Package org.apache.camel.util
Class OgnlHelper
java.lang.Object
org.apache.camel.util.OgnlHelper
Helper for Camel OGNL (Object-Graph Navigation Language) expressions.
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Method Summary
Modifier and TypeMethodDescriptionstatic boolean
isInvalidValidOgnlExpression
(String expression) static boolean
isNullSafeOperator
(String ognlExpression) Tests whether or not the given Camel OGNL expression is using the null safe operator or not.static KeyValueHolder<String,
String> isOgnlIndex
(String ognlExpression) static boolean
isValidOgnlExpression
(String expression) Tests whether or not the given String is a Camel OGNL expression.static String
methodAsDoubleQuotes
(String ognl) static String
removeLeadingOperators
(String ognlExpression) Removes any leading operators from the Camel OGNL expression.static String
removeOperators
(String ognlExpression) static String
removeTrailingOperators
(String ognlExpression) Removes any trailing operators from the Camel OGNL expression.Regular expression with repeating groups is a pain to get right and then nobody understands the reg exp afterwards.static void
validateMethodName
(String method) Validates whether the method name is using valid java identifiers in the name Will throwIllegalArgumentException
if the method name is invalid.
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Method Details
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isValidOgnlExpression
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.
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isInvalidValidOgnlExpression
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validateMethodName
Validates whether the method name is using valid java identifiers in the name Will throwIllegalArgumentException
if the method name is invalid. -
isNullSafeOperator
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.
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removeLeadingOperators
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.
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removeTrailingOperators
Removes any trailing operators from the Camel OGNL expression.- Parameters:
ognlExpression
- the Camel OGNL expression- Returns:
- the Camel OGNL expression without any trailing operators.
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removeOperators
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isOgnlIndex
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splitOgnl
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
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methodAsDoubleQuotes
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