| /******************************************************************************* |
| * 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.odata2.core.ep.producer; |
| |
| import java.util.Date; |
| import java.util.List; |
| import java.util.Map; |
| |
| import javax.xml.stream.XMLStreamException; |
| import javax.xml.stream.XMLStreamWriter; |
| |
| import org.apache.olingo.odata2.api.edm.EdmFacets; |
| import org.apache.olingo.odata2.api.edm.EdmLiteralKind; |
| import org.apache.olingo.odata2.api.edm.EdmSimpleTypeException; |
| import org.apache.olingo.odata2.api.edm.EdmTargetPath; |
| import org.apache.olingo.odata2.api.ep.EntityProviderException; |
| import org.apache.olingo.odata2.api.ep.EntityProviderWriteProperties; |
| import org.apache.olingo.odata2.api.ep.callback.TombstoneCallback; |
| import org.apache.olingo.odata2.core.edm.EdmDateTimeOffset; |
| import org.apache.olingo.odata2.core.ep.EntityProviderProducerException; |
| import org.apache.olingo.odata2.core.ep.aggregator.EntityInfoAggregator; |
| import org.apache.olingo.odata2.core.ep.aggregator.EntityPropertyInfo; |
| import org.apache.olingo.odata2.core.ep.util.FormatXml; |
| |
| /** |
| * |
| */ |
| public class TombstoneProducer { |
| |
| private String defaultDateString; |
| |
| /** |
| * Appends tombstones to an already started feed. |
| * If the list is empty no elements will be appended. |
| * @param writer same as in feed |
| * @param eia same as in feed |
| * @param properties same as in feed |
| * @param deletedEntries data to be appended |
| * @throws EntityProviderException |
| */ |
| public void appendTombstones(final XMLStreamWriter writer, final EntityInfoAggregator eia, |
| final EntityProviderWriteProperties properties, final List<Map<String, Object>> deletedEntries) |
| throws EntityProviderException { |
| try { |
| for (Map<String, Object> deletedEntry : deletedEntries) { |
| writer.writeStartElement(TombstoneCallback.NAMESPACE_TOMBSTONE, FormatXml.ATOM_TOMBSTONE_DELETED_ENTRY); |
| |
| appendRefAttribute(writer, eia, properties, deletedEntry); |
| appendWhenAttribute(writer, eia, deletedEntry); |
| |
| writer.writeEndElement(); |
| } |
| } catch (XMLStreamException e) { |
| throw new EntityProviderProducerException(EntityProviderException.COMMON, e); |
| } catch (EdmSimpleTypeException e) { |
| throw new EntityProviderProducerException(e.getMessageReference(), e); |
| } |
| } |
| |
| private void appendWhenAttribute(final XMLStreamWriter writer, final EntityInfoAggregator eia, |
| final Map<String, Object> deletedEntry) throws XMLStreamException, EdmSimpleTypeException { |
| Object updateDate = null; |
| EntityPropertyInfo updatedInfo = eia.getTargetPathInfo(EdmTargetPath.SYNDICATION_UPDATED); |
| if (updatedInfo != null) { |
| updateDate = deletedEntry.get(updatedInfo.getName()); |
| } |
| |
| if (updateDate == null) { |
| appendDefaultWhenAttribute(writer); |
| } else { |
| appendCustomWhenAttribute(writer, updateDate, updatedInfo); |
| } |
| } |
| |
| private void appendCustomWhenAttribute(final XMLStreamWriter writer, final Object updateDate, |
| final EntityPropertyInfo updatedInfo) throws XMLStreamException, EdmSimpleTypeException { |
| EdmFacets updateFacets = updatedInfo.getFacets(); |
| writer.writeAttribute(FormatXml.ATOM_TOMBSTONE_WHEN, EdmDateTimeOffset.getInstance().valueToString(updateDate, |
| EdmLiteralKind.DEFAULT, updateFacets)); |
| } |
| |
| private void appendRefAttribute(final XMLStreamWriter writer, final EntityInfoAggregator eia, |
| final EntityProviderWriteProperties properties, final Map<String, Object> deletedEntry) |
| throws XMLStreamException, EntityProviderException { |
| String ref = |
| properties.getServiceRoot().toASCIIString() + AtomEntryEntityProducer.createSelfLink(eia, deletedEntry, null); |
| writer.writeAttribute(FormatXml.ATOM_TOMBSTONE_REF, ref); |
| } |
| |
| private void appendDefaultWhenAttribute(final XMLStreamWriter writer) throws XMLStreamException, |
| EdmSimpleTypeException { |
| if (defaultDateString == null) { |
| Object defaultDate = new Date(); |
| defaultDateString = EdmDateTimeOffset.getInstance().valueToString(defaultDate, EdmLiteralKind.DEFAULT, null); |
| } |
| writer.writeAttribute(FormatXml.ATOM_TOMBSTONE_WHEN, defaultDateString); |
| |
| } |
| } |