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

src/share/jaxws_classes/com/sun/xml/internal/ws/policy/PolicyMerger.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.PolicyUtils;
aoqi@0	29	import com.sun.xml.internal.ws.policy.sourcemodel.wspolicy.NamespaceVersion;
aoqi@0	30	import java.util.ArrayList;
aoqi@0	31	import java.util.Collection;
aoqi@0	32	import java.util.LinkedList;
aoqi@0	33
aoqi@0	34	/**
aoqi@0	35	* Merge policies and return the effective policy.
aoqi@0	36	*
aoqi@0	37	* WS-PolicyAttachment defines a merge algorithm for WSDL 1.1 policy attachments.
aoqi@0	38	*/
aoqi@0	39	public final class PolicyMerger {
aoqi@0	40	private static final PolicyMerger merger = new PolicyMerger();
aoqi@0	41
aoqi@0	42	/**
aoqi@0	43	* This private constructor is to avoid direct class instantiation from outsied of the package
aoqi@0	44	*/
aoqi@0	45	private PolicyMerger() {
aoqi@0	46	// nothing to instantiate
aoqi@0	47	}
aoqi@0	48
aoqi@0	49	/**
aoqi@0	50	* Factory method for obtaining thread-safe policy merger instance.
aoqi@0	51	*
aoqi@0	52	* @return policy merger instance.
aoqi@0	53	*/
aoqi@0	54	public static PolicyMerger getMerger() {
aoqi@0	55	return merger;
aoqi@0	56	}
aoqi@0	57
aoqi@0	58	/**
aoqi@0	59	* Takes collection of policies and merges them into a single policy using algorithm described in
aoqi@0	60	* WS-PolicyAttachment specification. None of the original policies in the collection are modified in
aoqi@0	61	* any way.
aoqi@0	62	*
aoqi@0	63	* The newly created policy has an ID that is a concatentation of all merged policy IDs.
aoqi@0	64	*
aoqi@0	65	* @param policies collection of policies to be merged. The collection must not contain '{@code null}' elements!
aoqi@0	66	* @return merged policy containing combination of policy alternatives stored in all input policies.
aoqi@0	67	* If provided collection of policies is {@code null} or empty, returns {@code null}. If provided
aoqi@0	68	* collection of policies contains only single policy, the policy is returned.
aoqi@0	69	*/
aoqi@0	70	public Policy merge(final Collection<Policy> policies) {
aoqi@0	71	if (policies == null || policies.isEmpty()) {
aoqi@0	72	return null;
aoqi@0	73	} else if (policies.size() == 1) {
aoqi@0	74	return policies.iterator().next();
aoqi@0	75	}
aoqi@0	76
aoqi@0	77	final Collection<Collection<AssertionSet>> alternativeSets = new LinkedList<Collection<AssertionSet>>();
aoqi@0	78	final StringBuilder id = new StringBuilder();
aoqi@0	79	NamespaceVersion mergedVersion = policies.iterator().next().getNamespaceVersion();
aoqi@0	80	for (Policy policy : policies) {
aoqi@0	81	alternativeSets.add(policy.getContent());
aoqi@0	82	if (mergedVersion.compareTo(policy.getNamespaceVersion()) < 0) {
aoqi@0	83	mergedVersion = policy.getNamespaceVersion();
aoqi@0	84	}
aoqi@0	85	final String policyId = policy.getId();
aoqi@0	86	if (policyId != null) {
aoqi@0	87	if (id.length() > 0) {
aoqi@0	88	id.append('-');
aoqi@0	89	}
aoqi@0	90	id.append(policyId);
aoqi@0	91	}
aoqi@0	92	}
aoqi@0	93
aoqi@0	94	final Collection<Collection<AssertionSet>> combinedAlternatives = PolicyUtils.Collections.combine(null, alternativeSets, false);
aoqi@0	95
aoqi@0	96	if (combinedAlternatives == null || combinedAlternatives.isEmpty()) {
aoqi@0	97	return Policy.createNullPolicy(mergedVersion, null, id.length() == 0 ? null : id.toString());
aoqi@0	98	} else {
aoqi@0	99	final Collection<AssertionSet> mergedSetList = new ArrayList<AssertionSet>(combinedAlternatives.size());
aoqi@0	100	for (Collection<AssertionSet> toBeMerged : combinedAlternatives) {
aoqi@0	101	mergedSetList.add(AssertionSet.createMergedAssertionSet(toBeMerged));
aoqi@0	102	}
aoqi@0	103	return Policy.createPolicy(mergedVersion, null, id.length() == 0 ? null : id.toString(), mergedSetList);
aoqi@0	104	}
aoqi@0	105	}
aoqi@0	106	}