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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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.apache.tuscany.das.rdb.graphbuilder.impl;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import org.apache.tuscany.das.rdb.util.DebugUtil;
/**
*
* A ResultSetRow is used to transform a single row of a ResultSet into a set of
* EDataObjects.
*/
public class ResultSetRow {
private final ResultMetadata metadata;
private HashMap tableMap = new HashMap();
private ArrayList allTableData;
private boolean debug = false;
/**
* Method ResultSetRow.
*
* @param rs
* A ResultSet positioned on the desired row
* @param ePackage
* The package used to create EDataObjects
*/
public ResultSetRow(ResultSet rs, ResultMetadata m) throws SQLException {
this.metadata = m;
if (m.isRecursive())
processRecursiveRow(rs);
else
processRow(rs);
}
/**
* Processes a single row in the ResultSet Method processRow.
*
* @param rs
*/
private void processRow(ResultSet rs) throws SQLException {
DebugUtil.debugln(getClass(), debug, "");
for (int i = 1; i <= metadata.getResultSetSize(); i++) {
Object data = getObject(rs, i);
TableData table = getRawData(metadata.getTablePropertyName(i));
DebugUtil.debugln(getClass(), debug, "Adding column: "
+ metadata.getColumnPropertyName(i) + "\tValue: " + data
+ "\tTable: " + metadata.getTablePropertyName(i));
table.addData(metadata.getColumnPropertyName(i), metadata
.isPKColumn(i), data);
}
}
public void processRecursiveRow(ResultSet rs) throws SQLException {
this.allTableData = new ArrayList();
int i = 1;
DebugUtil.debugln(getClass(), debug, "");
while (i <= metadata.getResultSetSize()) {
DebugUtil.debugln(getClass(), debug, "");
TableData table = new TableData(metadata.getTablePropertyName(i));
this.allTableData.add(table);
while ( (i <= metadata.getResultSetSize()) && (metadata.isPKColumn(i))) {
Object data = getObject(rs, i);
DebugUtil.debugln(getClass(), debug, "Adding column: "
+ metadata.getColumnPropertyName(i) + "\tValue: " + data
+ "\tTable: " + metadata.getTablePropertyName(i));
table.addData(metadata.getColumnPropertyName(i), true, data);
i++;
}
while ( (i <= metadata.getResultSetSize()) &&
(!metadata.isPKColumn(i))) {
Object data = getObject(rs, i);
DebugUtil.debugln(getClass(), debug, "Adding column: "
+ metadata.getColumnPropertyName(i) + "\tValue: " + data
+ "\tTable: " + metadata.getTablePropertyName(i));
table.addData(metadata.getColumnPropertyName(i), false, data);
i++;
}
}
}
/**
* @param rs
* @param metadata
* @param i
* @return
*/
private Object getObject(ResultSet rs, int i)
throws SQLException {
Object data = rs.getObject(i);
if (rs.wasNull())
return null;
else
return metadata.getConverter(i).getPropertyValue(data);
}
/**
* Returns a HashMap that holds data for the specified table
*
* @param tableName
* The name of the table
* @return HashMap
*/
public TableData getTable(String tableName) {
return (TableData) tableMap.get(tableName);
}
/**
* Returns a HashMap that holds data for the specified table If the HashMap
* doesn't exist, it will be created. This is used internally to build the
* ResultSetRow, whereas getTable is used externally to retrieve existing
* table data.
*
* @param tableName
* The name of the table
* @return HashMap
*/
private TableData getRawData(String tableName) {
TableData table = (TableData) tableMap.get(tableName);
if (table == null) {
table = new TableData(tableName);
tableMap.put(tableName, table);
}
return table;
}
public ArrayList getAllTableData() {
if ( this.allTableData == null ) {
this.allTableData = new ArrayList();
this.allTableData.addAll(tableMap.values());
}
DebugUtil.debugln(getClass(), debug, allTableData);
return this.allTableData;
}
}
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