1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.policy.wspolicy;
import java.util.ArrayList;
import java.util.List;
import javax.xml.namespace.QName;
import org.apache.neethi.Policy;
import org.apache.tuscany.sca.assembly.Component;
import org.apache.tuscany.sca.assembly.Endpoint;
import org.apache.tuscany.sca.assembly.EndpointReference;
import org.apache.tuscany.sca.assembly.Implementation;
import org.apache.tuscany.sca.assembly.builder.BuilderContext;
import org.apache.tuscany.sca.assembly.builder.PolicyBuilder;
import org.apache.tuscany.sca.policy.PolicyExpression;
import org.apache.tuscany.sca.policy.PolicySet;
import org.apache.tuscany.sca.policy.PolicySubject;
/**
* Processing for WS-Policy objects
* TBD
*/
public class WSPolicyBuilder implements PolicyBuilder<Policy> {
public boolean build(Endpoint endpoint, BuilderContext context) {
List<WSPolicy> polices = getPolicies(endpoint);
System.out.println(endpoint + ": " + polices);
return true;
}
public boolean build(EndpointReference endpointReference, BuilderContext context) {
List<WSPolicy> polices = getPolicies(endpointReference);
System.out.println(endpointReference + ": " + polices);
return true;
}
public boolean build(Component component, Implementation implementation, BuilderContext context) {
List<WSPolicy> polices = getPolicies(implementation);
System.out.println(implementation + ": " + polices);
return true;
}
public QName getPolicyType() {
return WSPolicy.WS_POLICY_QNAME;
}
public List<QName> getSupportedBindings() {
return null;
}
public boolean build(EndpointReference endpointReference, Endpoint endpoint, BuilderContext context) {
// TODO - neethi doesn't include code for matching ws policy
// cxf have the class Intersector http://svn.apache.org/repos/asf/cxf/trunk/api/src/main/java/org/apache/cxf/ws/policy/Intersector.java
// but this does its work based on the cxf AssertionBuilders and extension
// registry mechanism. I don't want to commit to that at the moment.
//
// At the moment we do the simplest top level QName based matching
// match EPR policy sets
for (PolicySet eprPolicySet : endpointReference.getPolicySets()){
for (PolicySet epPolicySet : endpoint.getPolicySets()){
if (!build(eprPolicySet, epPolicySet)){
return false;
}
}
}
// match EP policy sets
for (PolicySet epPolicySet : endpoint.getPolicySets()){
for (PolicySet eprPolicySet : endpointReference.getPolicySets()){
if (!build(epPolicySet, eprPolicySet)){
return false;
}
}
}
return true;
}
private boolean build(PolicySet policySet1, PolicySet policySet2){
// extract the ws policy expressions out of the policy sets
List<PolicyExpression> policyExpressions1 = new ArrayList<PolicyExpression>();
List<PolicyExpression> policyExpressions2 = new ArrayList<PolicyExpression>();
for (PolicyExpression policyExpression : policySet1.getPolicies()){
if (policyExpression.getName().equals(getPolicyType())){
policyExpressions1.add(policyExpression);
}
}
for (PolicyExpression policyExpression : policySet2.getPolicies()){
if (policyExpression.getName().equals(getPolicyType())){
policyExpressions2.add(policyExpression);
}
}
// Match the first set of expressions against the second set
for (PolicyExpression policyExpression1 : policyExpressions1){
for (PolicyExpression policyExpression2 : policyExpressions2){
if (!build((WSPolicy)policyExpression1.getPolicy(),
(WSPolicy)policyExpression2.getPolicy())){
return false;
}
}
}
// TODO set the reference policy set to include an interception of the
// ws policy sets discovered here
// Do we really need to do this?
// The method is called in both directions (reference to service and
// service to reference) so would need to fix that
return true;
}
private List<WSPolicy> getPolicies(PolicySubject subject) {
List<WSPolicy> polices = new ArrayList<WSPolicy>();
for (PolicySet ps : subject.getPolicySets()) {
for (PolicyExpression exp : ps.getPolicies()) {
if (getPolicyType().equals(exp.getName())) {
polices.add((WSPolicy)exp.getPolicy());
}
}
}
return polices;
}
private boolean build(WSPolicy wsPolicy1, WSPolicy wsPolicy2){
// TODO - cheating here as we assume a flat policy structure
// we've read all the policy assertions into Tuscany models
// in the reader (without taking account of alternatives)
// so we just compare those here
// The real implementation of this comparison depends on how
// we decide to represent the ws policy hierarchy
for (Object policyAssertion1 : wsPolicy1.getPolicyAssertions()){
boolean matched = false;
for (Object policyAssertion2 : wsPolicy2.getPolicyAssertions()){
if (policyAssertion1.getClass() == policyAssertion2.getClass()){
matched = true;
break;
}
}
if(!matched){
return false;
}
}
return true;
}
}
|
