org.opendaylight.controller.xml.codec.XmlDocumentUtils.java Source code

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Here is the source code for org.opendaylight.controller.xml.codec.XmlDocumentUtils.java

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/*
 * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.controller.xml.codec;

import com.google.common.base.Optional;
import java.net.URI;
import java.util.Collection;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.data.impl.codec.xml.XmlCodecProvider;
import org.opendaylight.yangtools.yang.model.api.ChoiceCaseNode;
import org.opendaylight.yangtools.yang.model.api.ChoiceSchemaNode;
import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class XmlDocumentUtils {
    public static final QName OPERATION_ATTRIBUTE_QNAME = QName
            .create(URI.create("urn:ietf:params:xml:ns:netconf:base:1.0"), null, "operation");

    public static Document getDocument() {
        final DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        Document doc = null;
        try {
            final DocumentBuilder bob = dbf.newDocumentBuilder();
            doc = bob.newDocument();
        } catch (final ParserConfigurationException e) {
            throw new RuntimeException(e);
        }
        return doc;
    }

    public static QName qNameFromElement(final Element xmlElement) {
        final String namespace = xmlElement.getNamespaceURI();
        final String localName = xmlElement.getLocalName();
        return QName.create(namespace != null ? URI.create(namespace) : null, null, localName);
    }

    public static final Optional<DataSchemaNode> findFirstSchema(final QName qname,
            final Collection<DataSchemaNode> dataSchemaNode) {
        if (dataSchemaNode != null && !dataSchemaNode.isEmpty() && qname != null) {
            for (final DataSchemaNode dsn : dataSchemaNode) {
                if (qname.isEqualWithoutRevision(dsn.getQName())) {
                    return Optional.<DataSchemaNode>of(dsn);
                } else if (dsn instanceof ChoiceSchemaNode) {
                    for (final ChoiceCaseNode choiceCase : ((ChoiceSchemaNode) dsn).getCases()) {
                        final Optional<DataSchemaNode> foundDsn = findFirstSchema(qname,
                                choiceCase.getChildNodes());
                        if (foundDsn != null && foundDsn.isPresent()) {
                            return foundDsn;
                        }
                    }
                }
            }
        }
        return Optional.absent();
    }

    public static final XmlCodecProvider defaultValueCodecProvider() {
        return XmlUtils.DEFAULT_XML_CODEC_PROVIDER;
    }
}