Examples of org.apache.lucene.expressions.Expression.evaluate()

Class org.apache.lucene.expressions.Expression

Examples of org.apache.lucene.expressions.Expression.evaluate()

org.apache.lucene.expressions.Expression.evaluate()
Evaluates the expression for the given document. @param document docId of the document to compute a value for @param functionValues {@link FunctionValues} for each element of {@link #variables}. @return The computed value of the expression for the given document.

    Map<String,Method> mixedFunctions = new HashMap<>(JavascriptCompiler.DEFAULT_FUNCTIONS);
    mixedFunctions.putAll(functions);
    expr = JavascriptCompiler.compile("bar()", mixedFunctions, childLoader);
    assertEquals(2.0, expr.evaluate(0, null), DELTA);
    expr = JavascriptCompiler.compile("sqrt(20)", mixedFunctions, childLoader);
    assertEquals(Math.sqrt(20), expr.evaluate(0, null), DELTA);
    
    // use our classloader, not the foreign one, which should fail!
    try {
      JavascriptCompiler.compile("bar()", mixedFunctions, thisLoader);
      fail();

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    Map<String,Method> functions = new HashMap<>();
    functions.put("foo", StaticThrowingException.class.getMethod("method"));
    String source = "3 * foo() / 5";
    Expression expr = JavascriptCompiler.compile(source, functions, getClass().getClassLoader());
    try {
      expr.evaluate(0, null);
      fail();
    } catch (ArithmeticException e) {
      assertEquals(MESSAGE, e.getMessage());
      StringWriter sw = new StringWriter();
      PrintWriter pw = new PrintWriter(sw);

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  public void testNamespaces() throws Exception {
    Map<String, Method> functions = new HashMap<>();
    functions.put("foo.bar", getClass().getMethod("zeroArgMethod"));
    String source = "foo.bar()";
    Expression expr = JavascriptCompiler.compile(source, functions, getClass().getClassLoader());
    assertEquals(5, expr.evaluate(0, null), DELTA);
  }
}

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