Java Code Examples for org.apache.commons.jexl3.JexlEngine#createExpression()

@Test
public void testCache() {
    JexlEngine engine = new JexlBuilder().cache(100).create();

    JexlExpression expr = engine.createExpression("a = 3 ? 1 : 3");
    JexlExpression expr2 = engine.createExpression("a = 3 ? 1 : 3");
    assertSame(expr, expr2);
}
 

@Override
boolean validateRaw(ActionContext actionContext, AndroidDeviceDriver androidDeviceDriver) {
  // Create or retrieve an engine
  JexlEngine jexl = new JexlBuilder().create();

  // Create an expression
  JexlExpression e = jexl.createExpression(expression);

  JexlContext jc = new MapContext();

  // To use advanced expression, need a converter to do the trick, the expression will be like
  // "uicdTypeConverter.toInt($uicd_var1) + uicdTypeConverter.toInt($uicd_var2)";
  if (expression.contains(TYPE_CONVERTER_OBJ_KEYWORD)) {
    jc.set(TYPE_CONVERTER_OBJ_KEYWORD, new UicdTypeConverter());
  }
  // Create a context and add data
  // jc.set("$uicd_var1", new String("adbcd"));
  // Set the displayStr so that we can see the result in the test details.
  displayStr = expandUicdGlobalVariableToJexl(expression, jc, actionContext);

  // Now evaluate the expression, getting the result
  boolean ret = false;
  try {
    Object o = e.evaluate(jc);
    ret = Boolean.parseBoolean(o.toString());
  } catch (Exception ex) {
    System.out.println(ex.getMessage());
  }
  displayStr = String.format("%s|validation result:%s", displayStr, ret);
  return ret;
}
 

/**
 * An example for array access.
 */
static void example(Output out) throws Exception {
    /*
     * First step is to retrieve an instance of a JexlEngine;
     * it might be already existing and shared or created anew.
     */
    JexlEngine jexl = new JexlBuilder().create();
    /*
     *  Second make a jexlContext and put stuff in it
     */
    JexlContext jc = new MapContext();

    List<Object> l = new ArrayList<Object>();
    l.add("Hello from location 0");
    Integer two = 2;
    l.add(two);
    jc.set("array", l);

    JexlExpression e = jexl.createExpression("array[1]");
    Object o = e.evaluate(jc);
    out.print("Object @ location 1 = ", o, two);

    e = jexl.createExpression("array[0].length()");
    o = e.evaluate(jc);

    out.print("The length of the string at location 0 is : ", o, 21);
}
 

/**
 * An example for method access.
 */
public static void example(final Output out) throws Exception {
    /**
     * First step is to retrieve an instance of a JexlEngine;
     * it might be already existing and shared or created anew.
     */
    JexlEngine jexl = new JexlBuilder().create();
    /*
     *  Second make a jexlContext and put stuff in it
     */
    JexlContext jc = new MapContext();

    /**
     * The Java equivalents of foo and number for comparison and checking
     */
    Foo foo = new Foo();
    Integer number = new Integer(10);

    jc.set("foo", foo);
    jc.set("number", number);

    /*
     *  access a method w/o args
     */
    JexlExpression e = jexl.createExpression("foo.getFoo()");
    Object o = e.evaluate(jc);
    out.print("value returned by the method getFoo() is : ", o, foo.getFoo());

    /*
     *  access a method w/ args
     */
    e = jexl.createExpression("foo.convert(1)");
    o = e.evaluate(jc);
    out.print("value of " + e.getParsedText() + " is : ", o, foo.convert(1));

    e = jexl.createExpression("foo.convert(1+7)");
    o = e.evaluate(jc);
    out.print("value of " + e.getParsedText() + " is : ", o, foo.convert(1+7));

    e = jexl.createExpression("foo.convert(1+number)");
    o = e.evaluate(jc);
    out.print("value of " + e.getParsedText() + " is : ", o, foo.convert(1+number.intValue()));

    /*
     * access a property
     */
    e = jexl.createExpression("foo.bar");
    o = e.evaluate(jc);
    out.print("value returned for the property 'bar' is : ", o, foo.get("bar"));

}
 

/**
 * An example for method access.
 */
public static void example(final Output out) throws Exception {
    /*
     * First step is to retrieve an instance of a JexlEngine;
     * it might be already existing and shared or created anew.
     */
    JexlEngine jexl = new JexlBuilder().create();
    /*
     *  Second make a jexlContext and put stuff in it
     */
    JexlContext jc = new MapContext();

    /*
     * The Java equivalents of foo and number for comparison and checking
     */
    Foo foo = new Foo();
    Integer number = 10;

    jc.set("foo", foo);
    jc.set("number", number);

    /*
     *  access a method w/o args
     */
    JexlExpression e = jexl.createExpression("foo.getFoo()");
    Object o = e.evaluate(jc);
    out.print("value returned by the method getFoo() is : ", o, foo.getFoo());

    /*
     *  access a method w/ args
     */
    e = jexl.createExpression("foo.convert(1)");
    o = e.evaluate(jc);
    out.print("value of " + e.getParsedText() + " is : ", o, foo.convert(1));

    e = jexl.createExpression("foo.convert(1+7)");
    o = e.evaluate(jc);
    out.print("value of " + e.getParsedText() + " is : ", o, foo.convert(1+7));

    e = jexl.createExpression("foo.convert(1+number)");
    o = e.evaluate(jc);
    out.print("value of " + e.getParsedText() + " is : ", o, foo.convert(1+ number));

    /*
     * access a property
     */
    e = jexl.createExpression("foo.bar");
    o = e.evaluate(jc);
    out.print("value returned for the property 'bar' is : ", o, foo.get("bar"));

}