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/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.xml.ws.policy.sourcemodel;
import com.sun.xml.ws.policy.sourcemodel.wspolicy.NamespaceVersion;
import com.sun.xml.ws.policy.PolicyConstants;
import com.sun.xml.ws.policy.PolicyException;
import com.sun.xml.ws.policy.privateutil.LocalizationMessages;
import com.sun.xml.ws.policy.privateutil.PolicyLogger;
import com.sun.xml.ws.policy.privateutil.PolicyUtils;
import com.sun.xml.ws.policy.spi.PrefixMapper;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Queue;
import java.util.ServiceLoader;
import java.util.Set;
import javax.xml.namespace.QName;
/**
* This class is a root of unmarshaled policy source structure. Each instance of the class contains factory method
* to create new {@link com.sun.xml.ws.policy.sourcemodel.ModelNode} instances associated with the actual model instance.
*
* @author Marek Potociar
* @author Fabian Ritzmann
*/
public class PolicySourceModel implements Cloneable {
private static final PolicyLogger LOGGER = PolicyLogger.getLogger(PolicySourceModel.class);
private static final Map DEFAULT_NAMESPACE_TO_PREFIX = new HashMap();
static {
for (PrefixMapper mapper: ServiceLoader.load(PrefixMapper.class)) {
DEFAULT_NAMESPACE_TO_PREFIX.putAll(mapper.getPrefixMap());
}
for (NamespaceVersion version : NamespaceVersion.values()) {
DEFAULT_NAMESPACE_TO_PREFIX.put(version.toString(), version.getDefaultNamespacePrefix());
}
DEFAULT_NAMESPACE_TO_PREFIX.put(PolicyConstants.WSU_NAMESPACE_URI,
PolicyConstants.WSU_NAMESPACE_PREFIX);
DEFAULT_NAMESPACE_TO_PREFIX.put(PolicyConstants.SUN_POLICY_NAMESPACE_URI,
PolicyConstants.SUN_POLICY_NAMESPACE_PREFIX);
}
// Map namespaces to prefixes
private final Map namespaceToPrefix =
new HashMap(DEFAULT_NAMESPACE_TO_PREFIX);
private ModelNode rootNode;
private final String policyId;
private final String policyName;
private final NamespaceVersion nsVersion;
private final List references = new LinkedList(); // links to policy reference nodes
private boolean expanded = false;
/**
* Factory method that creates new policy source model instance.
*
* This method is only intended to be used by code that has no dependencies on
* JAX-WS. Otherwise use com.sun.xml.ws.policy.api.SourceModel.
*
* @param nsVersion The policy version
* @return Newly created policy source model instance.
*/
public static PolicySourceModel createPolicySourceModel(final NamespaceVersion nsVersion) {
return new PolicySourceModel(nsVersion);
}
/**
* Factory method that creates new policy source model instance and initializes it according to parameters provided.
*
* This method is only intended to be used by code that has no dependencies on
* JAX-WS. Otherwise use com.sun.xml.ws.policy.api.SourceModel.
*
* @param nsVersion The policy version
* @param policyId local policy identifier - relative URI. May be {@code null}.
* @param policyName global policy identifier - absolute policy expression URI. May be {@code null}.
* @return Newly created policy source model instance with its name and id properly set.
*/
public static PolicySourceModel createPolicySourceModel(final NamespaceVersion nsVersion, final String policyId, final String policyName) {
return new PolicySourceModel(nsVersion, policyId, policyName);
}
/**
* Constructor that creates a new policy source model instance without any
* id or name identifier. The namespace-to-prefix map is initialized with mapping
* of policy namespace to the default value set by
* {@link PolicyConstants#POLICY_NAMESPACE_PREFIX POLICY_NAMESPACE_PREFIX constant}.
*
* @param nsVersion The WS-Policy version.
*/
private PolicySourceModel(NamespaceVersion nsVersion) {
this(nsVersion, null, null);
}
/**
* Constructor that creates a new policy source model instance with given
* id or name identifier.
*
* @param nsVersion The WS-Policy version.
* @param policyId Relative policy reference within an XML document. May be {@code null}.
* @param policyName Absolute IRI of policy expression. May be {@code null}.
*/
private PolicySourceModel(NamespaceVersion nsVersion, String policyId, String policyName) {
this(nsVersion, policyId, policyName, null);
}
/**
* Constructor that creates a new policy source model instance with given
* id or name identifier and a set of PrefixMappers.
*
* This constructor is intended to be used by the JAX-WS com.sun.xml.ws.policy.api.SourceModel.
*
* @param nsVersion The WS-Policy version.
* @param policyId Relative policy reference within an XML document. May be {@code null}.
* @param policyName Absolute IRI of policy expression. May be {@code null}.
* @param prefixMappers A collection of PrefixMappers to be used with this instance. May be {@code null}.
*/
protected PolicySourceModel(NamespaceVersion nsVersion, String policyId,
String policyName, Collection prefixMappers) {
this.rootNode = ModelNode.createRootPolicyNode(this);
this.nsVersion = nsVersion;
this.policyId = policyId;
this.policyName = policyName;
if (prefixMappers != null) {
for (PrefixMapper prefixMapper : prefixMappers) {
this.namespaceToPrefix.putAll(prefixMapper.getPrefixMap());
}
}
}
/**
* Returns a root node of this policy source model. It is allways of POLICY type.
*
* @return root policy source model node - allways of POLICY type.
*/
public ModelNode getRootNode() {
return rootNode;
}
/**
* Returns a policy name of this policy source model.
*
* @return policy name.
*/
public String getPolicyName() {
return policyName;
}
/**
* Returns a policy ID of this policy source model.
*
* @return policy ID.
*/
public String getPolicyId() {
return policyId;
}
/**
* Returns an original namespace version of this policy source model.
*
* @return namespace version.
*/
public NamespaceVersion getNamespaceVersion() {
return nsVersion;
}
/**
* Provides information about how namespaces used in this {@link PolicySourceModel}
* instance should be mapped to their default prefixes when marshalled.
*
* @return immutable map that holds information about namespaces used in the
* model and their mapping to prefixes that should be used when marshalling
* this model.
* @throws PolicyException Thrown if one of the prefix mappers threw an exception.
*/
Map getNamespaceToPrefixMapping() throws PolicyException {
final Map nsToPrefixMap = new HashMap();
final Collection namespaces = getUsedNamespaces();
for (String namespace : namespaces) {
final String prefix = getDefaultPrefix(namespace);
if (prefix != null) {
nsToPrefixMap.put(namespace, prefix);
}
}
return nsToPrefixMap;
}
/**
* An {@code Object.equals(Object obj)} method override.
*
* When child nodes are tested for equality, the parent policy source model is not considered. Thus two different
* policy source models instances may be equal based on their node content.
*/
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof PolicySourceModel)) {
return false;
}
boolean result = true;
final PolicySourceModel that = (PolicySourceModel) obj;
result = result && ((this.policyId == null) ? that.policyId == null : this.policyId.equals(that.policyId));
result = result && ((this.policyName == null) ? that.policyName == null : this.policyName.equals(that.policyName));
result = result && this.rootNode.equals(that.rootNode);
return result;
}
/**
* An {@code Object.hashCode()} method override.
*/
@Override
public int hashCode() {
int result = 17;
result = 37 * result + ((this.policyId == null) ? 0 : this.policyId.hashCode());
result = 37 * result + ((this.policyName == null) ? 0 : this.policyName.hashCode());
result = 37 * result + this.rootNode.hashCode();
return result;
}
/**
* Returns a string representation of the object. In general, the toString method
* returns a string that "textually represents" this object.
*
* @return a string representation of the object.
*/
@Override
public String toString() {
final String innerIndent = PolicyUtils.Text.createIndent(1);
final StringBuffer buffer = new StringBuffer(60);
buffer.append("Policy source model {").append(PolicyUtils.Text.NEW_LINE);
buffer.append(innerIndent).append("policy id = '").append(policyId).append('\'').append(PolicyUtils.Text.NEW_LINE);
buffer.append(innerIndent).append("policy name = '").append(policyName).append('\'').append(PolicyUtils.Text.NEW_LINE);
rootNode.toString(1, buffer).append(PolicyUtils.Text.NEW_LINE).append('}');
return buffer.toString();
}
@Override
protected PolicySourceModel clone() throws CloneNotSupportedException {
final PolicySourceModel clone = (PolicySourceModel) super.clone();
clone.rootNode = this.rootNode.clone();
try {
clone.rootNode.setParentModel(clone);
} catch (IllegalAccessException e) {
throw LOGGER.logSevereException(new CloneNotSupportedException(LocalizationMessages.WSP_0013_UNABLE_TO_SET_PARENT_MODEL_ON_ROOT()), e);
}
return clone;
}
/**
* Returns a boolean value indicating whether this policy source model contains references to another policy source models.
*
* Every source model that references other policies must be expanded before it can be translated into a Policy objects. See
* {@link #expand(PolicySourceModelContext)} and {@link #isExpanded()} for more details.
*
* @return {@code true} or {@code false} depending on whether this policy source model contains references to another policy source models.
*/
public boolean containsPolicyReferences() {
return !references.isEmpty();
}
/**
* Returns a boolean value indicating whether this policy source model contains is already expanded (i.e. contains no unexpanded
* policy references) or not. This means that if model does not originally contain any policy references, it is considered as expanded,
* thus this method returns {@code true} in such case. Also this method does not check whether the references policy source models are expanded
* as well, so after expanding this model a value of {@code true} is returned even if referenced models are not expanded yet. Thus each model
* can be considered to be fully expanded only if all policy source models stored in PolicySourceModelContext instance are expanded, provided the
* PolicySourceModelContext instance contains full set of policy source models.
*
* Every source model that references other policies must be expanded before it can be translated into a Policy object. See
* {@link #expand(PolicySourceModelContext)} and {@link #containsPolicyReferences()} for more details.
*
* @return {@code true} or {@code false} depending on whether this policy source model contains is expanded or not.
*/
private boolean isExpanded() {
return references.isEmpty() || expanded;
}
/**
* Expands current policy model. This means, that if this model contains any (unexpanded) policy references, then the method expands those
* references by placing the content of the referenced policy source models under the policy reference nodes. This operation merely creates
* a link between this and referenced policy source models. Thus any change in the referenced models will be visible wihtin this model as well.
*
* Please, notice that the method does not check if the referenced models are already expanded nor does the method try to expand unexpanded
* referenced models. This must be preformed manually within client's code. Consecutive calls of this method will have no effect.
*
* Every source model that references other policies must be expanded before it can be translated into a Policy object. See
* {@link #isExpanded()} and {@link #containsPolicyReferences()} for more details.
*
* @param context a policy source model context holding the set of unmarshalled policy source models within the same context.
* @throws PolicyException Thrown if a referenced policy could not be resolved
*/
public synchronized void expand(final PolicySourceModelContext context) throws PolicyException {
if (!isExpanded()) {
for (ModelNode reference : references) {
final PolicyReferenceData refData = reference.getPolicyReferenceData();
final String digest = refData.getDigest();
PolicySourceModel referencedModel;
if (digest == null) {
referencedModel = context.retrieveModel(refData.getReferencedModelUri());
} else {
referencedModel = context.retrieveModel(refData.getReferencedModelUri(), refData.getDigestAlgorithmUri(), digest);
}
reference.setReferencedModel(referencedModel);
}
expanded = true;
}
}
/**
* Adds new policy reference to the policy source model. The method is used by
* the ModelNode instances of type POLICY_REFERENCE that need to register themselves
* as policy references in the model.
*
* @param node policy reference model node to be registered as a policy reference
* in this model.
*/
void addNewPolicyReference(final ModelNode node) {
if (node.getType() != ModelNode.Type.POLICY_REFERENCE) {
throw new IllegalArgumentException(LocalizationMessages.WSP_0042_POLICY_REFERENCE_NODE_EXPECTED_INSTEAD_OF(node.getType()));
}
references.add(node);
}
/**
* Iterates through policy vocabulary and extracts set of namespaces used in
* the policy expression.
*
* @return collection of used namespaces within given policy instance
* @throws PolicyException Thrown if internal processing failed.
*/
private Collection getUsedNamespaces() throws PolicyException {
final Set namespaces = new HashSet();
namespaces.add(getNamespaceVersion().toString());
if (this.policyId != null) {
namespaces.add(PolicyConstants.WSU_NAMESPACE_URI);
}
final Queue nodesToBeProcessed = new LinkedList();
nodesToBeProcessed.add(rootNode);
ModelNode processedNode;
while ((processedNode = nodesToBeProcessed.poll()) != null) {
for (ModelNode child : processedNode.getChildren()) {
if (child.hasChildren()) {
if (!nodesToBeProcessed.offer(child)) {
throw LOGGER.logSevereException(new PolicyException(LocalizationMessages.WSP_0081_UNABLE_TO_INSERT_CHILD(nodesToBeProcessed, child)));
}
}
if (child.isDomainSpecific()) {
final AssertionData nodeData = child.getNodeData();
namespaces.add(nodeData.getName().getNamespaceURI());
if (nodeData.isPrivateAttributeSet()) {
namespaces.add(PolicyConstants.SUN_POLICY_NAMESPACE_URI);
}
for (Entry attribute : nodeData.getAttributesSet()) {
namespaces.add(attribute.getKey().getNamespaceURI());
}
}
}
}
return namespaces;
}
/**
* Method retrieves default prefix for given namespace. Method returns null if
* no default prefix is defined..
*
* @param namespace to get default prefix for.
* @return default prefix for given namespace. May return {@code null} if the
* default prefix for given namespace is not defined.
*/
private String getDefaultPrefix(final String namespace) {
return namespaceToPrefix.get(namespace);
}
}