/* ===========================================================
* TradeManager : An application to trade strategies for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2011-2011, by Simon Allen and Contributors.
*
* Project Info: org.trade
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Oracle, Inc.
* in the United States and other countries.]
*
* (C) Copyright 2011-2011, by Simon Allen and Contributors.
*
* Original Author: Simon Allen;
* Contributor(s): -;
*
* Changes
* -------
*
*/
package org.trade.core.lookup;
import java.util.Vector;
/**
* Implementation of the Lookup interface that uses data from the
* ConfigProperties object for providing its Lookup information.
*
* @author Simon Allen
*/
public class PropertiesLookup implements Lookup, Cloneable, java.io.Serializable {
/**
*
*/
private static final long serialVersionUID = 5263608853348477640L;
//
// Private Attributes
//
private Vector<?> m_data = null;
private Vector<?> m_columnNames = null;
private int m_currentRowPos = -1;
/**
* Constructor
*
*
*
* @param columnNames
* Vector<?>
* @param data
* Vector<?>
*/
public PropertiesLookup(Vector<?> columnNames, Vector<?> data) {
m_columnNames = columnNames;
m_data = data;
// A precaustion to make sure that calls to my API won't throw
// nulls
if (null == m_columnNames) {
m_columnNames = new Vector<Object>();
}
if (null == m_data) {
m_data = new Vector<Object>();
}
}
/**
* Method getColumnCount.
*
* @return int
* @throws LookupException
* @see org.trade.core.lookup.Lookup#getColumnCount()
*/
public int getColumnCount() throws LookupException {
return (m_columnNames.size());
}
/**
* Method getRowCount.
*
* @return int
* @throws LookupException
* @see org.trade.core.lookup.Lookup#getRowCount()
*/
public int getRowCount() throws LookupException {
return (m_data.size());
}
/**
* Method getValueAt.
*
* @param col
* int
* @return Object
* @throws LookupException
* @see org.trade.core.lookup.Lookup#getValueAt(int)
*/
public Object getValueAt(int col) throws LookupException {
return (doGetValue(m_currentRowPos, col));
}
/**
* Method getValueAt.
*
* @param colName
* String
* @return Object
* @throws LookupException
* @see org.trade.core.lookup.Lookup#getValueAt(String)
*/
public Object getValueAt(String colName) throws LookupException {
return (doGetValue(m_currentRowPos, doGetColPos(colName)));
}
/**
* Method getValueAt.
*
* @param row
* int
* @param col
* int
* @return Object
* @throws LookupException
* @see org.trade.core.lookup.Lookup#getValueAt(int, int)
*/
public Object getValueAt(int row, int col) throws LookupException {
return (doGetValue(row, col));
}
/**
* Method getColumnName.
*
* @param colPos
* int
* @return String
* @throws LookupException
* @see org.trade.core.lookup.Lookup#getColumnName(int)
*/
public String getColumnName(int colPos) throws LookupException {
String colName = null;
try {
colName = "" + m_columnNames.elementAt(colPos);
} catch (Throwable t) {
throw new LookupException(t, "Not a valid column position");
}
return (colName);
}
/**
* Method setDefaultPos.
*
* @param colName
* String
* @return boolean
* @throws LookupException
* @see org.trade.core.lookup.Lookup#setDefaultPos(String)
*/
public boolean setDefaultPos(String colName) throws LookupException {
return (doSetPos(doGetValue(0, doGetColPos(colName)), doGetColPos(colName)));
}
/**
* Method setPos.
*
* @param colValue
* Object
* @param colName
* String
* @return boolean
* @throws LookupException
* @see org.trade.core.lookup.Lookup#setPos(Object, String)
*/
public boolean setPos(Object colValue, String colName) throws LookupException {
return (doSetPos(colValue, doGetColPos(colName)));
}
/**
* Method setPos.
*
* @param colValue
* Object
* @param col
* int
* @return boolean
* @throws LookupException
* @see org.trade.core.lookup.Lookup#setPos(Object, int)
*/
public boolean setPos(Object colValue, int col) throws LookupException {
return (doSetPos(colValue, col));
}
/**
* Method clone.
*
* @return Object
* @see org.trade.core.lookup.Lookup#clone()
*/
public Object clone() {
return (new PropertiesLookup(m_columnNames, m_data));
}
//
// Private Methods
//
/**
* Method doGetColPos.
*
* @param colName
* String
* @return int
* @throws LookupException
*/
private int doGetColPos(String colName) throws LookupException {
int pos = -1;
int columnNamesSize = m_columnNames.size();
for (int i = 0; i < columnNamesSize; i++) {
if (m_columnNames.elementAt(i).equals(colName)) {
// Have found the position
pos = i;
break;
}
}
if (-1 == pos) {
throw new LookupException("Invalid Column Name");
}
return (pos);
}
/**
* Method doGetValue.
*
* @param rowPos
* int
* @param colPos
* int
* @return Object
* @throws LookupException
*/
private Object doGetValue(int rowPos, int colPos) throws LookupException {
Object rVal = null;
if (rowPos != -1) // i.e a setPos was not performed.
{
try {
Vector<?> row = (Vector<?>) m_data.elementAt(rowPos);
rVal = row.elementAt(colPos);
} catch (Throwable t) {
throw new LookupException(t, "Out of bounds");
}
}
return (rVal);
}
/**
* Method doSetPos.
*
* @param colValue
* Object
* @param col
* int
* @return boolean
*/
private boolean doSetPos(Object colValue, int col) {
boolean rVal = false;
m_currentRowPos = -1;
int dataSize = m_data.size();
for (int i = 0; i < dataSize; i++) {
Vector<?> row = (Vector<?>) m_data.elementAt(i);
if (row.elementAt(col).equals(colValue)) {
m_currentRowPos = i;
rVal = true;
break;
}
}
return (rVal);
}
}