Examples with CompositeStringExpression org.springframework.expression.common.CompositeStringExpression used on opensource projects

Example 1 with CompositeStringExpression

use of org.springframework.expression.common.CompositeStringExpression in project spring-framework by spring-projects.

the class TemplateExpressionParsingTests method testNestedExpressions.

@Test
public void testNestedExpressions() throws Exception {
    SpelExpressionParser parser = new SpelExpressionParser();
    // treat the nested ${..} as a part of the expression
    Expression ex = parser.parseExpression("hello ${listOfNumbersUpToTen.$[#this<5]} world", DEFAULT_TEMPLATE_PARSER_CONTEXT);
    String s = ex.getValue(TestScenarioCreator.getTestEvaluationContext(), String.class);
    assertEquals("hello 4 world", s);
    // not a useful expression but tests nested expression syntax that clashes with template prefix/suffix
    ex = parser.parseExpression("hello ${listOfNumbersUpToTen.$[#root.listOfNumbersUpToTen.$[#this%2==1]==3]} world", DEFAULT_TEMPLATE_PARSER_CONTEXT);
    assertEquals(CompositeStringExpression.class, ex.getClass());
    CompositeStringExpression cse = (CompositeStringExpression) ex;
    Expression[] exprs = cse.getExpressions();
    assertEquals(3, exprs.length);
    assertEquals("listOfNumbersUpToTen.$[#root.listOfNumbersUpToTen.$[#this%2==1]==3]", exprs[1].getExpressionString());
    s = ex.getValue(TestScenarioCreator.getTestEvaluationContext(), String.class);
    assertEquals("hello  world", s);
    ex = parser.parseExpression("hello ${listOfNumbersUpToTen.$[#this<5]} ${listOfNumbersUpToTen.$[#this>5]} world", DEFAULT_TEMPLATE_PARSER_CONTEXT);
    s = ex.getValue(TestScenarioCreator.getTestEvaluationContext(), String.class);
    assertEquals("hello 4 10 world", s);
    try {
        ex = parser.parseExpression("hello ${listOfNumbersUpToTen.$[#this<5]} ${listOfNumbersUpToTen.$[#this>5] world", DEFAULT_TEMPLATE_PARSER_CONTEXT);
        fail("Should have failed");
    } catch (ParseException pe) {
        assertEquals("No ending suffix '}' for expression starting at character 41: ${listOfNumbersUpToTen.$[#this>5] world", pe.getSimpleMessage());
    }
    try {
        ex = parser.parseExpression("hello ${listOfNumbersUpToTen.$[#root.listOfNumbersUpToTen.$[#this%2==1==3]} world", DEFAULT_TEMPLATE_PARSER_CONTEXT);
        fail("Should have failed");
    } catch (ParseException pe) {
        assertEquals("Found closing '}' at position 74 but most recent opening is '[' at position 30", pe.getSimpleMessage());
    }
}