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24 package org.objectweb.jalisto.se.query.constraint;
25
26 import org.objectweb.jalisto.se.api.ClassDescription;
27 import org.objectweb.jalisto.se.api.Session;
28 import org.objectweb.jalisto.se.api.query.FielComparator;
29 import org.objectweb.jalisto.se.api.query.Constraint;
30 import org.objectweb.jalisto.se.api.query.Operator;
31 import org.objectweb.jalisto.se.query.operator.OperatorFactory;
32 import org.objectweb.jalisto.se.query.parameter.QueryValue;
33 import org.objectweb.jalisto.se.query.result.WrapperSet;
34
35 import java.util.ArrayList  ;
36 import java.util.Collection ;
37
38 public class ValueConstraintImpl extends ConstraintImpl {
39
40 public ValueConstraintImpl(String className, ArrayList subFieldNames, QueryValue value) {
41 this.className = className;
42 this.fieldNames = new String [subFieldNames.size()];
43 for (int i = 0; i < fieldNames.length; i++) {
44 fieldNames[i] = (String ) subFieldNames.get(i);
45 }
46 this.value = value;
47 this.resolvedValues = new WrapperSet();
48 this.isResolved = false;
49 }
50
51 public Constraint contains() {
52 operator = OperatorFactory.getContainsOperator();
53 return this;
54 }
55
56 public Constraint equal() {
57 operator = OperatorFactory.getEqualOperator();
58 return this;
59 }
60
61 public Object getObject() {
62 return value.getValue();
63 }
64
65 public Constraint greater() {
66 operator = OperatorFactory.getGreaterOperator();
67 return this;
68 }
69
70 public Constraint identity() {
71 operator = OperatorFactory.getIdentityOperator();
72 return this;
73 }
74
75 public Constraint like() {
76 throw new UnsupportedOperationException ();
77 }
78
79 public Constraint not() {
80 not = !not;
81 return this;
82 }
83
84 public Constraint smaller() {
85 operator = OperatorFactory.getSmallerOperator();
86 return this;
87 }
88
89 public boolean execute(Session session, FielComparator comparator, Object candidate) {
90 ArrayList candidates = new ArrayList ();
91 candidates.add(candidate);
92 if (fieldNames.length > 1) {
93 candidates.clear();
94 if (Collection .class.isAssignableFrom(candidate.getClass())) {
95 candidates.addAll((Collection ) candidate);
96 } else {
97 candidates.add(candidate);
98 }
99 for (short i = 1; i < fieldNames.length; i++) {
100 String currentClassName = session.getClassNameFor(candidates.get(0));
102 ClassDescription meta = session.getMetaRepository().getMetaData(currentClassName);
103 int index = meta.getIndex(fieldNames[i]);
104
105 ArrayList newCandidates = new ArrayList ();
106 for (int j = 0; j < candidates.size(); j++) {
107 newCandidates.add(session.readObjectByOid(candidates.get(j))[index]);
108 }
109 candidates.clear();
110 if (Collection .class.isAssignableFrom(newCandidates.get(0).getClass())) {
111 for (int j = 0; j < newCandidates.size(); j++) {
112 candidates.addAll((Collection ) newCandidates.get(i));
113 }
114 } else {
115 candidates.addAll(newCandidates);
116 }
117 }
118 }
119 if (not) {
120 return (!operator.execute(comparator, candidates, value.getValue()));
121 } else {
122 return operator.execute(comparator, candidates, value.getValue());
123 }
124 }
125
126 public String getFieldName() {
127 return fieldNames[0];
128 }
129
130 public String [] getFieldNames() {
131 return fieldNames;
132 }
133
134 public String getClassName() {
135 return className;
136 }
137
138 public boolean isResolved() {
139 return isResolved;
140 }
141
142 public void setResolved(boolean resolved) {
143 isResolved = resolved;
144 }
145
146 public WrapperSet getResolvedValues() {
147 return resolvedValues;
148 }
149
150 public void clean() {
151 resolvedValues.clear();
152 isResolved = false;
153 }
154
155 public String toString() {
156 StringBuffer sb = new StringBuffer ();
157 sb.append("VCon").append(fieldNames[0]).append(operator).append(value.getValue());
158 return sb.toString();
159 }
160
161
162 private String className;
163 private String [] fieldNames;
164 private QueryValue value;
165 private Operator operator;
166 private boolean not = false;
167
168 protected WrapperSet resolvedValues;
169 protected boolean isResolved;
170 }
171 |
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