| /******************************************************************************* |
| * 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.consumer; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import javax.xml.stream.XMLStreamConstants; |
| import javax.xml.stream.XMLStreamException; |
| import javax.xml.stream.XMLStreamReader; |
| |
| import org.apache.olingo.odata2.api.edm.Edm; |
| 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.EdmProperty; |
| 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.api.ep.EntityProviderReadProperties; |
| import org.apache.olingo.odata2.core.ep.aggregator.EntityComplexPropertyInfo; |
| 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.aggregator.EntityTypeMapping; |
| import org.apache.olingo.odata2.core.ep.util.FormatXml; |
| |
| /** |
| * XML property consumer. |
| */ |
| public class XmlPropertyConsumer { |
| |
| protected static final String TRUE = "true"; |
| protected static final String FALSE = "false"; |
| |
| public Map<String, Object> readProperty(final XMLStreamReader reader, final EdmProperty property, |
| final EntityProviderReadProperties readProperties) throws EntityProviderException { |
| return readProperty(reader, EntityInfoAggregator.create(property), readProperties); |
| } |
| |
| public Map<String, Object> readProperty(final XMLStreamReader reader, final EntityPropertyInfo propertyInfo, |
| final EntityProviderReadProperties readProperties) throws EntityProviderException { |
| final EntityTypeMapping typeMappings = |
| EntityTypeMapping.create(readProperties == null ? Collections.<String, Object> emptyMap() : |
| readProperties.getTypeMappings()); |
| final boolean merge = readProperties != null && readProperties.getMergeSemantic(); |
| try { |
| reader.next(); |
| |
| Object value = readStartedElement(reader, propertyInfo.getName(), propertyInfo, typeMappings, readProperties); |
| |
| if (propertyInfo.isComplex() && merge) { |
| mergeWithDefaultValues(value, propertyInfo); |
| } |
| |
| Map<String, Object> result = new HashMap<String, Object>(); |
| result.put(propertyInfo.getName(), value); |
| return result; |
| } catch (XMLStreamException e) { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| } catch (EdmException e) { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| private void mergeWithDefaultValues(final Object value, final EntityPropertyInfo epi) throws EntityProviderException { |
| if (!(value instanceof Map)) { |
| throw new EntityProviderException(EntityProviderException.COMMON); |
| } |
| if (!epi.isComplex()) { |
| throw new EntityProviderException(EntityProviderException.COMMON); |
| } |
| |
| mergeComplexWithDefaultValues((Map<String, Object>) value, (EntityComplexPropertyInfo) epi); |
| } |
| |
| private void mergeComplexWithDefaultValues(final Map<String, Object> complexValue, |
| final EntityComplexPropertyInfo ecpi) { |
| for (EntityPropertyInfo info : ecpi.getPropertyInfos()) { |
| Object obj = complexValue.get(info.getName()); |
| if (obj == null) { |
| if (info.isComplex()) { |
| Map<String, Object> defaultValue = new HashMap<String, Object>(); |
| mergeComplexWithDefaultValues(defaultValue, ecpi); |
| complexValue.put(info.getName(), defaultValue); |
| } else { |
| EdmFacets facets = info.getFacets(); |
| if (facets != null) { |
| complexValue.put(info.getName(), facets.getDefaultValue()); |
| } |
| } |
| } |
| } |
| } |
| |
| public List<?> readCollection(XMLStreamReader reader, final EntityPropertyInfo info, |
| final EntityProviderReadProperties properties) throws EntityProviderException { |
| final String collectionName = info.getName(); |
| final EntityTypeMapping typeMappings = EntityTypeMapping.create( |
| properties == null || !properties.getTypeMappings().containsKey(collectionName) ? |
| Collections.<String, Object> emptyMap() : |
| Collections.<String, Object> singletonMap(FormatXml.D_ELEMENT, |
| properties.getTypeMappings().get(collectionName))); |
| List<Object> result = new ArrayList<Object>(); |
| try { |
| reader.nextTag(); |
| reader.require(XMLStreamConstants.START_ELEMENT, Edm.NAMESPACE_D_2007_08, collectionName); |
| reader.nextTag(); |
| while (reader.isStartElement()) { |
| result.add(readStartedElement(reader, FormatXml.D_ELEMENT, info, typeMappings, properties)); |
| reader.nextTag(); |
| } |
| reader.require(XMLStreamConstants.END_ELEMENT, Edm.NAMESPACE_D_2007_08, collectionName); |
| reader.next(); |
| reader.require(XMLStreamConstants.END_DOCUMENT, null, null); |
| return result; |
| } catch (final XMLStreamException e) { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED |
| .addContent(e.getClass().getSimpleName()), e); |
| } catch (final EdmException e) { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED |
| .addContent(e.getClass().getSimpleName()), e); |
| } |
| } |
| |
| protected Object readStartedElement(XMLStreamReader reader, final String name, final EntityPropertyInfo propertyInfo, |
| final EntityTypeMapping typeMappings, final EntityProviderReadProperties readProperties) |
| throws EntityProviderException, EdmException { |
| Object result = null; |
| |
| try { |
| reader.require(XMLStreamConstants.START_ELEMENT, Edm.NAMESPACE_D_2007_08, name); |
| final String nullAttribute = reader.getAttributeValue(Edm.NAMESPACE_M_2007_08, FormatXml.M_NULL); |
| |
| if (!(nullAttribute == null || TRUE.equals(nullAttribute) || FALSE.equals(nullAttribute))) { |
| throw new EntityProviderException(EntityProviderException.COMMON); |
| } |
| |
| if (TRUE.equals(nullAttribute)) { |
| if ((readProperties == null || readProperties.isValidatingFacets()) && propertyInfo.isMandatory()) { |
| throw new EdmSimpleTypeException(EdmSimpleTypeException.VALUE_NULL_NOT_ALLOWED.addContent(name)); |
| } |
| reader.nextTag(); |
| } else if (propertyInfo.isComplex()) { |
| final String typeAttribute = reader.getAttributeValue(Edm.NAMESPACE_M_2007_08, FormatXml.M_TYPE); |
| if (typeAttribute != null) { |
| final String expectedTypeAttributeValue = |
| propertyInfo.getType().getNamespace() + Edm.DELIMITER + propertyInfo.getType().getName(); |
| if (!expectedTypeAttributeValue.equals(typeAttribute)) { |
| throw new EntityProviderException(EntityProviderException.INVALID_COMPLEX_TYPE.addContent( |
| expectedTypeAttributeValue).addContent(typeAttribute)); |
| } |
| } |
| |
| reader.nextTag(); |
| Map<String, Object> name2Value = new HashMap<String, Object>(); |
| while (reader.hasNext() && !reader.isEndElement()) { |
| final String childName = reader.getLocalName(); |
| final EntityPropertyInfo childProperty = |
| ((EntityComplexPropertyInfo) propertyInfo).getPropertyInfo(childName); |
| if (childProperty == null) { |
| throw new EntityProviderException(EntityProviderException.INVALID_PROPERTY.addContent(childName)); |
| } |
| final Object value = readStartedElement(reader, childName, childProperty, |
| typeMappings.getEntityTypeMapping(name), readProperties); |
| name2Value.put(childName, value); |
| reader.nextTag(); |
| } |
| result = name2Value; |
| } else { |
| result = convert(propertyInfo, reader.getElementText(), typeMappings.getMappingClass(name), readProperties); |
| } |
| reader.require(XMLStreamConstants.END_ELEMENT, Edm.NAMESPACE_D_2007_08, name); |
| |
| return result; |
| } catch (XMLStreamException e) { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| } |
| } |
| |
| private Object convert(final EntityPropertyInfo property, final String value, final Class<?> typeMapping, |
| final EntityProviderReadProperties readProperties) throws EdmSimpleTypeException { |
| final EdmSimpleType type = (EdmSimpleType) property.getType(); |
| final Class<?> typeMappingClass = typeMapping == null ? type.getDefaultType() : (Class<?>) typeMapping; |
| final EdmFacets facets = readProperties == null || readProperties.isValidatingFacets() ? |
| property.getFacets() : null; |
| return type.valueOfString(value, EdmLiteralKind.DEFAULT, |
| facets, typeMappingClass); |
| } |
| } |