- /*
- * 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: SymbolTable.java,v 1.11 2004/02/16 22:25:10 minchau Exp $
- */
-
- package com.sun.org.apache.xalan.internal.xsltc.compiler;
-
- import java.util.Hashtable;
- import java.util.StringTokenizer;
- import java.util.Vector;
-
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodType;
-
- /**
- * @author Jacek Ambroziak
- * @author Santiago Pericas-Geertsen
- * @author Morten Jorgensen
- */
- final class SymbolTable {
-
- // These hashtables are used for all stylesheets
- private final Hashtable _stylesheets = new Hashtable();
- private final Hashtable _primops = new Hashtable();
-
- // These hashtables are used for some stylesheets
- private Hashtable _variables = null;
- private Hashtable _templates = null;
- private Hashtable _attributeSets = null;
- private Hashtable _aliases = null;
- private Hashtable _excludedURI = null;
- private Hashtable _decimalFormats = null;
-
- public DecimalFormatting getDecimalFormatting(QName name) {
- if (_decimalFormats == null) return null;
- return((DecimalFormatting)_decimalFormats.get(name));
- }
-
- public void addDecimalFormatting(QName name, DecimalFormatting symbols) {
- if (_decimalFormats == null) _decimalFormats = new Hashtable();
- _decimalFormats.put(name, symbols);
- }
-
- 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();
- if (_templates == null) _templates = new Hashtable();
- return (Template)_templates.put(name, template);
- }
-
- public Template lookupTemplate(QName name) {
- if (_templates == null) return null;
- return (Template)_templates.get(name);
- }
-
- public Variable addVariable(Variable variable) {
- if (_variables == null) _variables = new Hashtable();
- final String name = variable.getName().getStringRep();
- return (Variable)_variables.put(name, variable);
- }
-
- public Param addParam(Param parameter) {
- if (_variables == null) _variables = new Hashtable();
- final String name = parameter.getName().getStringRep();
- return (Param)_variables.put(name, parameter);
- }
-
- public Variable lookupVariable(QName qname) {
- if (_variables == null) return null;
- final String name = qname.getStringRep();
- final Object obj = _variables.get(name);
- return obj instanceof Variable ? (Variable)obj : null;
- }
-
- public Param lookupParam(QName qname) {
- if (_variables == null) return null;
- final String name = qname.getStringRep();
- final Object obj = _variables.get(name);
- return obj instanceof Param ? (Param)obj : null;
- }
-
- public SyntaxTreeNode lookupName(QName qname) {
- if (_variables == null) return null;
- final String name = qname.getStringRep();
- return (SyntaxTreeNode)_variables.get(name);
- }
-
- public AttributeSet addAttributeSet(AttributeSet atts) {
- if (_attributeSets == null) _attributeSets = new Hashtable();
- return (AttributeSet)_attributeSets.put(atts.getName(), atts);
- }
-
- public AttributeSet lookupAttributeSet(QName name) {
- if (_attributeSets == null) return null;
- return (AttributeSet)_attributeSets.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:
- */
- private int _nsCounter = 0;
-
- public String generateNamespacePrefix() {
- return(new String("ns"+(_nsCounter++)));
- }
-
- /**
- * 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(Constants.EMPTYSTRING);
- return(_current.lookupNamespace(prefix));
- }
-
- /**
- * Adds an alias for a namespace prefix
- */
- public void addPrefixAlias(String prefix, String alias) {
- if (_aliases == null) _aliases = new Hashtable();
- _aliases.put(prefix,alias);
- }
-
- /**
- * Retrieves any alias for a given namespace prefix
- */
- public String lookupPrefixAlias(String prefix) {
- if (_aliases == null) return null;
- return (String)_aliases.get(prefix);
- }
-
- /**
- * Register a namespace URI so that it will not be declared in the output
- * unless it is actually referenced in the output.
- */
- public void excludeURI(String uri) {
- // The null-namespace cannot be excluded
- if (uri == null) return;
-
- // Create new hashtable of exlcuded URIs if none exists
- if (_excludedURI == null) _excludedURI = new Hashtable();
-
- // Register the namespace URI
- Integer refcnt = (Integer)_excludedURI.get(uri);
- if (refcnt == null)
- refcnt = new Integer(1);
- else
- refcnt = new Integer(refcnt.intValue() + 1);
- _excludedURI.put(uri,refcnt);
- }
-
- /**
- * Exclude a series of namespaces given by a list of whitespace
- * separated namespace prefixes.
- */
- 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);
- }
- }
- }
-
- /**
- * Check if a namespace should not be declared in the output (unless used)
- */
- public boolean isExcludedNamespace(String uri) {
- if (uri != null && _excludedURI != null) {
- final Integer refcnt = (Integer)_excludedURI.get(uri);
- return (refcnt != null && refcnt.intValue() > 0);
- }
- return false;
- }
-
- /**
- * Turn of namespace declaration exclusion
- */
- public void unExcludeNamespaces(String prefixes) {
- if (_excludedURI == null) return;
- 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));
- }
- }
- }
-
- }
-