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24 package org.objectweb.jalisto.se.query.execution;
25
26 import org.objectweb.jalisto.se.api.Session;
27 import org.objectweb.jalisto.se.api.MetaRepository;
28 import org.objectweb.jalisto.se.api.query.IndexManager;
29 import org.objectweb.jalisto.se.query.constraint.BinaryBooleanOperatorConstraint;
30 import org.objectweb.jalisto.se.query.result.QueryResultWrapper;
31 import org.objectweb.jalisto.se.query.result.WrapperSet;
32
33 import java.util.List  ;
34
35 public class ExecutionNode extends ExecutionElement {
36
37 public ExecutionNode(ExecutionTree tree, ExecutionElement father,
38 BinaryBooleanOperatorConstraint binaryConstraint, int depth) {
39 super(tree, father, depth);
40 this.andOp = binaryConstraint.isAndOperator();
41 }
42
43 public void setLeft(ExecutionElement left) {
44 this.left = left;
45 }
46
47 public void setRight(ExecutionElement right) {
48 this.right = right;
49 }
50
51 public boolean onlyOneToResolve() {
52 if (left.isResolved()) {
53 return !right.isResolved();
54 }
55 return right.isResolved();
56 }
57
58 public boolean isAndNode() {
59 return andOp;
60 }
61
62 public boolean isInOrBranch(IndexManager indexManager) {
63 return ((!andOp) && (left.isInOrBranch(indexManager) || right.isInOrBranch(indexManager)));
64 }
65
66 public void cleanSubExecutionTree() {
67 super.cleanSubExecutionTree();
68 left.cleanSubExecutionTree();
69 right.cleanSubExecutionTree();
70 }
71
72 public void cleanAll() {
73 super.cleanAll();
74 left.cleanAll();
75 right.cleanAll();
76 }
77
78 public void defineMeta(MetaRepository repository) {
79 left.defineMeta(repository);
80 right.defineMeta(repository);
81 }
82
83
86
87 public ExecutionNode resolveBack() {
88 if (isResolved()) {
89 return getFather();
90 }
91
92 if (left.isResolved() && right.isResolved()) {
93 WrapperSet setLeft = left.getResolvedValues();
94 WrapperSet setRight = right.getResolvedValues();
95 if (andOp) {
96 doIntersection(resolvedValues, setLeft, setRight);
97 tree.getToResolveAndNodes().remove(this);
98 } else {
99 resolvedValues.addAll(setLeft);
100 resolvedValues.addAll(setRight);
101 }
102 isResolved = true;
103 if (andOp) {
104 tree.getToResolveAndNodes().remove(this);
105 }
106 return getFather();
107 }
108
109 return null;
110 }
111
112 public void resolveBeforeAndNodeNearRoot(Session session, WrapperSet candidates, List toResolve) {
113 ExecutionElement resolved;
115 ExecutionElement unresolved;
116 if (left.isResolved()) {
117 resolved = left;
118 unresolved = right;
119 } else {
120 resolved = right;
121 unresolved = left;
122 }
123
124 if (candidates != null) {
125 unresolved.resolveBeforeAndNodeNearRoot(
126 session,
127 doIntersection(new WrapperSet(), candidates, resolved.getResolvedValues()),
128 toResolve);
129 } else {
130 unresolved.resolveBeforeAndNodeNearRoot(session, resolved.getResolvedValues(), toResolve);
131 }
132
133 toResolve.remove(this);
134 }
135
136 public boolean resolveOnElement(Session session, QueryResultWrapper wrapper) {
137 if (andOp) {
138 return left.resolveOnElement(session, wrapper) && right.resolveOnElement(session, wrapper);
139 } else {
140 return left.resolveOnElement(session, wrapper) || right.resolveOnElement(session, wrapper);
141 }
142 }
143
144 public WrapperSet resolveWithCandidates(Session session, WrapperSet candidates) {
145 if (isResolved()) {
146 return doIntersection(new WrapperSet(), candidates, resolvedValues);
147 }
148
149 ExecutionElement resolved;
151 ExecutionElement unresolved;
152 if (left.isResolved()) {
153 resolved = left;
154 unresolved = right;
155 } else {
156 resolved = right;
157 unresolved = left;
158 }
159
160 WrapperSet wSet = doIntersection(new WrapperSet(), candidates, resolved.getResolvedValues());
161 resolvedValues = unresolved.resolveWithCandidates(session, wSet);
162 isResolved = true;
163
164 if (andOp) {
165 tree.getToResolveAndNodes().remove(this); }
167
168 return resolvedValues;
169 }
170
171 public String toString() {
172 if (andOp) {
173 return "Enode&&";
174 } else {
175 return "Enode||";
176 }
177 }
178
179
180 private boolean andOp;
181 private ExecutionElement left;
182 private ExecutionElement right;
183
184 }
185 |
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