org.apache.olingo.commons.core.serialization.AbstractAtomDealer.java Source code

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Here is the source code for org.apache.olingo.commons.core.serialization.AbstractAtomDealer.java

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/*
 * 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.olingo.commons.core.serialization;

import org.apache.commons.lang3.StringUtils;
import org.apache.olingo.commons.api.Constants;
import org.apache.olingo.commons.api.edm.constants.ODataServiceVersion;

import javax.xml.XMLConstants;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;

abstract class AbstractAtomDealer {

    protected static final String TYPE_TEXT = "text";

    protected final ODataServiceVersion version;

    protected final String namespaceMetadata;
    protected final String namespaceData;

    protected final QName etagQName;
    protected final QName metadataEtagQName;
    protected final QName inlineQName;
    protected final QName actionQName;
    protected final QName propertiesQName;
    protected final QName typeQName;
    protected final QName nullQName;
    protected final QName elementQName;
    protected final QName countQName;
    protected final QName uriQName;
    protected final QName nextQName;
    protected final QName annotationQName;
    protected final QName contextQName;
    protected final QName entryRefQName;
    protected final QName propertyValueQName;
    protected final QName deletedEntryQName;
    protected final QName reasonQName;
    protected final QName linkQName;
    protected final QName deletedLinkQName;
    protected final QName errorCodeQName;
    protected final QName errorMessageQName;
    protected final QName errorTargetQName;

    public AbstractAtomDealer(final ODataServiceVersion version) {
        this.version = version;

        namespaceMetadata = version.getNamespace(ODataServiceVersion.NamespaceKey.METADATA);
        namespaceData = version.getNamespace(ODataServiceVersion.NamespaceKey.DATASERVICES);

        etagQName = new QName(namespaceMetadata, Constants.ATOM_ATTR_ETAG);
        metadataEtagQName = new QName(namespaceMetadata, Constants.ATOM_ATTR_METADATAETAG);
        inlineQName = new QName(namespaceMetadata, Constants.ATOM_ELEM_INLINE);
        actionQName = new QName(namespaceMetadata, Constants.ATOM_ELEM_ACTION);
        propertiesQName = new QName(namespaceMetadata, Constants.PROPERTIES);
        typeQName = new QName(namespaceMetadata, Constants.ATTR_TYPE);
        nullQName = new QName(namespaceMetadata, Constants.ATTR_NULL);
        elementQName = new QName(version.compareTo(ODataServiceVersion.V40) < 0 ? namespaceData : namespaceMetadata,
                Constants.ELEM_ELEMENT);
        countQName = new QName(namespaceMetadata, Constants.ATOM_ELEM_COUNT);
        uriQName = new QName(namespaceData, Constants.ELEM_URI);
        nextQName = new QName(namespaceData, Constants.NEXT_LINK_REL);
        annotationQName = new QName(namespaceMetadata, Constants.ANNOTATION);
        contextQName = new QName(namespaceMetadata, Constants.CONTEXT);
        entryRefQName = new QName(namespaceMetadata, Constants.ATOM_ELEM_ENTRY_REF);
        propertyValueQName = new QName(namespaceMetadata, Constants.VALUE);

        deletedEntryQName = new QName(Constants.NS_ATOM_TOMBSTONE, Constants.ATOM_ELEM_DELETED_ENTRY);
        reasonQName = new QName(namespaceMetadata, Constants.ELEM_REASON);
        linkQName = new QName(namespaceMetadata, Constants.ATOM_ELEM_LINK);
        deletedLinkQName = new QName(namespaceMetadata, Constants.ELEM_DELETED_LINK);

        errorCodeQName = new QName(namespaceMetadata, Constants.ERROR_CODE);
        errorMessageQName = new QName(namespaceMetadata, Constants.ERROR_MESSAGE);
        errorTargetQName = new QName(namespaceMetadata, Constants.ERROR_TARGET);
    }

    protected void namespaces(final XMLStreamWriter writer) throws XMLStreamException {
        writer.writeNamespace(StringUtils.EMPTY, Constants.NS_ATOM);
        writer.writeNamespace(XMLConstants.XML_NS_PREFIX, XMLConstants.XML_NS_URI);
        writer.writeNamespace(Constants.PREFIX_METADATA,
                version.getNamespace(ODataServiceVersion.NamespaceKey.METADATA));
        writer.writeNamespace(Constants.PREFIX_DATASERVICES,
                version.getNamespace(ODataServiceVersion.NamespaceKey.DATASERVICES));
        writer.writeNamespace(Constants.PREFIX_GML, Constants.NS_GML);
        writer.writeNamespace(Constants.PREFIX_GEORSS, Constants.NS_GEORSS);
    }
}