/*
* Copyright 2004-2009 the original author or authors.
*
* Licensed 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.compass.core.converter.mapping.osem;
import java.lang.reflect.Array;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import org.compass.core.Property;
import org.compass.core.Resource;
import org.compass.core.converter.ConversionException;
import org.compass.core.converter.Converter;
import org.compass.core.converter.mapping.ResourcePropertyConverter;
import org.compass.core.mapping.Mapping;
import org.compass.core.mapping.ResourcePropertyMapping;
import org.compass.core.mapping.osem.ClassDynamicPropertyMapping;
import org.compass.core.marshall.MarshallingContext;
/**
* @author kimchy
*/
public class ClassDynamicPropertyMappingConverter implements Converter {
public boolean marshall(Resource resource, Object root, Mapping mapping, MarshallingContext context) throws ConversionException {
ClassDynamicPropertyMapping dynamicPropertyMapping = (ClassDynamicPropertyMapping) mapping;
if (root == null) {
return false;
}
if (dynamicPropertyMapping.getObjectType() == ClassDynamicPropertyMapping.ObjectType.MAP) {
return marshallMap(resource, root, context, dynamicPropertyMapping);
} else {
return marshallSimple(resource, root, context, dynamicPropertyMapping);
}
}
public Object unmarshall(Resource resource, Mapping mapping, MarshallingContext context) throws ConversionException {
// does not support unmarshalling, simply return null
return null;
}
private boolean marshallMap(Resource resource, Object root, MarshallingContext context, ClassDynamicPropertyMapping dynamicPropertyMapping) {
Map map = (Map) root;
if (map.isEmpty()) {
return false;
}
for (Iterator it = map.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
Object nameObj = entry.getKey();
if (dynamicPropertyMapping.getNameGetter() != null) {
nameObj = dynamicPropertyMapping.getNameGetter().get(nameObj);
}
if (nameObj == null) {
continue;
}
ResourcePropertyConverter nameConverter = dynamicPropertyMapping.getNameConverter();
if (nameConverter == null) {
nameConverter = (ResourcePropertyConverter) context.getConverterLookup().lookupConverter(nameObj.getClass());
}
String name = nameConverter.toString(nameObj, null);
if (dynamicPropertyMapping.getNamePrefix() != null) {
name = dynamicPropertyMapping.getNamePrefix() + name;
}
Object valueObj = entry.getValue();
if (dynamicPropertyMapping.getMapValueType() == ClassDynamicPropertyMapping.ValueType.PLAIN) {
if (dynamicPropertyMapping.getValueGetter() != null) {
valueObj = dynamicPropertyMapping.getValueGetter().get(valueObj);
}
// don't save a null value if the context does not states so
if (valueObj == null && !handleNulls(dynamicPropertyMapping.getResourcePropertyMapping(), context)) {
continue;
}
processNameAndValue(resource, context, dynamicPropertyMapping, name, valueObj);
} else if (dynamicPropertyMapping.getMapValueType() == ClassDynamicPropertyMapping.ValueType.ARRAY) {
int size = Array.getLength(valueObj);
for (int i = 0; i < size; i++) {
Object valueItem = Array.get(valueObj, i);
if (dynamicPropertyMapping.getValueGetter() != null) {
valueItem = dynamicPropertyMapping.getValueGetter().get(valueItem);
}
if (valueItem == null && !handleNulls(dynamicPropertyMapping.getResourcePropertyMapping(), context)) {
continue;
}
processNameAndValue(resource, context, dynamicPropertyMapping, name, valueItem);
}
} else if (dynamicPropertyMapping.getMapValueType() == ClassDynamicPropertyMapping.ValueType.COLLECTION) {
Collection valueCol = (Collection) valueObj;
for (Iterator it2 = valueCol.iterator(); it2.hasNext();) {
Object valueItem = it2.next();
if (dynamicPropertyMapping.getValueGetter() != null) {
valueItem = dynamicPropertyMapping.getValueGetter().get(valueItem);
}
if (valueItem == null && !handleNulls(dynamicPropertyMapping.getResourcePropertyMapping(), context)) {
continue;
}
processNameAndValue(resource, context, dynamicPropertyMapping, name, valueItem);
}
}
}
return dynamicPropertyMapping.getResourcePropertyMapping().getStore() != Property.Store.NO;
}
private boolean marshallSimple(Resource resource, Object root, MarshallingContext context, ClassDynamicPropertyMapping dynamicPropertyMapping) {
Object nameObj = dynamicPropertyMapping.getNameGetter().get(root);
if (nameObj == null) {
return false;
}
String name = dynamicPropertyMapping.getNameConverter().toString(nameObj, null);
if (dynamicPropertyMapping.getNamePrefix() != null) {
name = dynamicPropertyMapping.getNamePrefix() + name;
}
Object valueObj = dynamicPropertyMapping.getValueGetter().get(root);
// don't save a null value if the context does not states so
if (valueObj == null && !handleNulls(dynamicPropertyMapping.getResourcePropertyMapping(), context)) {
return false;
}
processNameAndValue(resource, context, dynamicPropertyMapping, name, valueObj);
return dynamicPropertyMapping.getResourcePropertyMapping().getStore() != Property.Store.NO;
}
private void processNameAndValue(Resource resource, MarshallingContext context, ClassDynamicPropertyMapping dynamicPropertyMapping, String name, Object valueObj) {
if (dynamicPropertyMapping.getValueType() == ClassDynamicPropertyMapping.ValueType.ARRAY) {
int size = Array.getLength(valueObj);
for (int i = 0; i < size; i++) {
Object valueItem = Array.get(valueObj, i);
if (valueItem == null && !handleNulls(dynamicPropertyMapping.getResourcePropertyMapping(), context)) {
continue;
}
addProperty(resource, dynamicPropertyMapping, context, name, valueItem);
}
} else if (dynamicPropertyMapping.getValueType() == ClassDynamicPropertyMapping.ValueType.COLLECTION) {
Collection valueCol = (Collection) valueObj;
for (Iterator it = valueCol.iterator(); it.hasNext();) {
Object valueItem = it.next();
if (valueItem == null && !handleNulls(dynamicPropertyMapping.getResourcePropertyMapping(), context)) {
continue;
}
addProperty(resource, dynamicPropertyMapping, context, name, valueItem);
}
} else {
ResourcePropertyConverter valueConverter = dynamicPropertyMapping.getValueConverter();
if (valueConverter == null) {
valueConverter = (ResourcePropertyConverter) context.getConverterLookup().lookupConverter(valueObj.getClass());
}
String value = valueConverter.toString(valueObj, dynamicPropertyMapping.getResourcePropertyMapping());
Property property = context.getResourceFactory().createProperty(name, value, dynamicPropertyMapping.getResourcePropertyMapping());
resource.addProperty(property);
}
}
protected void addProperty(Resource resource, ClassDynamicPropertyMapping mapping, MarshallingContext context, String name, Object valueObj) {
String value = mapping.getValueConverter().toString(valueObj, mapping.getResourcePropertyMapping());
Property property = context.getResourceFactory().createProperty(name, value, mapping.getResourcePropertyMapping());
resource.addProperty(property);
}
/**
* <p>Should the converter handle nulls? Handling nulls means should the
* converter process nulls or not. Usually the converter will not
* persist null values, but sometimes it might be needed
* ({@link org.compass.core.marshall.MarshallingContext#handleNulls()}).
*
* <p>If a specific null value is configured with the {@link org.compass.core.mapping.ResourcePropertyMapping}
* then the converter will always handle nulls and write it.
*
* @param context The marshalling context
* @return <code>true</code> if the converter should handle null values
*/
protected boolean handleNulls(ResourcePropertyMapping resourcePropertyMapping, MarshallingContext context) {
return resourcePropertyMapping.hasNullValue() || context.handleNulls();
}
/**
* If the converter handle nulls, the value that will be stored in the
* search engine for <code>null</code> values (during the marshall process). Uses
* {@link org.compass.core.mapping.ResourcePropertyMapping#getNullValue()}.
*
* @param resourcePropertyMapping The resource proeprty mapping to get the null value from
* @param context The marshalling context
* @return Null value that will be inserted for <code>null</code>s.
*/
protected String getNullValue(ResourcePropertyMapping resourcePropertyMapping, MarshallingContext context) {
return resourcePropertyMapping.getNullValue();
}
}