Package org.springframework.expression

Examples of org.springframework.expression.ExpressionParser

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     */
   
    public Map<String,Object> process(final Map<String,Object> local,final List<String> flowArgs) {
        HashMap<String, Object> output = new HashMap<>(local);
        SpringStepContext stepContext=new SpringStepContext(flowArgs,local);
        ExpressionParser parser = new SpelExpressionParser();
       
        for(Assignment that:assignments) {
            Expression e=parser.parseExpression(that.getExpression());
            StandardEvaluationContext c=new StandardEvaluationContext(stepContext);
            stepContext.assignVariables(c);
            Object value = e.getValue(c);
            logger.trace("parsing ["+that+"] with result +["+value+"]");
            if (output.containsKey(that.getAssignTo())) {
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*/
public class SpElValueExpressionEvaluator implements ValueExpressionEvaluator {

    /** {@inheritDoc } */
    public Object evaluate(Object context, String expression) {
        final ExpressionParser parser = new SpelExpressionParser();
        return parser.parseExpression(expression).getValue(context);
    }
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    }

    public PreInvocationAttribute createPreInvocationAttribute(String preFilterAttribute, String filterObject, String preAuthorizeAttribute) {
        try {
            // TODO: Optimization of permitAll
            ExpressionParser parser = getParser();
            Expression preAuthorizeExpression = preAuthorizeAttribute == null ? parser.parseExpression("permitAll") : parser.parseExpression(preAuthorizeAttribute);
            Expression preFilterExpression = preFilterAttribute == null ? null : parser.parseExpression(preFilterAttribute);
            return new PreInvocationExpressionAttribute(preFilterExpression, filterObject, preAuthorizeExpression);
        } catch (ParseException e) {
            throw new IllegalArgumentException("Failed to parse expression '" + e.getExpressionString() + "'", e);
        }
    }
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        }
    }

    public PostInvocationAttribute createPostInvocationAttribute(String postFilterAttribute, String postAuthorizeAttribute) {
        try {
            ExpressionParser parser = getParser();
            Expression postAuthorizeExpression = postAuthorizeAttribute == null ? null : parser.parseExpression(postAuthorizeAttribute);
            Expression postFilterExpression = postFilterAttribute == null ? null : parser.parseExpression(postFilterAttribute);

            if (postFilterExpression != null || postAuthorizeExpression != null) {
                return new PostInvocationExpressionAttribute(postFilterExpression, postAuthorizeExpression);
            }
        } catch (ParseException e) {
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        bean.getConstructorArgumentValues().addGenericArgumentValue("ROLE_A");
        appContext.registerBeanDefinition("role", bean);
        handler.setApplicationContext(appContext);

        EvaluationContext ctx = handler.createEvaluationContext(mock(Authentication.class), mock(FilterInvocation.class));
        ExpressionParser parser = handler.getExpressionParser();
        assertTrue(parser.parseExpression("@role.getAttribute() == 'ROLE_A'").getValue(ctx, Boolean.class));
        assertTrue(parser.parseExpression("@role.attribute == 'ROLE_A'").getValue(ctx, Boolean.class));
    }
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    private final Expression expression;
    private final MapExpressionMethods methods;

    public MapPartitionResolver(String expression, EvaluationContext evaluationContext) {
      ExpressionParser parser = new SpelExpressionParser();
      this.expression = parser.parseExpression(expression);
      this.methods = new MapExpressionMethods(evaluationContext);
      log.info("Using expression=[" + this.expression.getExpressionString() + "]");
    }
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        return true;
    }

    public int vote(Authentication authentication, State object, Collection<ConfigAttribute> attributes) {
        EvaluationContext ctx = expressionHandler.createEvaluationContext(authentication, object);
        ExpressionParser parser = new SpelExpressionParser();
        Expression exp = parser.parseExpression(attributes.iterator().next().getAttribute());
        return ExpressionUtils.evaluateAsBoolean(exp, ctx) ? ACCESS_GRANTED : ACCESS_DENIED;
    }
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   */
  public static Boolean evaluateExpression(Object obj, String expression) {
    if (StringUtil.isEmpty(expression))
      return false;
    try {
      ExpressionParser parser = new SpelExpressionParser();
      Expression exp = parser.parseExpression(expression);
      return exp.getValue(obj, Boolean.class);    
    } catch (Exception e) {
      _log.debug("Failed to evaluate expression ["+expression+"] for object ["+obj.getClass()+"].");
      _log.debug(e.getMessage());
      return false;
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    evaluate("testMap['monday']", "montag", String.class);
  }

  @Test
  public void testCustomMapAccessor() throws Exception {
    ExpressionParser parser = new SpelExpressionParser();
    StandardEvaluationContext ctx = TestScenarioCreator.getTestEvaluationContext();
    ctx.addPropertyAccessor(new MapAccessor());

    Expression expr = parser.parseExpression("testMap.monday");
    Object value = expr.getValue(ctx, String.class);
    assertEquals("montag", value);
  }
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    assertEquals("montag", value);
  }

  @Test
  public void testVariableMapAccess() throws Exception {
    ExpressionParser parser = new SpelExpressionParser();
    StandardEvaluationContext ctx = TestScenarioCreator.getTestEvaluationContext();
    ctx.setVariable("day", "saturday");

    Expression expr = parser.parseExpression("testMap[#day]");
    Object value = expr.getValue(ctx, String.class);
    assertEquals("samstag", value);
  }
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