; |
| for (int i = 0; i < size; i++) { |
| char ch = chars[i]; |
| if (ch < 32 || 126 < ch || ch == '<' || ch == '>' || ch == '&' || ch == '\"') |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Return the name of the attribute |
| */ |
| public String getName() { |
| return _name; |
| } |
| |
| /** |
| * Return the value of the attribute |
| */ |
| public AttributeValue getValue() { |
| return _value; |
| } |
| |
| } |