| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| */ |
| /* |
| * 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: SymbolTable.java,v 1.5 2005/09/28 13:48:16 pvedula Exp $ |
| */ |
| |
| package com.sun.org.apache.xalan.internal.xsltc.compiler; |
| |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodType; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Stack; |
| import java.util.StringTokenizer; |
| import java.util.Vector; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| */ |
| final class SymbolTable { |
| |
| // These maps are used for all stylesheets |
| private final Map<String, Stylesheet> _stylesheets = new HashMap<>(); |
| private final Map<String, Vector> _primops = new HashMap<>(); |
| |
| // These maps are used for some stylesheets |
| private Map<String, VariableBase> _variables = null; |
| private Map<String, Template> _templates = null; |
| private Map<String, AttributeSet> _attributeSets = null; |
| private Map<String, String> _aliases = null; |
| private Map<String, Integer> _excludedURI = null; |
| private Stack<Map<String, Integer>> _excludedURIStack = null; |
| private Map<String, DecimalFormatting> _decimalFormats = null; |
| private Map<String, Key> _keys = null; |
| |
| public DecimalFormatting getDecimalFormatting(QName name) { |
| if (_decimalFormats == null) return null; |
| return(_decimalFormats.get(name.getStringRep())); |
| } |
| |
| public void addDecimalFormatting(QName name, DecimalFormatting symbols) { |
| if (_decimalFormats == null) _decimalFormats = new HashMap<>(); |
| _decimalFormats.put(name.getStringRep(), symbols); |
| } |
| |
| public Key getKey(QName name) { |
| if (_keys == null) return null; |
| return _keys.get(name.getStringRep()); |
| } |
| |
| public void addKey(QName name, Key key) { |
| if (_keys == null) _keys = new HashMap<>(); |
| _keys.put(name.getStringRep(), key); |
| } |
| |
| public Stylesheet addStylesheet(QName name, Stylesheet node) { |
| return _stylesheets.put(name.getStringRep(), node); |
| } |
| |
| public Stylesheet lookupStylesheet(QName name) { |
| return _stylesheets.get(name.getStringRep()); |
| } |
| |
| public Template addTemplate(Template template) { |
| final QName name = template.getName(); |
| if (_templates == null) _templates = new HashMap<>(); |
| return _templates.put(name.getStringRep(), template); |
| } |
| |
| public Template lookupTemplate(QName name) { |
| if (_templates == null) return null; |
| return _templates.get(name.getStringRep()); |
| } |
| |
| public Variable addVariable(Variable variable) { |
| if (_variables == null) _variables = new HashMap<>(); |
| final String name = variable.getName().getStringRep(); |
| return (Variable)_variables.put(name, variable); |
| } |
| |
| public Param addParam(Param parameter) { |
| if (_variables == null) _variables = new HashMap<>(); |
| 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 VariableBase 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 VariableBase 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 HashMap<>(); |
| return _attributeSets.put(atts.getName().getStringRep(), atts); |
| } |
| |
| public AttributeSet lookupAttributeSet(QName name) { |
| if (_attributeSets == null) return null; |
| return _attributeSets.get(name.getStringRep()); |
| } |
| |
| /** |
| * 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 = _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 _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 HashMap<>(); |
| _aliases.put(prefix,alias); |
| } |
| |
| /** |
| * Retrieves any alias for a given namespace prefix |
| */ |
| public String lookupPrefixAlias(String prefix) { |
| if (_aliases == null) return null; |
| return _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 a new map of exlcuded URIs if none exists |
| if (_excludedURI == null) _excludedURI = new HashMap<>(); |
| |
| // Register the namespace URI |
| Integer refcnt = _excludedURI.get(uri); |
| if (refcnt == null) |
| refcnt = 1; |
| else |
| refcnt = refcnt + 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 = _excludedURI.get(uri); |
| return (refcnt != null && refcnt > 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 = _excludedURI.get(uri); |
| if (refcnt != null) |
| _excludedURI.put(uri, refcnt - 1); |
| } |
| } |
| } |
| /** |
| * Exclusion of namespaces by a stylesheet does not extend to any stylesheet |
| * imported or included by the stylesheet. Upon entering the context of a |
| * new stylesheet, a call to this method is needed to clear the current set |
| * of excluded namespaces temporarily. Every call to this method requires |
| * a corresponding call to {@link #popExcludedNamespacesContext()}. |
| */ |
| public void pushExcludedNamespacesContext() { |
| if (_excludedURIStack == null) { |
| _excludedURIStack = new Stack(); |
| } |
| _excludedURIStack.push(_excludedURI); |
| _excludedURI = null; |
| } |
| |
| /** |
| * Exclusion of namespaces by a stylesheet does not extend to any stylesheet |
| * imported or included by the stylesheet. Upon exiting the context of a |
| * stylesheet, a call to this method is needed to restore the set of |
| * excluded namespaces that was in effect prior to entering the context of |
| * the current stylesheet. |
| */ |
| public void popExcludedNamespacesContext() { |
| _excludedURI = _excludedURIStack.pop(); |
| if (_excludedURIStack.isEmpty()) { |
| _excludedURIStack = null; |
| } |
| } |
| |
| } |