01: package org.drools.ruleflow.common.datatype.impl.type;
02:
03: /*
04: * Copyright 2005 JBoss Inc
05: *
06: * Licensed under the Apache License, Version 2.0 (the "License");
07: * you may not use this file except in compliance with the License.
08: * You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing, software
13: * distributed under the License is distributed on an "AS IS" BASIS,
14: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15: * See the License for the specific language governing permissions and
16: * limitations under the License.
17: */
18:
19: import java.io.Serializable;
20: import java.util.Iterator;
21: import java.util.List;
22:
23: import org.drools.ruleflow.common.datatype.DataType;
24:
25: /**
26: * Representation of a list datatype.
27: * All elements in the list must have the same datatype.
28: *
29: * @author <a href="mailto:kris_verlaenen@hotmail.com">Kris Verlaenen</a>
30: */
31: public class ListDataType implements DataType, Serializable {
32:
33: private static final long serialVersionUID = 400L;
34:
35: private DataType dataType;
36:
37: public void setDataType(final DataType dataType) {
38: this .dataType = dataType;
39: }
40:
41: public DataType getDataType() {
42: return this .dataType;
43: }
44:
45: public boolean verifyDataType(final Object value) {
46: if (value == null) {
47: return true;
48: }
49: if (value instanceof List) {
50: for (final Iterator it = ((List) value).iterator(); it
51: .hasNext();) {
52: if (!this .dataType.verifyDataType(it.next())) {
53: return false;
54: }
55: }
56: return true;
57: }
58: return false;
59: }
60: }
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