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1
24 package org.objectweb.jalisto.se.query.constraint;
25
26 import org.objectweb.jalisto.se.api.Session;
27 import org.objectweb.jalisto.se.api.query.FielComparator;
28 import org.objectweb.jalisto.se.api.query.Constraint;
29 import org.objectweb.jalisto.se.query.exception.QueryEngineException;
30
31 import java.util.HashSet  ;
32 import java.util.Iterator ;
33 import java.util.Set ;
34
35 public class ConstraintImpl implements Constraint {
36 public ConstraintImpl() {
37 this.fathers = new HashSet ();
38 }
39
40 public Constraint and(Constraint with) {
41 BinaryBooleanOperatorConstraint binaryConstraint =
42 new BinaryBooleanOperatorConstraint(this, with, BinaryBooleanOperatorConstraint.AND_OP);
43 fathers.add(binaryConstraint);
44 ((ConstraintImpl) with).addBinaryConstraint(binaryConstraint);
45 return binaryConstraint;
46 }
47
48 public Constraint or(Constraint with) {
49 BinaryBooleanOperatorConstraint binaryConstraint =
50 new BinaryBooleanOperatorConstraint(this, with, BinaryBooleanOperatorConstraint.OR_OP);
51 fathers.add(binaryConstraint);
52 ((ConstraintImpl) with).addBinaryConstraint(binaryConstraint);
53 return binaryConstraint;
54 }
55
56 public Constraint equal() {
57 throw new QueryEngineException();
58 }
59
60 public Constraint greater() {
61 throw new QueryEngineException();
62 }
63
64 public Constraint smaller() {
65 throw new QueryEngineException();
66 }
67
68 public Constraint identity() {
69 throw new QueryEngineException();
70 }
71
72 public Constraint like() {
73 throw new QueryEngineException();
74 }
75
76 public Constraint contains() {
77 throw new QueryEngineException();
78 }
79
80 public Constraint not() {
81 throw new QueryEngineException();
82 }
83
84 public Object getObject() {
85 throw new QueryEngineException();
86 }
87
88 public boolean execute(Session session, FielComparator comparator, Object candidate) {
89 return false;
90 }
91
92 protected void addBinaryConstraint(BinaryBooleanOperatorConstraint binaryConstraint) {
93 if (!fathers.contains(binaryConstraint)) {
94 fathers.add(binaryConstraint);
95 }
96 }
97
98 public Set getRootFathers() {
99 HashSet result = new HashSet ();
100 if (!fathers.isEmpty()) {
101 Iterator bcIt = fathers.iterator();
102 while (bcIt.hasNext()) {
103 BinaryBooleanOperatorConstraint bc = (BinaryBooleanOperatorConstraint) bcIt.next();
104 result.addAll(bc.getRootFathers());
105 }
106 } else {
107 result.add(this);
108 }
109 return result;
110 }
111
112
113 protected Set fathers;
114 }
115 |
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