mirror of
https://github.com/marcin-szczepanski/jFuzzyLogic.git
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178 lines
5.6 KiB
Java
178 lines
5.6 KiB
Java
/*
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[The "BSD licence"]
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Copyright (c) 2005-2008 Terence Parr
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.antlr.tool;
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import antlr.Token;
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import org.antlr.codegen.CodeGenerator;
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import java.util.*;
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/** Track the attributes within a scope. A named scoped has just its list
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* of attributes. Each rule has potentially 3 scopes: return values,
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* parameters, and an implicitly-named scope (i.e., a scope defined in a rule).
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* Implicitly-defined scopes are named after the rule; rules and scopes then
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* must live in the same name space--no collisions allowed.
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*/
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public class AttributeScope {
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/** All token scopes (token labels) share the same fixed scope of
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* of predefined attributes. I keep this out of the runtime.Token
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* object to avoid a runtime space burden.
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*/
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public static AttributeScope tokenScope = new AttributeScope("Token",null);
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static {
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tokenScope.addAttribute("text", null);
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tokenScope.addAttribute("type", null);
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tokenScope.addAttribute("line", null);
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tokenScope.addAttribute("index", null);
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tokenScope.addAttribute("pos", null);
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tokenScope.addAttribute("channel", null);
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tokenScope.addAttribute("tree", null);
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tokenScope.addAttribute("int", null);
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}
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/** This scope is associated with which input token (for error handling)? */
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public Token derivedFromToken;
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public Grammar grammar;
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/** The scope name */
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private String name;
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/** Not a rule scope, but visible to all rules "scope symbols { ...}" */
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public boolean isDynamicGlobalScope;
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/** Visible to all rules, but defined in rule "scope { int i; }" */
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public boolean isDynamicRuleScope;
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public boolean isParameterScope;
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public boolean isReturnScope;
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public boolean isPredefinedRuleScope;
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public boolean isPredefinedLexerRuleScope;
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/** The list of Attribute objects */
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protected LinkedHashMap<String,Attribute> attributes = new LinkedHashMap();
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public AttributeScope(String name, Token derivedFromToken) {
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this(null,name,derivedFromToken);
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}
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public AttributeScope(Grammar grammar, String name, Token derivedFromToken) {
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this.grammar = grammar;
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this.name = name;
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this.derivedFromToken = derivedFromToken;
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}
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public String getName() {
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if ( isParameterScope ) {
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return name+"_parameter";
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}
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else if ( isReturnScope ) {
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return name+"_return";
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}
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return name;
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}
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/** From a chunk of text holding the definitions of the attributes,
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* pull them apart and create an Attribute for each one. Add to
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* the list of attributes for this scope. Pass in the character
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* that terminates a definition such as ',' or ';'. For example,
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*
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* scope symbols {
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* int n;
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* List names;
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* }
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*
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* would pass in definitions equal to the text in between {...} and
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* separator=';'. It results in two Attribute objects.
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*/
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public void addAttributes(String definitions, int separator) {
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List<String> attrs = new ArrayList<String>();
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CodeGenerator.getListOfArgumentsFromAction(definitions,0,-1,separator,attrs);
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for (String a : attrs) {
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Attribute attr = new Attribute(a);
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if ( !isReturnScope && attr.initValue!=null ) {
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ErrorManager.grammarError(ErrorManager.MSG_ARG_INIT_VALUES_ILLEGAL,
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grammar,
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derivedFromToken,
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attr.name);
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attr.initValue=null; // wipe it out
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}
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attributes.put(attr.name, attr);
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}
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}
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public void addAttribute(String name, String decl) {
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attributes.put(name, new Attribute(name,decl));
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}
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public Attribute getAttribute(String name) {
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return (Attribute)attributes.get(name);
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}
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/** Used by templates to get all attributes */
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public List<Attribute> getAttributes() {
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List<Attribute> a = new ArrayList<Attribute>();
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a.addAll(attributes.values());
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return a;
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}
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/** Return the set of keys that collide from
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* this and other.
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*/
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public Set intersection(AttributeScope other) {
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if ( other==null || other.size()==0 || size()==0 ) {
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return null;
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}
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Set inter = new HashSet();
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Set thisKeys = attributes.keySet();
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for (Iterator it = thisKeys.iterator(); it.hasNext();) {
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String key = (String) it.next();
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if ( other.attributes.get(key)!=null ) {
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inter.add(key);
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}
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}
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if ( inter.size()==0 ) {
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return null;
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}
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return inter;
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}
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public int size() {
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return attributes==null?0:attributes.size();
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}
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public String toString() {
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return (isDynamicGlobalScope?"global ":"")+getName()+":"+attributes;
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}
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}
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