| /******************************************************************************* |
| * 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.client.core.ep.serializer; |
| |
| 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.Edm; |
| import org.apache.olingo.odata2.api.edm.EdmCustomizableFeedMappings; |
| import org.apache.olingo.odata2.api.edm.EdmException; |
| import org.apache.olingo.odata2.api.edm.EdmFacets; |
| import org.apache.olingo.odata2.api.edm.EdmLiteralKind; |
| import org.apache.olingo.odata2.api.edm.EdmSimpleType; |
| import org.apache.olingo.odata2.api.edm.EdmSimpleTypeException; |
| import org.apache.olingo.odata2.api.ep.EntityProviderException; |
| import org.apache.olingo.odata2.client.api.ep.Entity; |
| import org.apache.olingo.odata2.client.api.ep.EntitySerializerProperties; |
| import org.apache.olingo.odata2.core.ep.EntityProviderProducerException; |
| import org.apache.olingo.odata2.core.ep.aggregator.EntityComplexPropertyInfo; |
| import org.apache.olingo.odata2.core.ep.aggregator.EntityPropertyInfo; |
| import org.apache.olingo.odata2.core.ep.util.FormatXml; |
| |
| /** |
| * Internal EntityProvider for simple and complex EDM properties which are pre-analyzed as {@link EntityPropertyInfo}. |
| * |
| */ |
| public class XmlPropertyEntitySerializer { |
| |
| private final boolean validateFacets; |
| |
| /** |
| * |
| * @param writeProperties |
| */ |
| public XmlPropertyEntitySerializer(final EntitySerializerProperties writeProperties) { |
| this(writeProperties.isValidatingFacets()); |
| } |
| |
| /** |
| * |
| * @param validateFacets |
| */ |
| public XmlPropertyEntitySerializer( final boolean validateFacets) { |
| this.validateFacets = validateFacets; |
| } |
| |
| /** |
| * Append {@link Object} <code>value</code> based on {@link EntityPropertyInfo} to {@link XMLStreamWriter} in an |
| * already existing XML structure inside the d namespace. |
| * |
| * @param writer |
| * @param name Name of the outer XML tag |
| * @param propertyInfo |
| * @param value |
| * @throws EntityProviderException |
| */ |
| public void append(final XMLStreamWriter writer, final String name, final EntityPropertyInfo propertyInfo, |
| final Object value) throws EntityProviderException { |
| try { |
| writer.writeStartElement(Edm.NAMESPACE_D_2007_08, name); |
| |
| if (propertyInfo.isComplex()) { |
| appendProperty(writer, (EntityComplexPropertyInfo) propertyInfo, value); |
| } else { |
| appendProperty(writer, propertyInfo, value); |
| } |
| |
| writer.writeEndElement(); |
| } catch (XMLStreamException e) { |
| throw new EntityProviderProducerException(EntityProviderException.COMMON, e); |
| } catch (EdmException e) { |
| throw new EntityProviderProducerException(e.getMessageReference(), e); |
| } |
| } |
| |
| /** |
| * Serializes custom properties |
| * @param writer |
| * @param name |
| * @param propertyInfo |
| * @param value |
| * @throws EntityProviderException |
| */ |
| public void appendCustomProperty(final XMLStreamWriter writer, final String name, |
| final EntityPropertyInfo propertyInfo, final Object value) throws EntityProviderException { |
| try { |
| if (!propertyInfo.isComplex()) { |
| writeStartElementWithCustomNamespace(writer, propertyInfo, name); |
| appendProperty(writer, propertyInfo, value); |
| writer.writeEndElement(); |
| } |
| } catch (XMLStreamException e) { |
| throw new EntityProviderProducerException(EntityProviderException.COMMON, e); |
| } catch (EdmException e) { |
| throw new EntityProviderProducerException(e.getMessageReference(), e); |
| } |
| } |
| |
| |
| /** |
| * |
| * @param writer |
| * @param propertyInfo |
| * @param value |
| * @throws XMLStreamException |
| * @throws EdmException |
| * @throws EntityProviderException |
| */ |
| private void appendProperty(final XMLStreamWriter writer, final EntityComplexPropertyInfo propertyInfo, |
| final Object value) throws XMLStreamException, EdmException, EntityProviderException { |
| |
| if (value == null) { |
| writer.writeAttribute(Edm.NAMESPACE_M_2007_08, FormatXml.ATOM_NULL, FormatXml.ATOM_VALUE_TRUE); |
| } else { |
| writer.writeAttribute(Edm.NAMESPACE_M_2007_08, FormatXml.ATOM_TYPE, getFqnTypeName(propertyInfo)); |
| List<EntityPropertyInfo> propertyInfos = propertyInfo.getPropertyInfos(); |
| for (EntityPropertyInfo childPropertyInfo : propertyInfos) { |
| if ( value instanceof Map && !((Map<?,?>)value).containsKey(childPropertyInfo.getName())|| |
| (value instanceof Entity && (((Entity)value).getProperty(childPropertyInfo.getName()))==null)) { |
| continue; |
| } |
| Object childValue = extractChildValue(value, childPropertyInfo.getName()); |
| append(writer, childPropertyInfo.getName(), childPropertyInfo, childValue); |
| } |
| } |
| } |
| |
| /** |
| * Returns full qualified name of a type of a given PropertyInfo. |
| * @return Full qualified name |
| */ |
| private String getFqnTypeName(final EntityComplexPropertyInfo propertyInfo) throws EdmException { |
| return propertyInfo.getType().getNamespace() + Edm.DELIMITER + propertyInfo.getType().getName(); |
| } |
| |
| /** |
| * If <code>value</code> is a {@link Map} the element with given <code>name</code> as key is returned. |
| * If <code>value</code> is NOT a {@link Map} its {@link String#valueOf(Object)} result is returned. |
| * |
| * @param value |
| * @param name |
| * @return name or result (see above) |
| */ |
| private Object extractChildValue(final Object value, final String name) { |
| if (value instanceof Map) { |
| Map<?, ?> map = (Map<?, ?>) value; |
| return map.get(name); |
| }else if (value instanceof Entity) { |
| Map<?, ?> map = ((Entity) value).getProperties(); |
| return map.get(name); |
| } |
| return String.valueOf(value); |
| } |
| |
| /** |
| * Appends a simple-property value to the XML stream. |
| * @param writer the XML stream writer |
| * @param prop property informations |
| * @param value the value of the property |
| * @throws XMLStreamException |
| * @throws EdmException |
| * @throws EntityProviderProducerException |
| */ |
| private void appendProperty(final XMLStreamWriter writer, final EntityPropertyInfo prop, final Object value) |
| throws XMLStreamException, EdmException, EntityProviderProducerException { |
| Object contentValue = value; |
| String mimeType = null; |
| if (prop.getMimeType() != null) { |
| mimeType = prop.getMimeType(); |
| } else if (prop.getMapping() != null && prop.getMapping().getMediaResourceMimeTypeKey() != null) { |
| mimeType = (String) extractChildValue(value, prop.getMapping().getMediaResourceMimeTypeKey()); |
| contentValue = extractChildValue(value, prop.getName()); |
| } |
| |
| if (mimeType != null) { |
| writer.writeAttribute(Edm.NAMESPACE_M_2007_08, FormatXml.M_MIME_TYPE, mimeType); |
| } |
| |
| final EdmSimpleType type = (EdmSimpleType) prop.getType(); |
| final EdmFacets facets = validateFacets ? prop.getFacets() : null; |
| String valueAsString = null; |
| try { |
| valueAsString = type.valueToString(contentValue, EdmLiteralKind.DEFAULT, facets); |
| } catch (EdmSimpleTypeException e) { |
| throw new EntityProviderProducerException(EdmSimpleTypeException.getMessageReference( |
| e.getMessageReference()).updateContent( |
| e.getMessageReference().getContent(), prop.getName()), e); |
| } |
| if (valueAsString == null) { |
| writer.writeAttribute(Edm.NAMESPACE_M_2007_08, FormatXml.ATOM_NULL, FormatXml.ATOM_VALUE_TRUE); |
| } else { |
| writer.writeCharacters(valueAsString); |
| } |
| } |
| |
| /** |
| * |
| * @param writer |
| * @param prop |
| * @param name |
| * @throws XMLStreamException |
| * @throws EntityProviderException |
| */ |
| private void writeStartElementWithCustomNamespace(final XMLStreamWriter writer, final EntityPropertyInfo prop, |
| final String name) throws XMLStreamException, EntityProviderException { |
| EdmCustomizableFeedMappings mapping = prop.getCustomMapping(); |
| String nsPrefix = mapping.getFcNsPrefix(); |
| String nsUri = mapping.getFcNsUri(); |
| if (nsUri == null || nsPrefix == null) { |
| throw new EntityProviderProducerException(EntityProviderException.INVALID_NAMESPACE.addContent(name)); |
| } |
| writer.writeStartElement(nsPrefix, name, nsUri); |
| writer.writeNamespace(nsPrefix, nsUri); |
| } |
| } |