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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.tuscany.das.rdb.graphbuilder.impl;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.apache.log4j.Logger;
import org.apache.tuscany.sdo.util.DataObjectUtil;
import commonj.sdo.DataObject;
import commonj.sdo.Property;
import commonj.sdo.Type;
import commonj.sdo.helper.DataFactory;
public final class DataObjectMaker {
private final DataObject rootObject;
private final Map containmentPropertyMap;
private final Map typeMap;
private static final Logger logger = Logger.getLogger(DataObjectMaker.class);
public DataObjectMaker(DataObject root) {
this.rootObject = root;
containmentPropertyMap = new HashMap();
typeMap = new HashMap();
Iterator i = this.rootObject.getType().getProperties().iterator();
while (i.hasNext()) {
Property p = (Property) i.next();
Type type = p.getType();
String typeName = type.getName();
typeMap.put(typeName, type);
if (p.isContainment()) {
containmentPropertyMap.put(typeName, p);
}
}
}
/**
* @param tableData
* @return
*/
public DataObject createAndAddDataObject(TableData tableData, ResultMetadata resultMetadata) {
// Get a Type from the package and create a standalone DataObject
if (this.logger.isDebugEnabled()) {
this.logger.debug("Looking for Type for " + tableData.getTableName());
}
String tableName = tableData.getTableName();
Type tableClass = (Type) typeMap.get(tableName);
if (tableClass == null) {
throw new RuntimeException("An SDO Type with name " + tableData.getTableName() + " was not found");
}
DataObject obj = DataFactory.INSTANCE.create(tableClass);
// Now, check to see if the root data object has a containment reference
// to this EClass. If so, add it to the graph. If not, it will be taken
// care of when we process relationships
Property containmentProp = (Property) containmentPropertyMap.get(tableName);
if (containmentProp != null) {
if (containmentProp.isMany()) {
rootObject.getList(containmentProp).add(obj);
} else {
this.rootObject.set(containmentProp, obj);
}
}
// Set the column values
Iterator columnNames = resultMetadata.getPropertyNames(tableData.getTableName()).iterator();
Type objType = obj.getType();
while (columnNames.hasNext()) {
String propertyName = (String) columnNames.next();
Property p = objType.getProperty(propertyName);
if (p == null) {
// Try again, ignoring case
p = findProperty(objType, propertyName);
if (p == null) {
throw new RuntimeException("Type " + obj.getType().getName()
+ " does not contain a property named " + propertyName);
}
}
Object value = tableData.getColumnData(propertyName);
try {
obj.set(p, value);
} catch (ClassCastException e) {
// a mismatch between the value and property types may happen in some cases
// e.g. when the property is a boolean but the database doesn't have a boolean data type
if (value != null) {
Object convertedValue = DataObjectUtil.getSetValue(p, value.toString());
obj.set(p, convertedValue);
}
}
}
return obj;
}
// temporary, ignoring case
private Property findProperty(Type type, String columnName) {
Iterator properties = type.getProperties().iterator();
while (properties.hasNext()) {
Property p = (Property) properties.next();
if (columnName.equalsIgnoreCase(p.getName())) {
return p;
}
}
return null;
}
}
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