Package org.apache.camel.util

Class OgnlHelper

java.lang.Object
org.apache.camel.util.OgnlHelper
public final class OgnlHelper extends Object
Helper for Camel OGNL (Object-Graph Navigation Language) expressions.

  • Method Details

    • isValidOgnlExpression

      public static boolean isValidOgnlExpression(String expression)
      Tests whether or not the given String is a Camel OGNL expression.

      An expression is considered an OGNL expression when it contains either one of the following chars: . or [

      Parameters:
      expression - the String
      Returns:
      true if a Camel OGNL expression, otherwise false.

    • isInvalidValidOgnlExpression

      public static boolean isInvalidValidOgnlExpression(String expression)

    • validateMethodName

      public static void validateMethodName(String method)
      Validates whether the method name is using valid java identifiers in the name Will throw IllegalArgumentException if the method name is invalid.

    • isNullSafeOperator

      public static boolean isNullSafeOperator(String ognlExpression)
      Tests whether or not the given Camel OGNL expression is using the null safe operator or not.
      Parameters:
      ognlExpression - the Camel OGNL expression
      Returns:
      true if the null safe operator is used, otherwise false.

    • removeLeadingOperators

      public static String removeLeadingOperators(String ognlExpression)
      Removes any leading operators from the Camel OGNL expression.

      Will remove any leading of the following chars: ? or .

      Parameters:
      ognlExpression - the Camel OGNL expression
      Returns:
      the Camel OGNL expression without any leading operators.

    • removeTrailingOperators

      public static String removeTrailingOperators(String ognlExpression)
      Removes any trailing operators from the Camel OGNL expression.
      Parameters:
      ognlExpression - the Camel OGNL expression
      Returns:
      the Camel OGNL expression without any trailing operators.

    • removeOperators

      public static String removeOperators(String ognlExpression)

    • isOgnlIndex

      public static KeyValueHolder<String,String> isOgnlIndex(String ognlExpression)

    • splitOgnl

      public static List<String> splitOgnl(String ognl)
      Regular expression with repeating groups is a pain to get right and then nobody understands the reg exp afterwards. So we use a bit ugly/low-level Java code to split the OGNL into methods.
      Parameters:
      ognl - the ognl expression
      Returns:
      a list of methods, will return an empty list, if ognl expression has no methods
      Throws:
      IllegalArgumentException - if the last method has a missing ending parenthesis

    • methodAsDoubleQuotes

      public static String methodAsDoubleQuotes(String ognl)