001: /*
002: $Id: VariableScope.java 3419 2006-01-19 00:07:02Z blackdrag $
003:
004: Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005:
006: Redistribution and use of this software and associated documentation
007: ("Software"), with or without modification, are permitted provided
008: that the following conditions are met:
009:
010: 1. Redistributions of source code must retain copyright
011: statements and notices. Redistributions must also contain a
012: copy of this document.
013:
014: 2. Redistributions in binary form must reproduce the
015: above copyright notice, this list of conditions and the
016: following disclaimer in the documentation and/or other
017: materials provided with the distribution.
018:
019: 3. The name "groovy" must not be used to endorse or promote
020: products derived from this Software without prior written
021: permission of The Codehaus. For written permission,
022: please contact info@codehaus.org.
023:
024: 4. Products derived from this Software may not be called "groovy"
025: nor may "groovy" appear in their names without prior written
026: permission of The Codehaus. "groovy" is a registered
027: trademark of The Codehaus.
028:
029: 5. Due credit should be given to The Codehaus -
030: http://groovy.codehaus.org/
031:
032: THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
033: ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
034: NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
035: FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
036: THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
037: INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
038: (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
039: SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
040: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
041: STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
042: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
043: OF THE POSSIBILITY OF SUCH DAMAGE.
044:
045: */
046: package org.codehaus.groovy.ast;
047:
048: import java.util.HashMap;
049: import java.util.Map;
050:
051: /**
052: * Represents a variable scope. This is primarily used to determine variable sharing
053: * across method and closure boundaries.
054: *
055: * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
056: * @author Jochen Theodorou
057: * @version $Revision: 3419 $
058: */
059: public class VariableScope {
060: private Map declaredVariables = new HashMap();
061: private Map referencedLocalVariables = new HashMap();
062: private Map referencedClassVariables = new HashMap();
063:
064: private boolean inStaticContext = false;
065: private boolean resolvesDynamic = false;
066: private ClassNode clazzScope;
067: private VariableScope parent;
068:
069: public VariableScope() {
070: }
071:
072: public VariableScope(VariableScope parent) {
073: this .parent = parent;
074: }
075:
076: public Map getDeclaredVariables() {
077: return declaredVariables;
078: }
079:
080: public Variable getDeclaredVariable(String name) {
081: return (Variable) declaredVariables.get(name);
082: }
083:
084: public Map getReferencedLocalVariables() {
085: return referencedLocalVariables;
086: }
087:
088: public boolean isReferencedLocalVariable(String name) {
089: return referencedLocalVariables.containsKey(name);
090: }
091:
092: public Map getReferencedClassVariables() {
093: return referencedClassVariables;
094: }
095:
096: public boolean isReferencedClassVariable(String name) {
097: return referencedClassVariables.containsKey(name);
098: }
099:
100: public VariableScope getParent() {
101: return parent;
102: }
103:
104: public boolean isInStaticContext() {
105: return inStaticContext;
106: }
107:
108: public void setInStaticContext(boolean inStaticContext) {
109: this .inStaticContext = inStaticContext;
110: }
111:
112: public boolean isResolvingDynamic() {
113: return resolvesDynamic;
114: }
115:
116: public void setDynamicResolving(boolean resolvesDynamic) {
117: this .resolvesDynamic = resolvesDynamic;
118: }
119:
120: public void setClassScope(ClassNode node) {
121: this .clazzScope = node;
122: }
123:
124: public ClassNode getClassScope() {
125: return clazzScope;
126: }
127:
128: public boolean isClassScope() {
129: return clazzScope != null;
130: }
131:
132: public boolean isRoot() {
133: return parent == null;
134: }
135:
136: public VariableScope copy() {
137: VariableScope copy = new VariableScope();
138: copy.clazzScope = clazzScope;
139: copy.declaredVariables.putAll(declaredVariables);
140: copy.inStaticContext = inStaticContext;
141: copy.parent = parent;
142: copy.referencedClassVariables.putAll(referencedClassVariables);
143: copy.referencedLocalVariables.putAll(referencedLocalVariables);
144: copy.resolvesDynamic = resolvesDynamic;
145: return copy;
146: }
147: }
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