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20 package org.apache.directory.server.xdbm.search.impl;
21
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23 import org.apache.directory.server.schema.registries.Registries;
24 import org.apache.directory.server.xdbm.Store;
25 import org.apache.directory.server.xdbm.search.Evaluator;
26 import org.apache.directory.server.core.entry.ServerEntry;
27 import org.apache.directory.shared.ldap.filter.*;
28 import org.apache.directory.shared.ldap.NotImplementedException;
29
30 import java.util.List;
31 import java.util.ArrayList;
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39
40 public class EvaluatorBuilder
41 {
42 private final Store<ServerEntry> db;
43 private final Registries registries;
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53
54 public EvaluatorBuilder( Store<ServerEntry> db, Registries registries ) throws Exception
55 {
56 this.db = db;
57 this.registries = registries;
58 }
59
60
61 public Evaluator<? extends ExprNode, ServerEntry> build( ExprNode node ) throws Exception
62 {
63 switch ( node.getAssertionType() )
64 {
65
66
67 case APPROXIMATE:
68 return new ApproximateEvaluator( ( ApproximateNode ) node, db, registries );
69 case EQUALITY:
70 return new EqualityEvaluator( ( EqualityNode ) node, db, registries );
71 case GREATEREQ:
72 return new GreaterEqEvaluator( ( GreaterEqNode ) node, db, registries );
73 case LESSEQ:
74 return new LessEqEvaluator( ( LessEqNode ) node, db, registries );
75 case PRESENCE:
76 return new PresenceEvaluator( ( PresenceNode ) node, db, registries );
77 case SCOPE:
78 if ( ( ( ScopeNode ) node ).getScope() == SearchScope.ONELEVEL )
79 {
80 return new OneLevelScopeEvaluator<ServerEntry>( db, ( ScopeNode ) node );
81 }
82 else
83 {
84 return new SubtreeScopeEvaluator<ServerEntry>( db, ( ScopeNode ) node );
85 }
86 case SUBSTRING:
87 return new SubstringEvaluator( ( SubstringNode ) node, db, registries );
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89
90
91 case AND:
92 return buildAndEvaluator( ( AndNode ) node );
93 case NOT:
94 return new NotEvaluator( ( NotNode ) node, build( ( ( NotNode ) node).getFirstChild() ) );
95 case OR:
96 return buildOrEvaluator( ( OrNode ) node );
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98
99
100 case ASSERTION:
101 case EXTENSIBLE:
102 throw new NotImplementedException();
103
104 default:
105 throw new IllegalStateException( "Unknown assertion type: " + node.getAssertionType() );
106 }
107 }
108
109
110 AndEvaluator buildAndEvaluator( AndNode node ) throws Exception
111 {
112 List<ExprNode> children = node.getChildren();
113 List<Evaluator<? extends ExprNode,ServerEntry>> evaluators =
114 new ArrayList<Evaluator<? extends ExprNode,ServerEntry>>( children.size() );
115 for ( ExprNode child : children )
116 {
117 evaluators.add( build( child ) );
118 }
119 return new AndEvaluator( node, evaluators );
120 }
121
122
123 OrEvaluator buildOrEvaluator( OrNode node ) throws Exception
124 {
125 List<ExprNode> children = node.getChildren();
126 List<Evaluator<? extends ExprNode,ServerEntry>> evaluators =
127 new ArrayList<Evaluator<? extends ExprNode,ServerEntry>>( children.size() );
128 for ( ExprNode child : children )
129 {
130 evaluators.add( build( child ) );
131 }
132 return new OrEvaluator( node, evaluators );
133 }
134 }