01: /**
02: * Licensed to the Apache Software Foundation (ASF) under one
03: * or more contributor license agreements. See the NOTICE file
04: * distributed with this work for additional information
05: * regarding copyright ownership. The ASF licenses this file
06: * to you under the Apache License, Version 2.0 (the
07: * "License"); you may not use this file except in compliance
08: * with the License. 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,
13: * software distributed under the License is distributed on an
14: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15: * KIND, either express or implied. See the License for the
16: * specific language governing permissions and limitations
17: * under the License.
18: */package org.apache.cxf.ws.policy.selector;
19:
20: import java.util.Collection;
21: import java.util.Iterator;
22: import java.util.List;
23:
24: import org.apache.cxf.helpers.CastUtils;
25: import org.apache.cxf.ws.policy.AlternativeSelector;
26: import org.apache.cxf.ws.policy.Assertor;
27: import org.apache.cxf.ws.policy.PolicyEngine;
28: import org.apache.neethi.Assertion;
29: import org.apache.neethi.Policy;
30:
31: /**
32: *
33: */
34: public class MinimalAlternativeSelector implements AlternativeSelector {
35:
36: public Collection<Assertion> selectAlternative(Policy policy,
37: PolicyEngine engine, Assertor assertor) {
38: Collection<Assertion> choice = null;
39: Iterator alternatives = policy.getAlternatives();
40: while (alternatives.hasNext()) {
41: List<Assertion> alternative = CastUtils.cast(
42: (List) alternatives.next(), Assertion.class);
43: if (engine.supportsAlternative(alternative, assertor)
44: && (null == choice || alternative.size() < choice
45: .size())) {
46: choice = alternative;
47: }
48: }
49: return choice;
50: }
51: }
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