| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| /* |
| * $Id$ |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import java.util.Hashtable; |
| import java.util.StringTokenizer; |
| import java.util.Vector; |
| |
| import org.apache.xalan.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; |
| private Hashtable _keys = 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 Key getKey(QName name) { |
| if (_keys == null) return null; |
| return (Key) _keys.get(name); |
| } |
| |
| public void addKey(QName name, Key key) { |
| if (_keys == null) _keys = new Hashtable(); |
| _keys.put(name, key); |
| } |
| |
| 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("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)); |
| } |
| } |
| } |
| |
| } |
| |