/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.neethi;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.impl.builder.StAXOMBuilder;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSession;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
/**
* PolicyReference is a wrapper that holds explict PolicyReferences.
*/
public class PolicyReference implements PolicyComponent {
private String uri;
/**
* Sets the Policy URI
* @param uri the Policy URI
*/
public void setURI(String uri) {
this.uri = uri;
}
/**
* Gets the Policy URI that is refered by self.
* @return a String that is the Policy URI refered by self
*/
public String getURI() {
return uri;
}
public boolean equal(PolicyComponent policyComponent) {
if (Constants.TYPE_POLICY_REF != policyComponent.getType()) {
return false;
}
String URI = ((PolicyReference) policyComponent).getURI();
if (URI != null && URI.length() != 0) {
return URI.equals(this.uri);
}
return false;
}
/**
* Returns short value of Constants.TYPE_POLICY_REF
*/
public short getType() {
return Constants.TYPE_POLICY_REF;
}
/**
* Throws an UnsupportedOperationException since PolicyReference.normalize()
* can't resolve the Policy that it refers to unless a PolicyRegistry is
* provided.
*/
public PolicyComponent normalize() {
throw new UnsupportedOperationException("PolicyReference.normalize() is meaningless");
}
/**
* Returns normalized version of the Policy that is refered by self. The specified
* PolicyRegistry is used to lookup for the Policy that is refered and <tt>dee</tt>
* indicates the level of normalization fo the returning Policy.
*
* @param reg the PolicyRegistry that is used to resolved the Policy refered by self
* @param deep the falg to indicate whether returning Policy should be fully normailized
* @return the normalized version fo the Policy refered by self
*/
public PolicyComponent normalize(PolicyRegistry reg, boolean deep) {
String key = getURI();
int pos = key.indexOf("#");
if (pos == 0) {
key = key.substring(1);
}else if(pos > 0){
key = key.substring(0, pos);
}
Policy policy = reg.lookup(key);
if (policy == null) {
policy = getRemoteReferencedPolicy(key);
if(policy == null){
throw new RuntimeException(key + " can't be resolved" );
}
//reg.register(key, policy);
}
return policy.normalize(reg, deep);
}
public void serialize(XMLStreamWriter writer) throws XMLStreamException {
String wspPrefix = writer.getPrefix(Constants.URI_POLICY_NS);
if (wspPrefix == null) {
wspPrefix = Constants.ATTR_WSP;
writer.setPrefix(wspPrefix, Constants.URI_POLICY_NS);
}
writer.writeStartElement(wspPrefix, Constants.ELEM_POLICY_REF, Constants.URI_POLICY_NS);
writer.writeNamespace(Constants.ATTR_WSP, Constants.URI_POLICY_NS);
writer.writeAttribute(Constants.ATTR_URI, getURI());
writer.writeEndElement();
}
public OMElement getRemoteReferedElement(String uri){
OMElement documentElement = null;
try {
//create java.net URL pointing to remote resource
URL url = new URL(uri);
XMLStreamReader parser;
// if the policy reference is a https URI
if ("https".equals(url.getProtocol())) {
HttpsURLConnection connection;
connection = (HttpsURLConnection) url.openConnection();
// implement a new HostnameVerifier which ignores the hostname information
connection.setHostnameVerifier(new HostnameVerifier() {
public boolean verify(String s, SSLSession sslSession) {
return true;
}
});
connection.setDoInput(true);
//create stax parser with the url content
parser = XMLInputFactory.newInstance().createXMLStreamReader(connection.getInputStream());
} else {
URLConnection connection;
connection = url.openConnection();
connection.setDoInput(true);
//create stax parser with the url content
parser = XMLInputFactory.newInstance().createXMLStreamReader(connection.getInputStream());
}
//get the root element (in this case the envelope)
StAXOMBuilder builder = new StAXOMBuilder(parser);
documentElement = builder.getDocumentElement();
}catch(XMLStreamException se){
throw new RuntimeException("Bad policy content: " + uri);
}catch(MalformedURLException mue){
throw new RuntimeException("Malformed uri: " + uri);
}catch(IOException ioe){
throw new RuntimeException("Cannot reach remote resource: " + uri);
}
return documentElement;
}
public Policy getRemoteReferencedPolicy(String uri) {
Policy policy = null;
//extract the remote resource contents
OMElement policyElement = getRemoteReferedElement(uri);
//call the policy engine with already extracted content
policy = PolicyEngine.getPolicy(policyElement);
return policy;
}
}