001: /* ====================================================================
002: * Tea - Copyright (c) 1997-2000 Walt Disney Internet Group
003: * ====================================================================
004: * The Tea Software License, Version 1.1
005: *
006: * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
007: *
008: * Redistribution and use in source and binary forms, with or without
009: * modification, are permitted provided that the following conditions
010: * are met:
011: *
012: * 1. Redistributions of source code must retain the above copyright
013: * notice, this list of conditions and the following disclaimer.
014: *
015: * 2. Redistributions in binary form must reproduce the above copyright
016: * notice, this list of conditions and the following disclaimer in
017: * the documentation and/or other materials provided with the
018: * distribution.
019: *
020: * 3. The end-user documentation included with the redistribution,
021: * if any, must include the following acknowledgment:
022: * "This product includes software developed by the
023: * Walt Disney Internet Group (http://opensource.go.com/)."
024: * Alternately, this acknowledgment may appear in the software itself,
025: * if and wherever such third-party acknowledgments normally appear.
026: *
027: * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
028: * not be used to endorse or promote products derived from this
029: * software without prior written permission. For written
030: * permission, please contact opensource@dig.com.
031: *
032: * 5. Products derived from this software may not be called "Tea",
033: * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
034: * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
035: * written permission of the Walt Disney Internet Group.
036: *
037: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
038: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
039: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
040: * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
041: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
042: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
043: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
044: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
045: * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
046: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
047: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
048: * ====================================================================
049: *
050: * For more information about Tea, please see http://opensource.go.com/.
051: */
052:
053: package com.go.tea.parsetree;
054:
055: import com.go.tea.compiler.SourceInfo;
056: import com.go.tea.compiler.Type;
057:
058: /******************************************************************************
059: * A Variable represents a variable declaration. A VariableRef is used to
060: * reference Variables.
061: *
062: * @author Brian S O'Neill
063: * @version
064: * <!--$$Revision:--> 35 <!-- $-->, <!--$$JustDate:--> 01/05/07 <!-- $-->
065: * @see VariableRef
066: */
067: public class Variable extends Node {
068: private String mName;
069: private TypeName mTypeName;
070: private Type mType;
071:
072: private boolean mField;
073: private boolean mStatic;
074: private boolean mTransient;
075:
076: /**
077: * Used for variable declarations.
078: */
079: public Variable(SourceInfo info, String name, TypeName typeName) {
080: super (info);
081:
082: mName = name;
083: mTypeName = typeName;
084: }
085:
086: /**
087: * Used when creating variables whose type has already been checked.
088: */
089: public Variable(SourceInfo info, String name, Type type) {
090: super (info);
091:
092: mName = name;
093: mTypeName = new TypeName(info, type);
094: mType = type;
095: }
096:
097: public Object accept(NodeVisitor visitor) {
098: return visitor.visit(this );
099: }
100:
101: public TypeName getTypeName() {
102: return mTypeName;
103: }
104:
105: public String getName() {
106: return mName;
107: }
108:
109: public void setName(String name) {
110: mName = name;
111: }
112:
113: /**
114: * Returns null if type is unknown.
115: */
116: public Type getType() {
117: return mType;
118: }
119:
120: public void setType(Type type) {
121: mTypeName = new TypeName(getSourceInfo(), type);
122: mType = type;
123: }
124:
125: /**
126: * @return true if this variable is a field instead of a local variable.
127: */
128: public boolean isField() {
129: return mField;
130: }
131:
132: /**
133: * @return true if this variable is a field and is static.
134: */
135: public boolean isStatic() {
136: return mStatic;
137: }
138:
139: /**
140: * @return true if this variable is transient.
141: */
142: public boolean isTransient() {
143: return mTransient;
144: }
145:
146: public void setField(boolean b) {
147: mField = b;
148: if (!b) {
149: mStatic = false;
150: }
151: }
152:
153: public void setStatic(boolean b) {
154: mStatic = b;
155: if (b) {
156: mField = true;
157: }
158: }
159:
160: public void setTransient(boolean b) {
161: mTransient = b;
162: }
163:
164: public int hashCode() {
165: return mName.hashCode() + mTypeName.hashCode();
166: }
167:
168: /**
169: * Variables are tested for equality only by their name and type.
170: * Field status is ignored.
171: */
172: public boolean equals(Object other) {
173: if (other instanceof Variable) {
174: Variable v = (Variable) other;
175: return mName.equals(v.mName)
176: && mTypeName.equals(v.mTypeName);
177: } else {
178: return false;
179: }
180: }
181: }
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