Source Code Cross Referenced for BoundVarsTerm.java in  » Testing » KeY » de » uka » ilkd » key » logic » 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.logic 
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:
011:        package de.uka.ilkd.key.logic;
012:
013:        import de.uka.ilkd.key.logic.op.ArrayOfQuantifiableVariable;
014:        import de.uka.ilkd.key.logic.op.Metavariable;
015:        import de.uka.ilkd.key.logic.op.Operator;
016:        import de.uka.ilkd.key.logic.op.QuantifiableVariable;
017:
018:        /** 
019:         * Used for OCL Simplification.
020:         * A BoundVarsTerm is an object that contains an Operator and several subterms.
021:         * It can also have a number of bound variables for each subterm.   
022:         * Instances should never be accessed via 
023:         * this interface, use the interface of the superclass Term and construct instances only via
024:         * a TermFactory instead.
025:         */
026:        class BoundVarsTerm extends Term {
027:
028:            /**
029:             * @supplierCardinality *
030:             * @supplierRole subterm
031:             * @link aggregation
032:             */
033:            private final ArrayOfTerm subTerm;
034:
035:            /** variables that are bound in this term*/
036:            private final ArrayOfQuantifiableVariable[] boundVars;
037:
038:            /** depth of the term */
039:            private final int depth;
040:
041:            /** 
042:             * Creates an BoundVarsTerm with top operator op, some subterms,
043:             * zero or more bound variables for each subterm, and a sort.
044:             * @param op Operator at the top of the termstructure that starts
045:             * here.
046:             * @param subTerm An array containing subTerms (an array with length 0 if
047:             * there are no more subterms).
048:             * @param boundVars An array containing the bound variables.
049:             */
050:            public BoundVarsTerm(Operator op, Term[] subTerm,
051:                    ArrayOfQuantifiableVariable[] boundVars) {
052:                super (op, op.sort(subTerm));
053:                this .subTerm = new ArrayOfTerm(subTerm);
054:                this .boundVars = boundVars;
055:                int max_depth = -1;
056:                for (int i = 0; i < subTerm.length; i++) {
057:                    if (subTerm[i].depth() > max_depth) {
058:                        max_depth = subTerm[i].depth();
059:                    }
060:                }
061:                depth = max_depth + 1;
062:                if (op instanceof  QuantifiableVariable) {
063:                    freeVars = freeVars.add((QuantifiableVariable) op);
064:                } else if (op instanceof  Metavariable) {
065:                    metaVars = metaVars.add((Metavariable) op);
066:                }
067:
068:                fillCaches();
069:            }
070:
071:            /** @return arity of the term */
072:            public int arity() {
073:                return subTerm.size();
074:            }
075:
076:            /**@return depth of the term */
077:            public int depth() {
078:                return depth;
079:            }
080:
081:            /** the nr-th subterm */
082:            public Term sub(int nr) {
083:                return subTerm.getTerm(nr);
084:            }
085:
086:            /** 
087:             * @return The array of variables bound for subterm n. 
088:             */
089:            public ArrayOfQuantifiableVariable varsBoundHere(int n) {
090:                if (n < 0 || n > boundVars.length - 1) {
091:                    return EMPTY_VAR_LIST;
092:                } else {
093:                    return boundVars[n];
094:                }
095:            }
096:
097:            // WATCHOUT: Woj: This is probably not necessary
098:            /**
099:             * returns a linearized textual representation of this term 
100:             */
101:            /*
102:            public String toString() {
103:            StringBuffer sb = new StringBuffer(op().name().toString());
104:            if (arity()==0) return sb.toString();
105:            sb.append("(");
106:            QuantifiableVariable qvar = null;
107:            for (int i=0;i<arity();i++) {
108:                    if(varsBoundHere(i).size()==1){
109:                    sb.append("\\bind ");
110:            	qvar = varsBoundHere(i).getQuantifiableVariable(0);
111:            	if(qvar instanceof LogicVariable)
112:            	  sb.append(((LogicVariable)qvar).sort()+" "+((LogicVariable)qvar).name());
113:            	else
114:            	  sb.append(qvar);
115:            	sb.append("; ");
116:                }else{
117:            	for (int j=0; j<varsBoundHere(i).size(); j++) {
118:            	    if (j==0) {
119:            		sb.append("\\bind(");
120:            	    }
121:            	    qvar = varsBoundHere(i).getQuantifiableVariable(j);
122:            	    if(qvar instanceof LogicVariable)
123:            		sb.append(((LogicVariable)qvar).sort()+" "+((LogicVariable)qvar).name());
124:            	    else
125:            		sb.append(qvar);
126:            	    if (j!=varsBoundHere(i).size()-1) {
127:            	        sb.append("; ");
128:            	    } else {
129:            	        sb.append(")");
130:            	    }
131:            	}
132:                    }
133:                sb.append(sub(i));
134:                if (i<arity()-1) {
135:            	sb.append(",");
136:                }
137:            }
138:            sb.append(")");
139:            return sb.toString();
140:            }
141:             */
142:        }
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