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package org.apache.taglibs.standard.lang.jstl.test;

import java.util.HashMap;
import java.util.Map;

import org.apache.taglibs.standard.lang.jstl.Evaluator;

/**
 *
 * <p>This class contains some test functions.</p>
 * 
 * @author Shawn Bayern
 */

public class StaticFunctionTests {

  public static void main(String args[]) throws Exception {
    Map m = getSampleMethodMap();
    Evaluator e = new Evaluator();
    Object o;
    o = e.evaluate("", "4", Integer.class, null, null, m, "foo");
    System.out.println(o);
    o = e.evaluate("", "${4}", Integer.class, null, null, m, "foo");
    System.out.println(o);
    o = e.evaluate("", "${2+2}", Integer.class, null, null, m, "foo");
    System.out.println(o);
    o = e.evaluate("", "${foo:add(2, 3)}", Integer.class, null, null, m, "foo");
    System.out.println(o);
    o = e.evaluate("", "${foo:multiply(2, 3)}", Integer.class, null, null, m, "foo");
    System.out.println(o);
    o = e.evaluate("", "${add(2, 3)}", Integer.class, null, null, m, "foo");
    System.out.println(o);
    o = e.evaluate("", "${multiply(2, 3)}", Integer.class, null, null, m, "foo");
    System.out.println(o);
    o = e.evaluate("", "${add(2, 3) + 5}", Integer.class, null, null, m, "foo");
    System.out.println(o);

    System.out.println("---");
    o = e.evaluate("", "${getInt(getInteger(getInt(5)))}", Integer.class, null, null, m, "foo");
    System.out.println(o);
    o = e.evaluate("", "${getInteger(getInt(getInteger(5)))}", Integer.class, null, null, m, "foo");
    System.out.println(o);
    o = e.evaluate("", "${getInt(getInt(getInt(5)))}", Integer.class, null, null, m, "foo");
    System.out.println(o);
    o = e.evaluate("", "${getInteger(getInteger(getInteger(5)))}", Integer.class, null, null, m, "foo");
    System.out.println(o);

  }

  public static int add(int a, int b) {
    return a + b;
  }

  public static int multiply(int a, int b) {
    return a * b;
  }

  public static int getInt(Integer i) {
    return i.intValue();
  }

  public static Integer getInteger(int i) {
    return Integer.valueOf(i);
  }

  public static Map getSampleMethodMap() throws Exception {
    Map m = new HashMap();
    Class c = StaticFunctionTests.class;
    m.put("foo:add",
     c.getMethod("add", new Class[] { Integer.TYPE, Integer.TYPE }));
    m.put("foo:multiply",
     c.getMethod("multiply", new Class[] { Integer.TYPE, Integer.TYPE }));
    m.put("foo:getInt",
     c.getMethod("getInt", new Class[] { Integer.class }));
    m.put("foo:getInteger",
     c.getMethod("getInteger", new Class[] { Integer.TYPE }));
    return m;
  }

}