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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.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
/**
*
* A ResultSetRow is used to transform a single row of a ResultSet into a set of EDataObjects.
*/
public class ResultSetRow {
private final Logger logger = Logger.getLogger(ResultSetRow.class);
private final ResultMetadata metadata;
private Map tableMap = new HashMap();
private List allTableData;
/**
* 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 {
if (this.logger.isDebugEnabled()) {
this.logger.debug("");
}
for (int i = 1; i <= metadata.getResultSetSize(); i++) {
Object data = getObject(rs, i);
TableData table = getRawData(metadata.getTablePropertyName(i));
if (this.logger.isDebugEnabled()) {
this.logger.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;
if (this.logger.isDebugEnabled()) {
this.logger.debug("");
}
while (i <= metadata.getResultSetSize()) {
if (this.logger.isDebugEnabled()) {
this.logger.debug("");
}
TableData table = new TableData(metadata.getTablePropertyName(i));
this.allTableData.add(table);
while ((i <= metadata.getResultSetSize()) && (metadata.isPKColumn(i))) {
Object data = getObject(rs, i);
if (this.logger.isDebugEnabled()) {
this.logger.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);
if (this.logger.isDebugEnabled()) {
this.logger.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;
}
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 List getAllTableData() {
if (this.allTableData == null) {
this.allTableData = new ArrayList();
this.allTableData.addAll(tableMap.values());
}
if (this.logger.isDebugEnabled()) {
this.logger.debug(allTableData);
}
return this.allTableData;
}
}
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