/*
 * 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.tuscany.sca.policy.recoveryrules;

import java.io.InputStream;
import java.io.StringWriter;
import java.net.URL;
import java.util.Iterator;
import java.util.Map;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.junit.Test;
import org.apache.axiom.om.OMAttribute;
import org.apache.axiom.om.OMElement;
import org.apache.tuscany.sca.guardian.Constants;

public class PolicyReadTestCase {

    @Test
    public void testPolicyReading() throws Exception {
        RecoveryRulesPolicyProcessor processor = new RecoveryRulesPolicyProcessor(null, null);

        URL url = getClass().getResource("test_policies.xml");
        XMLInputFactory inputFactory = XMLInputFactory.newInstance();

        InputStream urlStream = url.openStream();
        XMLStreamReader reader = inputFactory.createXMLStreamReader(urlStream);


        RecoveryRulesPolicy policy = processor.read(reader);
        Map<String, OMElement> map = policy.getRuleElements();

        StringWriter sw = new StringWriter();

        XMLStreamWriter writter = XMLOutputFactory.newInstance().createXMLStreamWriter(sw);
        writter.writeStartDocument();
        writter.writeStartElement(Constants.RECOVERY_RULES);

        writeElements(map.values().iterator(), writter);

        writter.writeEndElement();
        writter.writeEndDocument();
        writter.close();

        System.out.println(sw.toString());
    }

    private void writeElements(Iterator elements, XMLStreamWriter writer) throws Exception {

        OMElement el;
        OMAttribute at;

        while (elements.hasNext()) {
            el = (OMElement) elements.next();

            //write the element's name
            writer.writeStartElement(el.getLocalName());

            //write the attributes
            Iterator attributes = el.getAllAttributes();
            while (attributes.hasNext()) {
                at = (OMAttribute) attributes.next();
                writer.writeAttribute(at.getLocalName(), at.getAttributeValue());
            }

            //write texts
            if (el.getText().length() != 0) {
                writer.writeCharacters(el.getText());
            }

            Iterator children = el.getChildElements();
            writeElements(children, writer);

            writer.writeEndElement();
        }

    }
}