1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/ws/policy/PolicyMerger.java Wed Apr 27 01:27:09 2016 +0800
1.3 @@ -0,0 +1,106 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package com.sun.xml.internal.ws.policy;
1.30 +
1.31 +import com.sun.xml.internal.ws.policy.privateutil.PolicyUtils;
1.32 +import com.sun.xml.internal.ws.policy.sourcemodel.wspolicy.NamespaceVersion;
1.33 +import java.util.ArrayList;
1.34 +import java.util.Collection;
1.35 +import java.util.LinkedList;
1.36 +
1.37 +/**
1.38 + * Merge policies and return the effective policy.
1.39 + *
1.40 + * WS-PolicyAttachment defines a merge algorithm for WSDL 1.1 policy attachments.
1.41 + */
1.42 +public final class PolicyMerger {
1.43 + private static final PolicyMerger merger = new PolicyMerger();
1.44 +
1.45 + /**
1.46 + * This private constructor is to avoid direct class instantiation from outsied of the package
1.47 + */
1.48 + private PolicyMerger() {
1.49 + // nothing to instantiate
1.50 + }
1.51 +
1.52 + /**
1.53 + * Factory method for obtaining thread-safe policy merger instance.
1.54 + *
1.55 + * @return policy merger instance.
1.56 + */
1.57 + public static PolicyMerger getMerger() {
1.58 + return merger;
1.59 + }
1.60 +
1.61 + /**
1.62 + * Takes collection of policies and merges them into a single policy using algorithm described in
1.63 + * WS-PolicyAttachment specification. None of the original policies in the collection are modified in
1.64 + * any way.
1.65 + *
1.66 + * The newly created policy has an ID that is a concatentation of all merged policy IDs.
1.67 + *
1.68 + * @param policies collection of policies to be merged. The collection must not contain '{@code null}' elements!
1.69 + * @return merged policy containing combination of policy alternatives stored in all input policies.
1.70 + * If provided collection of policies is {@code null} or empty, returns {@code null}. If provided
1.71 + * collection of policies contains only single policy, the policy is returned.
1.72 + */
1.73 + public Policy merge(final Collection<Policy> policies) {
1.74 + if (policies == null || policies.isEmpty()) {
1.75 + return null;
1.76 + } else if (policies.size() == 1) {
1.77 + return policies.iterator().next();
1.78 + }
1.79 +
1.80 + final Collection<Collection<AssertionSet>> alternativeSets = new LinkedList<Collection<AssertionSet>>();
1.81 + final StringBuilder id = new StringBuilder();
1.82 + NamespaceVersion mergedVersion = policies.iterator().next().getNamespaceVersion();
1.83 + for (Policy policy : policies) {
1.84 + alternativeSets.add(policy.getContent());
1.85 + if (mergedVersion.compareTo(policy.getNamespaceVersion()) < 0) {
1.86 + mergedVersion = policy.getNamespaceVersion();
1.87 + }
1.88 + final String policyId = policy.getId();
1.89 + if (policyId != null) {
1.90 + if (id.length() > 0) {
1.91 + id.append('-');
1.92 + }
1.93 + id.append(policyId);
1.94 + }
1.95 + }
1.96 +
1.97 + final Collection<Collection<AssertionSet>> combinedAlternatives = PolicyUtils.Collections.combine(null, alternativeSets, false);
1.98 +
1.99 + if (combinedAlternatives == null || combinedAlternatives.isEmpty()) {
1.100 + return Policy.createNullPolicy(mergedVersion, null, id.length() == 0 ? null : id.toString());
1.101 + } else {
1.102 + final Collection<AssertionSet> mergedSetList = new ArrayList<AssertionSet>(combinedAlternatives.size());
1.103 + for (Collection<AssertionSet> toBeMerged : combinedAlternatives) {
1.104 + mergedSetList.add(AssertionSet.createMergedAssertionSet(toBeMerged));
1.105 + }
1.106 + return Policy.createPolicy(mergedVersion, null, id.length() == 0 ? null : id.toString(), mergedSetList);
1.107 + }
1.108 + }
1.109 +}
