|
|||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
Evaluator.java | - | - | - | - |
|
1 | // Copyright 2004, 2005 The Apache Software Foundation | |
2 | // | |
3 | // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 | // you may not use this file except in compliance with the License. | |
5 | // You may obtain a copy of the License at | |
6 | // | |
7 | // http://www.apache.org/licenses/LICENSE-2.0 | |
8 | // | |
9 | // Unless required by applicable law or agreed to in writing, software | |
10 | // distributed under the License is distributed on an "AS IS" BASIS, | |
11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 | // See the License for the specific language governing permissions and | |
13 | // limitations under the License. | |
14 | ||
15 | package org.apache.hivemind.conditional; | |
16 | ||
17 | /** | |
18 | * An evaluator is paired with a {@link Node}. The Node provides structure, the Evaluator provides | |
19 | * meaning, interpreting the node. | |
20 | * | |
21 | * @author Howard M. Lewis Ship | |
22 | * @since 1.1 | |
23 | */ | |
24 | public interface Evaluator | |
25 | { | |
26 | /** | |
27 | * Invoked by the Node to evaluate its own value. Typical implementations will extract the | |
28 | * Node's {@link org.apache.hivemind.conditional.Node#getLeft() left} and | |
29 | * {@link org.apache.hivemind.conditional.Node#getRight() right} properties and combine or | |
30 | * otherwise evaluate them. Terminal nodes in the tree will have evaluators that don't do that | |
31 | * but generate a return value internally. | |
32 | */ | |
33 | ||
34 | public boolean evaluate(EvaluationContext context, Node node); | |
35 | } |
|