com.darwinsys.swingui.ArrayListTableModel Maven / Gradle / Ivy
package com.darwinsys.swingui;
import java.util.List;
import javax.swing.table.AbstractTableModel;
/** JTable model for List of heterogeneous objects.
* Subclasses must set String columnNames[] and
* Class columnClasses[], which MUST be in the same order.
* Subclasses need only implement these AbstractTableModel methods:
*
* public int getColumnCount() {
* public Object getValueAt(int row, int col) {
* public void setValueAt(Object val, int row, int col) {
*
*/
public abstract class ArrayListTableModel extends AbstractTableModel {
/** List of column names, must be provided by subclass. */
protected String columnNames[];
/** List of column names, must be provided by subclass. */
protected Class columnClasses[];
/** The list of Method object */
protected List methods = null;
/** for caching. */
private int ROW_INVALID = -1;
/** for caching, shared by get/set ValueAt */
private int prevRow = ROW_INVALID;
/** for caching, shared by get/set ValueAt */
private Object current = null;
/** Constructor
* @param m the list of objects
*/
public ArrayListTableModel(List m) {
methods = m;
}
/** Allow the model to load the ArrayList all at once, as when
* loading a file.
* @param m the list of objects
*/
void setListData(List m) {
methods = m;
invalidateCache();
}
/** Get the name of a given column, from the list provided by subclass
* @param n The number of the column to get
*/
public String getColumnName(int n) {
if (columnNames == null)
throw new IllegalStateException("columnNames not set");
int max = columnNames.length;
if (n>=max)
throw new ArrayIndexOutOfBoundsException(
"columnNames has " + max + " elements; you asked for " + max);
return columnNames[n];
}
/** Get the class of a given column, from the list provided by subclass
* @param n The number of the column to get
*/
public Class getColumnClass(int n) {
if (columnClasses == null)
throw new IllegalStateException("columnClasses not set");
int max = columnClasses.length;
if (n>=max)
throw new ArrayIndexOutOfBoundsException(
"columnClasses has " + max + " elements; you asked for " + max);
return columnClasses[n];
}
/** @return the number of objects in the list. */
public int getRowCount() {
return methods.size();
}
public boolean isCellEditable(int rowIndex, int columnIndex) {
return true;
}
/**
* Cache one most-recently-used item. This is a convenience
* routine that subclasses are invited but not required to use.
* Normal use would be, in get/setValueAt():
*
* public void setValueAt(int row, ...) {
* MyDataType current = (MyDataType) getCached(row);
* ...
* }
*
* @param row The number of the column to get
* @return the cached object
*/
public Object getCached(int row) {
if (row != prevRow) {
current = methods.get(row);
prevRow = row;
}
return current;
}
/** Invalidate the cache. Called automatically by setListData();
* must be called if you otherwise change the ArrayList.
*/
public void invalidateCache() {
prevRow = ROW_INVALID;
}
}