01: /**
02: * Copyright 2006 Webmedia Group Ltd.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: **/package org.araneaframework.uilib.list.structure.filter.atomic;
16:
17: import java.util.Map;
18: import org.araneaframework.backend.list.memorybased.Expression;
19: import org.araneaframework.backend.list.memorybased.ExpressionBuilder;
20: import org.araneaframework.uilib.list.util.ExpressionUtil;
21:
22: public class Constant implements ExpressionBuilder {
23: private static final long serialVersionUID = 1L;
24:
25: private String valueId;
26: private Object value;
27:
28: public Constant(String value) {
29: this (null, value);
30: }
31:
32: public Constant(String valueId, Object value) {
33: this .valueId = valueId;
34: this .value = value;
35: }
36:
37: public Expression buildExpression(Map filterInfo) {
38: if (this.value == null) {
39: return ExpressionUtil.nullValue(this.valueId);
40: }
41: return ExpressionUtil.value(this.valueId, this.value);
42: }
43: }
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