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src/share/jaxws_classes/com/sun/xml/internal/ws/policy/PolicyIntersector.java@e530533619ec (annotated)

src/share/jaxws_classes/com/sun/xml/internal/ws/policy/PolicyIntersector.java

Thu, 12 Oct 2017 19:44:07 +0800

author
aoqi
date
Thu, 12 Oct 2017 19:44:07 +0800
changeset 760
e530533619ec
parent 0
373ffda63c9a
permissions
-rw-r--r--

merge

aoqi@0 1 /*
aoqi@0 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0 4 *
aoqi@0 5 * This code is free software; you can redistribute it and/or modify it
aoqi@0 6 * under the terms of the GNU General Public License version 2 only, as
aoqi@0 7 * published by the Free Software Foundation. Oracle designates this
aoqi@0 8 * particular file as subject to the "Classpath" exception as provided
aoqi@0 9 * by Oracle in the LICENSE file that accompanied this code.
aoqi@0 10 *
aoqi@0 11 * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0 14 * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0 15 * accompanied this code).
aoqi@0 16 *
aoqi@0 17 * You should have received a copy of the GNU General Public License version
aoqi@0 18 * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0 20 *
aoqi@0 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0 22 * or visit www.oracle.com if you need additional information or have any
aoqi@0 23 * questions.
aoqi@0 24 */
aoqi@0 25
aoqi@0 26 package com.sun.xml.internal.ws.policy;
aoqi@0 27
aoqi@0 28 import com.sun.xml.internal.ws.policy.privateutil.PolicyLogger;
aoqi@0 29 import java.util.Collection;
aoqi@0 30 import java.util.LinkedList;
aoqi@0 31 import java.util.List;
aoqi@0 32 import java.util.Queue;
aoqi@0 33 import com.sun.xml.internal.ws.policy.privateutil.LocalizationMessages;
aoqi@0 34 import com.sun.xml.internal.ws.policy.sourcemodel.wspolicy.NamespaceVersion;
aoqi@0 35 import java.util.ArrayList;
aoqi@0 36
aoqi@0 37 /**
aoqi@0 38 * The instance of this class is intended to provide policy intersection mechanism.
aoqi@0 39 *
aoqi@0 40 * @author Marek Potociar (marek.potociar@sun.com)
aoqi@0 41 */
aoqi@0 42 public final class PolicyIntersector {
aoqi@0 43 static enum CompatibilityMode {
aoqi@0 44 STRICT,
aoqi@0 45 LAX
aoqi@0 46 }
aoqi@0 47
aoqi@0 48 private static final PolicyIntersector STRICT_INTERSECTOR = new PolicyIntersector(CompatibilityMode.STRICT);
aoqi@0 49 private static final PolicyIntersector LAX_INTERSECTOR = new PolicyIntersector(CompatibilityMode.LAX);
aoqi@0 50 private static final PolicyLogger LOGGER = PolicyLogger.getLogger(PolicyIntersector.class);
aoqi@0 51
aoqi@0 52 private CompatibilityMode mode;
aoqi@0 53
aoqi@0 54 /**
aoqi@0 55 * Prevents direct instantiation of this class from outside
aoqi@0 56 * @param intersectionMode intersection mode
aoqi@0 57 */
aoqi@0 58 private PolicyIntersector(CompatibilityMode intersectionMode) {
aoqi@0 59 this.mode = intersectionMode;
aoqi@0 60 }
aoqi@0 61
aoqi@0 62 /**
aoqi@0 63 * Returns a strict policy intersector that can be used to intersect group of policies.
aoqi@0 64 *
aoqi@0 65 * @return policy intersector instance.
aoqi@0 66 */
aoqi@0 67 public static PolicyIntersector createStrictPolicyIntersector() {
aoqi@0 68 return PolicyIntersector.STRICT_INTERSECTOR;
aoqi@0 69 }
aoqi@0 70
aoqi@0 71 /**
aoqi@0 72 * Returns a strict policy intersector that can be used to intersect group of policies.
aoqi@0 73 *
aoqi@0 74 * @return policy intersector instance.
aoqi@0 75 */
aoqi@0 76 public static PolicyIntersector createLaxPolicyIntersector() {
aoqi@0 77 return PolicyIntersector.LAX_INTERSECTOR;
aoqi@0 78 }
aoqi@0 79
aoqi@0 80 /**
aoqi@0 81 * Performs intersection on the input collection of policies and returns the resulting (intersected) policy. If input policy
aoqi@0 82 * collection contains only a single policy instance, no intersection is performed and the instance is directly returned
aoqi@0 83 * as a method call result.
aoqi@0 84 *
aoqi@0 85 * @param policies collection of policies to be intersected. Must not be {@code null} nor empty, otherwise exception is thrown.
aoqi@0 86 * @return intersected policy as a result of perfromed policy intersection. A {@code null} value is never returned.
aoqi@0 87 *
aoqi@0 88 * @throws IllegalArgumentException in case {@code policies} argument is either {@code null} or empty collection.
aoqi@0 89 */
aoqi@0 90 public Policy intersect(final Policy... policies) {
aoqi@0 91 if (policies == null || policies.length == 0) {
aoqi@0 92 throw LOGGER.logSevereException(new IllegalArgumentException(LocalizationMessages.WSP_0056_NEITHER_NULL_NOR_EMPTY_POLICY_COLLECTION_EXPECTED()));
aoqi@0 93 } else if (policies.length == 1) {
aoqi@0 94 return policies[0];
aoqi@0 95 }
aoqi@0 96
aoqi@0 97 // check for "null" and "empty" policy: if such policy is found return "null" policy,
aoqi@0 98 // or if all policies are "empty", return "empty" policy
aoqi@0 99 boolean found = false;
aoqi@0 100 boolean allPoliciesEmpty = true;
aoqi@0 101 NamespaceVersion latestVersion = null;
aoqi@0 102 for (Policy tested : policies) {
aoqi@0 103 if (tested.isEmpty()) {
aoqi@0 104 found = true;
aoqi@0 105 } else {
aoqi@0 106 if (tested.isNull()) {
aoqi@0 107 found = true;
aoqi@0 108 }
aoqi@0 109 allPoliciesEmpty = false;
aoqi@0 110 }
aoqi@0 111 if (latestVersion == null) {
aoqi@0 112 latestVersion = tested.getNamespaceVersion();
aoqi@0 113 } else if (latestVersion.compareTo(tested.getNamespaceVersion()) < 0) {
aoqi@0 114 latestVersion = tested.getNamespaceVersion();
aoqi@0 115 }
aoqi@0 116
aoqi@0 117 if (found && !allPoliciesEmpty) {
aoqi@0 118 return Policy.createNullPolicy(latestVersion, null, null);
aoqi@0 119 }
aoqi@0 120 }
aoqi@0 121 latestVersion = (latestVersion != null) ? latestVersion : NamespaceVersion.getLatestVersion();
aoqi@0 122 if (allPoliciesEmpty) {
aoqi@0 123 return Policy.createEmptyPolicy(latestVersion, null, null);
aoqi@0 124 }
aoqi@0 125
aoqi@0 126 // simple tests didn't lead to final answer => let's performe some intersecting ;)
aoqi@0 127 final List<AssertionSet> finalAlternatives = new LinkedList<AssertionSet>(policies[0].getContent());
aoqi@0 128 final Queue<AssertionSet> testedAlternatives = new LinkedList<AssertionSet>();
aoqi@0 129 final List<AssertionSet> alternativesToMerge = new ArrayList<AssertionSet>(2);
aoqi@0 130 for (int i = 1; i < policies.length; i++) {
aoqi@0 131 final Collection<AssertionSet> currentAlternatives = policies[i].getContent();
aoqi@0 132
aoqi@0 133 testedAlternatives.clear();
aoqi@0 134 testedAlternatives.addAll(finalAlternatives);
aoqi@0 135 finalAlternatives.clear();
aoqi@0 136
aoqi@0 137 AssertionSet testedAlternative;
aoqi@0 138 while ((testedAlternative = testedAlternatives.poll()) != null) {
aoqi@0 139 for (AssertionSet currentAlternative : currentAlternatives) {
aoqi@0 140 if (testedAlternative.isCompatibleWith(currentAlternative, this.mode)) {
aoqi@0 141 alternativesToMerge.add(testedAlternative);
aoqi@0 142 alternativesToMerge.add(currentAlternative);
aoqi@0 143 finalAlternatives.add(AssertionSet.createMergedAssertionSet(alternativesToMerge));
aoqi@0 144 alternativesToMerge.clear();
aoqi@0 145 }
aoqi@0 146 }
aoqi@0 147 }
aoqi@0 148 }
aoqi@0 149
aoqi@0 150 return Policy.createPolicy(latestVersion, null, null, finalAlternatives);
aoqi@0 151 }
aoqi@0 152 }

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