Source Code Cross Referenced for DeclarationProgramVariableCollector.java in  » Testing » KeY » de » uka » ilkd » key » java » visitor » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Testing » KeY » de.uka.ilkd.key.java.visitor 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // This file is part of KeY - Integrated Deductive Software Design
002:        // Copyright (C) 2001-2007 Universitaet Karlsruhe, Germany
003:        //                         Universitaet Koblenz-Landau, Germany
004:        //                         Chalmers University of Technology, Sweden
005:        //
006:        // The KeY system is protected by the GNU General Public License. 
007:        // See LICENSE.TXT for details.
008:        //
009:        //
010:        package de.uka.ilkd.key.java.visitor;
011:
012:        import java.util.HashSet;
013:
014:        import de.uka.ilkd.key.java.ProgramElement;
015:        import de.uka.ilkd.key.java.SourceElement;
016:        import de.uka.ilkd.key.java.declaration.FieldSpecification;
017:        import de.uka.ilkd.key.java.declaration.ImplicitFieldSpecification;
018:        import de.uka.ilkd.key.java.declaration.VariableSpecification;
019:        import de.uka.ilkd.key.java.statement.CatchAllStatement;
020:        import de.uka.ilkd.key.logic.op.IProgramVariable;
021:        import de.uka.ilkd.key.logic.op.LocationVariable;
022:        import de.uka.ilkd.key.logic.op.ProgramConstant;
023:
024:        /** 
025:         * The DeclarationProgramVariableCollector collects all top level
026:         * declared program variables relative to the given block to be
027:         * visited, for example starting with <code>
028:         *  { int j; { int i; } { int h; } for (int k; ...) {} int h; }
029:         * </code>
030:         *  the collector will return a set containg <code>j, h</code> the
031:         *  <code>h</code> because of the second occurrence of <code>h</code>
032:         */
033:        public class DeclarationProgramVariableCollector extends JavaASTVisitor {
034:
035:            private HashSet result = new HashSet();
036:
037:            /** creates a new declaration visitor */
038:            public DeclarationProgramVariableCollector(ProgramElement root) {
039:                super (root);
040:            }
041:
042:            /** the action that is performed just before leaving the node the
043:             * last time 
044:             */
045:            protected void doAction(ProgramElement node) {
046:                node.visit(this );
047:            }
048:
049:            /** starts the walker*/
050:            public void start() {
051:                walk(root());
052:            }
053:
054:            public HashSet result() {
055:                return result;
056:            }
057:
058:            public String toString() {
059:                return result.toString();
060:            }
061:
062:            /**
063:             * adds the given variable if we are currently at top level
064:             */
065:            protected void addVariable(IProgramVariable var) {
066:                if (depth() == 1) {
067:                    result.add(var);
068:                }
069:            }
070:
071:            protected void doDefaultAction(SourceElement x) {
072:            }
073:
074:            public void performActionOnVariableSpecification(
075:                    VariableSpecification x) {
076:                addVariable(x.getProgramVariable());
077:            }
078:
079:            public void performActionOnFieldSpecification(FieldSpecification x) {
080:                addVariable(x.getProgramVariable());
081:            }
082:
083:            public void performActionOnImplicitFieldSpecification(
084:                    ImplicitFieldSpecification x) {
085:                addVariable(x.getProgramVariable());
086:            }
087:
088:            public void performActionOnCatchAllStatement(CatchAllStatement x) {
089:                result.add(x.getParameterDeclaration()
090:                        .getVariableSpecification().getProgramVariable());
091:            }
092:
093:            public void performActionOnLocationVariable(LocationVariable x) {
094:                performActionOnProgramVariable(x);
095:
096:            }
097:
098:            public void performActionOnProgramConstant(ProgramConstant x) {
099:                performActionOnProgramVariable(x);
100:            }
101:
102:        }
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