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packagecom.hof.mi.interfaces;
  
/**
* Base class for Custom Formatters
*/
  
public abstract class CustomFormatter extends UserInputParameters {
  
    private static final String cvsId = "$Id: CustomFormatter.java,v 1.1 2008-02-29 04:07:06 steve Exp $";
    public static final int RENDER_HTML       = 1;
    public static final int RENDER_TEXT       = 2;
    public static final int RENDER_CSV        = 3;
    public static final int RENDER_LINK       = 4;
  
    /**
    * Returns the display name for this custom formatter
    * @return name
    */
    public abstract String getName();
  
    /**
    * Returns true if this custom formatter accepts the given native type.
    * @param type the data type to check
    * @return true/false
    */
    public abstract boolean acceptsNativeType(int type);
  
    /**
    * Returns whether or not the value returned from this formatter
    * includes html code. If this returns false, a String value
    * will have any html entities parsed before output.
    * @return true/false
    */
    public boolean returnsHtml() {
        return false;
    }
  
    /**
    * Method to render a value using this custom defined data type format.
    * This is called internally when the report is rendered. The current render type is passed in so
    * that rendering can be modifed for each type (ie. CSVs cannot contain image data)
    * @param value - Object to be formatted
    * @paramrenderType - How the report is being rendered.
    * @return String - The value rendered to a String
    * @throws Exception - Throw an exception, Yellowfin will do an Object.toString() call if an exception is encountered
    */
    public abstract String render(Object value, int renderType) throws Exception;
}

package com.example.formatters;
import com.hof.mi.interfaces.CustomFormatter;
import java.text.*;
 
 
public class CurrencyFormatter extends CustomFormatter {
    public String getName() {
            return "Currency Formatter";
    }
    public boolean acceptsNativeType(int type) {
            // We only handle numeric types
            if (type == TYPE_NUMERIC) return true;
            return false;
    }
    public String render(Object value, int renderType) throws Exception {
            if (value == null) return null;
            if (renderType == RENDER_LINK) {
                  // Return a generic version of the value
                  return value.toString();
    }
 
 
    // Create a String representing the value as a currency value
    NumberFormat nf = new DecimalFormat("0.00");
    return "$" + nf.format((Number)value); }
}