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/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ws.extensions.policy;
//$Id: PolicyAlternative.java 3959 2007-07-20 14:44:19Z heiko.braun@jboss.com $
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import org.jboss.ws.WSException;
import org.jboss.wsf.common.DOMUtils;
import org.jboss.wsf.common.DOMWriter;
import org.w3c.dom.Element;
/**
* A policy alternative is a potentially empty collection of policy assertions. An alternative
* with zero assertions indicates no behaviors. An alternative with one or more assertions
* indicates behaviors implied by those, and only those assertions.
*
* The vocabulary of a policy alternative is the set of all assertion types within the
* alternative. The vocabulary of a policy is the set of all assertion types used in the policy.
* An assertion whose type is part of the policy's vocabulary but is not included in an
* alternative is explicitly prohibited by the alternative.
*
* Assertions within an alternative are not ordered, and thus aspects such as the order in
* which behaviors (indicated by assertions) are applied to a subject are beyond the scope
* of this specification.
*
* A policy alternative MAY contain multiple instances of an assertion type. Mechanisms for
* determining the aggregate behavior indicated by the assertion instances (and their Post-
* Schema-Validation Infoset (PSVI) content, if any) are specific to the assertion type.
*
* @author Thomas.Diesler@jboss.org
* @since 13-Nov-2005
*/
public class PolicyAlternative
{
private Collection<PolicyAssertion> assertions = new ArrayList<PolicyAssertion>();
// Hide constructor
PolicyAlternative()
{
}
static PolicyAlternative parse(Element elAll)
{
// Work with a cloned copy, so parsing does not effect in input node
elAll = (Element)elAll.cloneNode(true);
PolicyAlternative all = new PolicyAlternative();
Iterator it = DOMUtils.getChildElements(elAll);
while (it.hasNext())
{
Element el = (Element)it.next();
all.addPolicyAssertion(new PolicyAssertion(el));
}
return all;
}
public void addPolicyAssertion(PolicyAssertion polAssertion)
{
assertions.add(polAssertion);
}
public Collection<PolicyAssertion> getPolicyAssertions()
{
return new ArrayList<PolicyAssertion>(assertions);
}
public Element toElement()
{
String xmlString = toXMLString(false);
try
{
return DOMUtils.parse(xmlString);
}
catch (IOException ex)
{
throw new WSException("Cannot parse: " + xmlString, ex);
}
}
public String toXMLString(boolean pretty)
{
if (pretty)
{
Element elAll = toElement();
return DOMWriter.printNode(elAll, true);
}
StringBuilder xmlBuffer = new StringBuilder("<wsp:All>");
for (PolicyAssertion assertion : assertions)
{
xmlBuffer.append(assertion.toXMLString(false));
}
xmlBuffer.append("</wsp:All>");
return xmlBuffer.toString();
}
public String toString()
{
return toXMLString(true);
}
}
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