jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/xml/internal/ws/policy/PolicyIntersector.java@e530533619ec

     1 /*

     2  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.xml.internal.ws.policy;

    28 import com.sun.xml.internal.ws.policy.privateutil.PolicyLogger;

    29 import java.util.Collection;

    30 import java.util.LinkedList;

    31 import java.util.List;

    32 import java.util.Queue;

    33 import com.sun.xml.internal.ws.policy.privateutil.LocalizationMessages;

    34 import com.sun.xml.internal.ws.policy.sourcemodel.wspolicy.NamespaceVersion;

    35 import java.util.ArrayList;

    37 /**

    38  * The instance of this class is intended to provide policy intersection mechanism.

    39  *

    40  * @author Marek Potociar (marek.potociar@sun.com)

    41  */

    42 public final class PolicyIntersector {

    43     static enum CompatibilityMode {

    44         STRICT,

    45         LAX

    46     }

    48     private static final PolicyIntersector STRICT_INTERSECTOR = new PolicyIntersector(CompatibilityMode.STRICT);

    49     private static final PolicyIntersector LAX_INTERSECTOR = new PolicyIntersector(CompatibilityMode.LAX);

    50     private static final PolicyLogger LOGGER = PolicyLogger.getLogger(PolicyIntersector.class);

    52     private CompatibilityMode mode;

    54     /**

    55      * Prevents direct instantiation of this class from outside

    56      * @param intersectionMode intersection mode

    57      */

    58     private PolicyIntersector(CompatibilityMode intersectionMode) {

    59         this.mode = intersectionMode;

    60     }

    62     /**

    63      * Returns a strict policy intersector that can be used to intersect group of policies.

    64      *

    65      * @return policy intersector instance.

    66      */

    67     public static PolicyIntersector createStrictPolicyIntersector() {

    68         return PolicyIntersector.STRICT_INTERSECTOR;

    69     }

    71     /**

    72      * Returns a strict policy intersector that can be used to intersect group of policies.

    73      *

    74      * @return policy intersector instance.

    75      */

    76     public static PolicyIntersector createLaxPolicyIntersector() {

    77         return PolicyIntersector.LAX_INTERSECTOR;

    78     }

    80     /**

    81      * Performs intersection on the input collection of policies and returns the resulting (intersected) policy. If input policy

    82      * collection contains only a single policy instance, no intersection is performed and the instance is directly returned

    83      * as a method call result.

    84      *

    85      * @param policies collection of policies to be intersected. Must not be {@code null} nor empty, otherwise exception is thrown.

    86      * @return intersected policy as a result of perfromed policy intersection. A {@code null} value is never returned.

    87      *

    88      * @throws IllegalArgumentException in case {@code policies} argument is either {@code null} or empty collection.

    89      */

    90     public Policy intersect(final Policy... policies) {

    91         if (policies == null || policies.length == 0) {

    92             throw LOGGER.logSevereException(new IllegalArgumentException(LocalizationMessages.WSP_0056_NEITHER_NULL_NOR_EMPTY_POLICY_COLLECTION_EXPECTED()));

    93         } else if (policies.length == 1) {

    94             return policies[0];

    95         }

    97         // check for "null" and "empty" policy: if such policy is found return "null" policy,

    98         // or if all policies are "empty", return "empty" policy

    99         boolean found = false;

   100         boolean allPoliciesEmpty = true;

   101         NamespaceVersion latestVersion = null;

   102         for (Policy tested : policies) {

   103             if (tested.isEmpty()) {

   104                 found = true;

   105             } else {

   106                 if (tested.isNull()) {

   107                     found = true;

   108                 }

   109                 allPoliciesEmpty = false;

   110             }

   111             if (latestVersion == null) {

   112                 latestVersion = tested.getNamespaceVersion();

   113             } else if (latestVersion.compareTo(tested.getNamespaceVersion()) < 0) {

   114                 latestVersion = tested.getNamespaceVersion();

   115             }

   117             if (found && !allPoliciesEmpty) {

   118                 return Policy.createNullPolicy(latestVersion, null, null);

   119             }

   120         }

   121         latestVersion = (latestVersion != null) ? latestVersion : NamespaceVersion.getLatestVersion();

   122         if (allPoliciesEmpty) {

   123             return Policy.createEmptyPolicy(latestVersion, null, null);

   124         }

   126         // simple tests didn't lead to final answer => let's performe some intersecting ;)

   127         final List<AssertionSet> finalAlternatives = new LinkedList<AssertionSet>(policies[0].getContent());

   128         final Queue<AssertionSet> testedAlternatives = new LinkedList<AssertionSet>();

   129         final List<AssertionSet> alternativesToMerge = new ArrayList<AssertionSet>(2);

   130         for (int i = 1; i < policies.length; i++) {

   131             final Collection<AssertionSet> currentAlternatives = policies[i].getContent();

   133             testedAlternatives.clear();

   134             testedAlternatives.addAll(finalAlternatives);

   135             finalAlternatives.clear();

   137             AssertionSet testedAlternative;

   138             while ((testedAlternative = testedAlternatives.poll()) != null) {

   139                 for (AssertionSet currentAlternative : currentAlternatives) {

   140                     if (testedAlternative.isCompatibleWith(currentAlternative, this.mode)) {

   141                         alternativesToMerge.add(testedAlternative);

   142                         alternativesToMerge.add(currentAlternative);

   143                         finalAlternatives.add(AssertionSet.createMergedAssertionSet(alternativesToMerge));

   144                         alternativesToMerge.clear();

   145                     }

   146                 }

   147             }

   148         }

   150         return Policy.createPolicy(latestVersion, null, null, finalAlternatives);

   151     }

   152 }

Mercurial > jdk8-mips64-public > jaxws / file revision

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

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