01: /**********************************************************************
02: Copyright (c) 2007 Andy Jefferson and others. All rights reserved.
03: Licensed under the Apache License, Version 2.0 (the "License");
04: you may not use this file except in compliance with the License.
05: You may obtain a copy of the License at
06:
07: http://www.apache.org/licenses/LICENSE-2.0
08:
09: 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: Contributors:
16: ...
17: **********************************************************************/package org.jpox.store.mapping;
18:
19: import java.math.BigDecimal;
20:
21: import org.jpox.ClassLoaderResolver;
22: import org.jpox.ClassNameConstants;
23: import org.jpox.store.expression.FloatingPointLiteral;
24: import org.jpox.store.expression.LogicSetExpression;
25: import org.jpox.store.expression.NumericExpression;
26: import org.jpox.store.expression.QueryExpression;
27: import org.jpox.store.expression.ScalarExpression;
28:
29: /**
30: * Mapping for Number type.
31: *
32: * @version $Revision: 1.1 $
33: **/
34: public class NumberMapping extends SingleFieldMapping implements
35: SimpleDatastoreRepresentation {
36: private static BigDecimal mappingSampleValue = new BigDecimal(0.0);
37:
38: public Object getSampleValue(ClassLoaderResolver clr) {
39: return mappingSampleValue;
40: }
41:
42: public ScalarExpression newLiteral(QueryExpression qs, Object value) {
43: ScalarExpression expr = new FloatingPointLiteral(qs,
44: (BigDecimal) value);
45: return expr;
46: }
47:
48: public ScalarExpression newScalarExpression(QueryExpression qs,
49: LogicSetExpression te) {
50: ScalarExpression expr = new NumericExpression(qs, this , te);
51: return expr;
52: }
53:
54: /**
55: * Accessor for the name of the java-type actually used when mapping the particular datastore
56: * field. This java-type must have an entry in the datastore mappings.
57: * @param index requested datastore field index.
58: * @return the name of java-type for the requested datastore field.
59: */
60: public String getJavaTypeForDatastoreMapping(int index) {
61: // Assume it has the highest precision possible so we can store all subtypes of Number
62: return ClassNameConstants.JAVA_MATH_BIGDECIMAL;
63: }
64:
65: public Class getJavaType() {
66: return Number.class;
67: }
68: }
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