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/*-
* ============LICENSE_START=======================================================
* ONAP - CCSDK
* ================================================================================
* Copyright (C) 2018 Huawei Technologies Co., Ltd. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.onap.ccsdk.sli.plugins.yangserializers.dfserializer;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.onap.ccsdk.sli.core.sli.SvcLogicException;
import org.onap.ccsdk.sli.plugins.yangserializers.pnserializer.DefaultPropertiesNodeWalker;
import org.onap.ccsdk.sli.plugins.yangserializers.pnserializer.PropertiesNode;
import org.onap.ccsdk.sli.plugins.yangserializers.pnserializer.PropertiesNodeWalker;
import java.io.Writer;
import java.util.List;
import java.util.Map;
import static org.onap.ccsdk.sli.plugins.yangserializers.dfserializer.DataFormat.XML;
import static org.onap.ccsdk.sli.plugins.yangserializers.dfserializer.DfSerializerUtil.XML_LIS_ERR;
import static org.onap.ccsdk.sli.plugins.yangserializers.dfserializer.DfSerializerUtil.XML_TREE_ERR;
/**
* Representation of XML serializer which encodes properties to XML and
* decodes properties from XML with the data format serializer.
*/
public class XmlSerializer extends DataFormatSerializer {
/**
* Creates an instance of XML serializer.
*
* @param serializerContext data format serializer context
*/
protected XmlSerializer(DataFormatSerializerContext serializerContext) {
super(XML, serializerContext);
}
@Override
public String encode(Map<String, String> param,
Map<String, List<Annotation>> annotations)
throws SvcLogicException {
PropertiesNode propNode = serializerContext().getPropNodeSerializer()
.encode(param);
PropertiesNodeWalker nodeWalker = new DefaultPropertiesNodeWalker<>();
PropertiesNodeXmlListener xmlListener = new PropertiesNodeXmlListener();
nodeWalker.walk(xmlListener, propNode);
Writer writer = xmlListener.getWriter();
return removeRootNode(writer.toString(), propNode.name());
}
@Override
public Map<String, String> decode(String dataFormatBody)
throws SvcLogicException {
if (!(serializerContext().listener() instanceof XmlListener)) {
throw new SvcLogicException(XML_LIS_ERR);
}
XmlListener listener = (XmlListener) serializerContext().listener();
XmlWalker walker = new DefaultXmlWalker();
Document document;
try {
document = DocumentHelper.parseText(dataFormatBody);
} catch (DocumentException e) {
throw new SvcLogicException(XML_TREE_ERR, e);
}
walker.walk(listener, document.getRootElement());
return serializerContext().getPropNodeSerializer().decode(
listener.serializerHelper().getPropertiesNode());
}
/**
* Removes root node from the XML data format message and makes the
* string to be pretty print.
*
* @param xml XML data format message
* @param rootName root node name
* @return pretty print format XML message
*/
private static String removeRootNode(String xml, String rootName) {
xml = xml.replace("\n<" + rootName + ">", "\n");
xml = xml.replace("</" + rootName + ">" + "\n", "");
xml = xml.replaceAll("\n" + " ", "\n");
xml = xml.replaceFirst("\n", "");
return xml;
}
}
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