/*
* @(#)$Id$
*
* 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 org.apache.xalan.xsltc.compiler.util.Type;
import de.fub.bytecode.generic.*;
import org.apache.xalan.xsltc.compiler.util.*;
final class XslAttribute extends Instruction {
// Error messages:
private final static String ILLEGAL_ATTRIBUTE_NAME =
"Illegal attribute name: 'xmlns'";
// Attribute contents
private AttributeValue _name; // name treated as AVT (7.1.3)
private AttributeValueTemplate _namespace = null;
private String _prefix;
private boolean _ignore = false;
/**
* Returns the name of the attribute
*/
public AttributeValue getName() {
return _name;
}
/**
* Displays the contents of the attribute
*/
public void display(int indent) {
indent(indent);
Util.println("Attribute " + _name);
displayContents(indent + IndentIncrement);
}
/**
* Parses the attribute's contents. Special care taken for namespaces.
*/
public void parseContents(Parser parser) {
final SymbolTable stable = parser.getSymbolTable();
String namespace = getAttribute("namespace");
String name = getAttribute("name");
QName qname = parser.getQName(name);
final String prefix = qname.getPrefix();
boolean generated = false;
if ((prefix != null) && (prefix.equals("xmlns"))) {
reportError(this, parser, ErrorMsg.ILL_ATTR_ERR, name);
return;
}
// Ignore attribute if preceeded by some other type of element
final SyntaxTreeNode parent = getParent();
final Vector siblings = parent.getContents();
for (int i = 0; i < parent.elementCount(); i++) {
SyntaxTreeNode item = (SyntaxTreeNode)siblings.elementAt(i);
if (item == this) break;
if (item instanceof XslAttribute) continue;
if (item instanceof UseAttributeSets) continue;
if (item instanceof LiteralAttribute) continue;
_ignore = true;
reportWarning(this, parser, ErrorMsg.ATTROUTS_ERR, name);
return;
}
// Get namespace from namespace attribute?
if ((namespace != null) && (namespace != Constants.EMPTYSTRING)) {
// Prefix could be in symbol table
_prefix = lookupPrefix(namespace);
_namespace = new AttributeValueTemplate(namespace, parser);
}
// Get namespace from prefix in name attribute?
else if ((prefix != null) && (prefix != Constants.EMPTYSTRING)) {
_prefix = prefix;
namespace = lookupNamespace(prefix);
if (namespace != null)
_namespace = new AttributeValueTemplate(namespace, parser);
}
// Common handling for namespaces:
if (_namespace != null) {
// Generate prefix if we have none
if (_prefix == null) {
if (prefix != null) {
_prefix = prefix;
}
else {
_prefix = stable.generateNamespacePrefix();
generated = true;
}
}
if (_prefix == Constants.EMPTYSTRING) {
name = qname.getLocalPart();
}
else {
name = _prefix+":"+qname.getLocalPart();
// PROBLEM:
// The namespace URI must be passed to the parent element,
// but we don't yet know what the actual URI is (as we only
// know it as an attribute value template). New design needed.
if ((parent instanceof LiteralElement) && (!generated)) {
((LiteralElement)parent).registerNamespace(_prefix,
namespace,
stable,false);
}
}
}
if (name.equals("xmlns")) {
final ErrorMsg msg =
new ErrorMsg(ILLEGAL_ATTRIBUTE_NAME, getLineNumber());
parser.reportError(Constants.ERROR, msg);
return;
}
if (parent instanceof LiteralElement) {
((LiteralElement)parent).addAttribute(this);
}
_name = AttributeValue.create(this, name, parser);
parseChildren(parser);
}
/**
*
*/
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
if (_ignore) return(Type.Void);
_name.typeCheck(stable);
if (_namespace != null)
_namespace.typeCheck(stable);
typeCheckContents(stable);
return Type.Void;
}
/**
*
*/
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
if (_ignore) return;
_ignore = true;
// Compile code that emits any needed namespace declaration
if (_namespace != null) {
// public void attribute(final String name, final String value)
il.append(methodGen.loadHandler());
il.append(new PUSH(cpg,_prefix));
_namespace.translate(classGen,methodGen);
il.append(methodGen.namespace());
}
// Save the current handler base on the stack
il.append(methodGen.loadHandler());
il.append(DUP); // first arg to "attributes" call
// push attribute name
_name.translate(classGen, methodGen);// 2nd arg
il.append(classGen.loadTranslet());
il.append(new GETFIELD(cpg.addFieldref(TRANSLET_CLASS,
"stringValueHandler",
STRING_VALUE_HANDLER_SIG)));
il.append(DUP);
il.append(methodGen.storeHandler());
// translate contents with substituted handler
translateContents(classGen, methodGen);
// get String out of the handler
il.append(new INVOKEVIRTUAL(cpg.addMethodref(STRING_VALUE_HANDLER,
"getValue",
"()" + STRING_SIG)));
// call "attribute"
il.append(methodGen.attribute());
// Restore old handler base from stack
il.append(methodGen.storeHandler());
}
}