Examples of org.springframework.expression.ExpressionParser.parseExpression()

Class org.springframework.expression.ExpressionParser

Examples of org.springframework.expression.ExpressionParser.parseExpression()

org.springframework.expression.ExpressionParser.parseExpression()
Parse the expression string and return an Expression object you can use for repeated evaluation.
Some examples:
```
 3 + 4 name.firstName 
```
@param expressionString the raw expression string to parse @return an evaluator for the parsed expression @throws ParseException an exception occurred during parsing

    assertEquals("",value);


    // Now turn off growing and reference off the end
    ctx = new StandardEvaluationContext(instance);
    parser = new SpelExpressionParser(new SpelParserConfiguration(false, false));
    e =  parser.parseExpression("listOfStrings[3]");
    try {
      e.getValue(ctx,String.class);
      fail();
    } catch (SpelEvaluationException see) {
      assertEquals(SpelMessage.COLLECTION_INDEX_OUT_OF_BOUNDS,see.getMessageCode());

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  @Test
  public void increment01root() {
    Integer i = 42;
    StandardEvaluationContext ctx = new StandardEvaluationContext(i);
    ExpressionParser parser = new SpelExpressionParser(new SpelParserConfiguration(true, true));
    Expression e =  parser.parseExpression("#this++");
    assertEquals(42,i.intValue());
    try {
      e.getValue(ctx,Integer.class);
      fail();
    } catch (SpelEvaluationException see) {

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    StandardEvaluationContext ctx = new StandardEvaluationContext(helper);
    ExpressionParser parser = new SpelExpressionParser(new SpelParserConfiguration(true, true));
    Expression e = null;


    // BigDecimal
    e = parser.parseExpression("bd++");
    assertTrue(new BigDecimal("2").equals(helper.bd));
    BigDecimal return_bd = e.getValue(ctx,BigDecimal.class);
    assertTrue(new BigDecimal("2").equals(return_bd));
    assertTrue(new BigDecimal("3").equals(helper.bd));

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    BigDecimal return_bd = e.getValue(ctx,BigDecimal.class);
    assertTrue(new BigDecimal("2").equals(return_bd));
    assertTrue(new BigDecimal("3").equals(helper.bd));


    // double
    e = parser.parseExpression("ddd++");
    assertEquals(2.0d,helper.ddd,0d);
    double return_ddd = e.getValue(ctx,Double.TYPE);
    assertEquals(2.0d,return_ddd,0d);
    assertEquals(3.0d,helper.ddd,0d);

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    double return_ddd = e.getValue(ctx,Double.TYPE);
    assertEquals(2.0d,return_ddd,0d);
    assertEquals(3.0d,helper.ddd,0d);


    // float
    e = parser.parseExpression("fff++");
    assertEquals(3.0f,helper.fff,0d);
    float return_fff = e.getValue(ctx,Float.TYPE);
    assertEquals(3.0f,return_fff,0d);
    assertEquals(4.0f,helper.fff,0d);

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    float return_fff = e.getValue(ctx,Float.TYPE);
    assertEquals(3.0f,return_fff,0d);
    assertEquals(4.0f,helper.fff,0d);


    // long
    e = parser.parseExpression("lll++");
    assertEquals(66666L,helper.lll);
    long return_lll = e.getValue(ctx,Long.TYPE);
    assertEquals(66666L,return_lll);
    assertEquals(66667L,helper.lll);

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    long return_lll = e.getValue(ctx,Long.TYPE);
    assertEquals(66666L,return_lll);
    assertEquals(66667L,helper.lll);


    // int
    e = parser.parseExpression("iii++");
    assertEquals(42,helper.iii);
    int return_iii = e.getValue(ctx,Integer.TYPE);
    assertEquals(42,return_iii);
    assertEquals(43,helper.iii);
    return_iii = e.getValue(ctx,Integer.TYPE);

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    return_iii = e.getValue(ctx,Integer.TYPE);
    assertEquals(43,return_iii);
    assertEquals(44,helper.iii);


    // short
    e = parser.parseExpression("sss++");
    assertEquals(15,helper.sss);
    short return_sss = e.getValue(ctx,Short.TYPE);
    assertEquals(15,return_sss);
    assertEquals(16,helper.sss);
  }

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    ExpressionParser parser = new SpelExpressionParser(new SpelParserConfiguration(true, true));
    Expression e = null;




    // BigDecimal
    e = parser.parseExpression("++bd");
    assertTrue(new BigDecimal("2").equals(helper.bd));
    BigDecimal return_bd = e.getValue(ctx,BigDecimal.class);
    assertTrue(new BigDecimal("3").equals(return_bd));
    assertTrue(new BigDecimal("3").equals(helper.bd));

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    BigDecimal return_bd = e.getValue(ctx,BigDecimal.class);
    assertTrue(new BigDecimal("3").equals(return_bd));
    assertTrue(new BigDecimal("3").equals(helper.bd));


    // double
    e = parser.parseExpression("++ddd");
    assertEquals(2.0d,helper.ddd,0d);
    double return_ddd = e.getValue(ctx,Double.TYPE);
    assertEquals(3.0d,return_ddd,0d);
    assertEquals(3.0d,helper.ddd,0d);

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