/*
* @(#)$Id$
*
* 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
*
*/
package org.apache.xalan.xsltc.compiler;
import java.util.Vector;
import java.util.Hashtable;
import java.util.Enumeration;
import java.util.StringTokenizer;
import org.apache.xalan.xsltc.compiler.util.*;
final class SymbolTable {
private final Hashtable _templates = new Hashtable();
private final Hashtable _stylesheets = new Hashtable();
private final Hashtable _primops = new Hashtable();
private final Hashtable _variables = new Hashtable();
private final Hashtable _atsets = new Hashtable();
private final Hashtable _namespaces = new Hashtable();
private final Hashtable _prefixes = new Hashtable();
private final Hashtable _aliases = new Hashtable();
private final Hashtable _excludedURI = new Hashtable();
private int nsCounter = 0;
public Stylesheet addStylesheet(QName name, Stylesheet node) {
return (Stylesheet)_stylesheets.put(name, node);
}
public Stylesheet lookupStylesheet(QName name) {
return (Stylesheet)_stylesheets.get(name);
}
public Template addTemplate(Template template) {
final QName name = template.getName();
name.clearDefaultNamespace();
return (Template)_templates.put(name, template);
}
public Template lookupTemplate(QName name) {
name.clearDefaultNamespace();
return (Template)_templates.get(name);
}
public Variable addVariable(Variable variable) {
final String name = variable.getName().getStringRep();
return (Variable)_variables.put(name, variable);
}
public Param addParam(Param parameter) {
final String name = parameter.getName().getStringRep();
return (Param)_variables.put(name, parameter);
}
public Variable lookupVariable(QName qname) {
final String name = qname.getStringRep();
final Object obj = _variables.get(name);
return obj instanceof Variable ? (Variable)obj : null;
}
public Param lookupParam(QName qname) {
final String name = qname.getStringRep();
final Object obj = _variables.get(name);
return obj instanceof Param ? (Param)obj : null;
}
public SyntaxTreeNode lookupName(QName qname) {
final String name = qname.getStringRep();
return (SyntaxTreeNode)_variables.get(name);
}
public AttributeSet addAttributeSet(AttributeSet atts) {
return (AttributeSet)_atsets.put(atts.getName(), atts);
}
public AttributeSet lookupAttributeSet(QName name) {
return (AttributeSet)_atsets.get(name);
}
/**
* Add a primitive operator or function to the symbol table. To avoid
* name clashes with user-defined names, the prefix <tt>PrimopPrefix</tt>
* is prepended.
*/
public void addPrimop(String name, MethodType mtype) {
Vector methods = (Vector)_primops.get(name);
if (methods == null) {
_primops.put(name, methods = new Vector());
}
methods.addElement(mtype);
}
/**
* Lookup a primitive operator or function in the symbol table by
* prepending the prefix <tt>PrimopPrefix</tt>.
*/
public Vector lookupPrimop(String name) {
return (Vector)_primops.get(name);
}
/**
* This is used for xsl:attribute elements that have a "namespace"
* attribute that is currently not defined using xmlns:
*/
public String generateNamespacePrefix() {
final String prefix = new String("ns"+(nsCounter++));
return(prefix);
}
/**
* Use a namespace prefix to lookup a namespace URI
*/
private SyntaxTreeNode _current = null;
public void setCurrentNode(SyntaxTreeNode node) {
_current = node;
}
public String lookupNamespace(String prefix) {
if (_current != null)
return(_current.lookupNamespace(prefix));
else
return(Constants.EMPTYSTRING);
}
/**
* Adds an alias for a namespace prefix
*/
public void addPrefixAlias(String prefix, String alias) {
_aliases.put(prefix,alias);
}
/**
* Retrieves any alias for a given namespace prefix
*/
public String lookupPrefixAlias(String prefix) {
return (String)_aliases.get(prefix);
}
/**
*
*/
public void excludeURI(String uri) {
if (uri == null) return;
Integer refcnt = (Integer)_excludedURI.get(uri);
if (refcnt == null)
refcnt = new Integer(1);
else
refcnt = new Integer(refcnt.intValue() + 1);
_excludedURI.put(uri,refcnt);
}
/**
*
*/
public void excludeNamespaces(String prefixes) {
if (prefixes != null) {
StringTokenizer tokens = new StringTokenizer(prefixes);
while (tokens.hasMoreTokens()) {
final String prefix = tokens.nextToken();
final String uri;
if (prefix.equals("#default"))
uri = lookupNamespace(Constants.EMPTYSTRING);
else
uri = lookupNamespace(prefix);
if (uri != null) excludeURI(uri);
}
}
}
/**
*
*/
public boolean isExcludedNamespace(String uri) {
if (uri == null) return false;
final Integer refcnt = (Integer)_excludedURI.get(uri);
if (refcnt == null) return false;
if (refcnt.intValue() > 0) return true;
return false;
}
/**
*
*/
public void unExcludeNamespaces(String prefixes) {
if (prefixes != null) {
StringTokenizer tokens = new StringTokenizer(prefixes);
while (tokens.hasMoreTokens()) {
final String prefix = tokens.nextToken();
final String uri;
if (prefix.equals("#default"))
uri = lookupNamespace(Constants.EMPTYSTRING);
else
uri = lookupNamespace(prefix);
Integer refcnt = (Integer)_excludedURI.get(uri);
if (refcnt != null)
_excludedURI.put(uri, new Integer(refcnt.intValue() - 1));
}
}
}
}