|
1
16 package org.outerj.daisy.query.model;
17
18 import org.outerj.daisy.repository.query.QueryException;
19 import org.outerj.daisy.repository.query.EvaluationContext;
20 import org.outerj.daisy.repository.Document;
21 import org.outerj.daisy.repository.Version;
22
23 import java.util.Iterator  ;
24 import java.sql.PreparedStatement ;
25 import java.sql.SQLException ;
26
27 public class In extends AbstractMultiArgPredicate {
28 private final boolean not;
29
30 public In(boolean not, Identifier identifier) {
31 super(identifier);
32 this.not = not;
33 }
34
35 public boolean evaluate(Document document, Version version, EvaluationContext evaluationContext) throws QueryException {
36 Object value = identifier.evaluate(valueType, document, version, evaluationContext);
37
38 if (value == null)
39 return false;
40
41 return evaluate(value, evaluationContext);
42 }
43
44 private boolean evaluate(Object value, EvaluationContext evaluationContext) throws QueryException {
45 Object [] values = value instanceof Object [] ? (Object [])value : null;
46 Iterator literalsIt = literals.iterator();
47 while (literalsIt.hasNext()) {
48 Literal literal = (Literal)literalsIt.next();
49 if (values == null) {
50 if (literal.evaluate(valueType, evaluationContext).equals(value))
51 return !not;
52 } else {
53 Object literalValue = literal.evaluate(valueType, evaluationContext);
54 for (int i = 0; i < values.length; i++)
55 if (literalValue.equals(values[i]))
56 return !not;
57 }
58 }
59 return not;
60 }
61
62 public void generateSql(StringBuffer sql, SqlGenerationContext context) throws QueryException {
63 sql.append(" (");
64 String preCond = identifier.getSqlPreConditions(context);
65 if (preCond != null)
66 sql.append(preCond).append(" and ");
67 identifier.generateSqlValueExpr(sql, context);
68 if (not)
69 sql.append(" NOT");
70 sql.append(" IN (");
71 final int literalCount = literals.size();
72 for (int i = 0; i < literalCount; i++) {
73 if (i < literalCount - 1)
74 sql.append("?,");
75 else
76 sql.append("?");
77 }
78 sql.append("))");
79 }
80
81 public int bindSql(PreparedStatement stmt, int bindPos, EvaluationContext evaluationContext) throws SQLException , QueryException {
82 bindPos = identifier.bindPreConditions(stmt, bindPos);
83 bindPos = identifier.bindValueExpr(stmt, bindPos, valueType, evaluationContext);
84 Iterator literalsIt = literals.iterator();
85 while (literalsIt.hasNext()) {
86 Literal literal = (Literal)literalsIt.next();
87 if (identifier.isSymbolicIdentifier()) {
88 Object value = identifier.translateSymbolic(literal, evaluationContext);
89 bindPos = Literal.bindLiteral(stmt, bindPos, valueType, value);
90 } else {
91 bindPos = literal.bindValueExpr(stmt, bindPos, valueType, evaluationContext);
92 }
93 }
94 return bindPos;
95 }
96
97 public AclConditionViolation isAclAllowed() {
98 return identifier.isAclAllowed();
99 }
100
101 public Tristate appliesTo(Document document) throws QueryException {
102 if (identifier.canTestAppliesTo()) {
103 boolean result = evaluate(identifier.evaluate(null, document, null, new EvaluationContext()), new EvaluationContext());
104 return result ? Tristate.YES : Tristate.NO;
105 } else {
106 return Tristate.MAYBE;
107 }
108 }
109 }
110 |
Popular Tags |
Java API By Example, From Geeks To Geeks.