keycellformatter.java

来自「一个java工作流引擎」· Java 代码 · 共 25 行

package org.jbpm.web.tag.formatter;

import java.util.*;
import javax.servlet.jsp.*;

import org.jbpm.web.tag.*;

public class KeyCellFormatter implements CellFormatter {

  private KeyCellFormatter() {}
  private static final KeyCellFormatter instance = new KeyCellFormatter();
  public static KeyCellFormatter getInstance() { return instance; }

	public Object writeCell(Object rowObject, Column column, PageContext pageContext) throws JspException {
    Object cellObject = null;
    try {
      cellObject = ((Map)rowObject).get( column.getKey() );
    } catch ( ClassCastException e ) {
      throw new JspException( "row-objects are supposed to be java.util.Map's when using the KeyCellFormatter, not '" + rowObject.getClass().getName() + "'" );
    }
    return cellObject;
  }

}