org.apache.camel
Interface Expression

All Known Implementing Classes:

AssertionClause.PredicateValueBuilder, BeanExpression, ConstantExpression, ELExpression, ExpressionAdapter, ExpressionAdapter, ExpressionClause, ExpressionDefinition, ExpressionSupport, ExpressionSupport, GroovyExpression, HeaderExpression, JavaScriptExpression, JXPathExpression, LanguageExpression, MethodCallExpression, MvelExpression, NamespaceAwareExpression, OgnlExpression, PhpExpression, PropertyExpression, PythonExpression, RefExpression, RubyExpression, SimpleBuilder, SimpleExpression, SpELExpression, SqlExpression, TokenizerExpression, TokenPairExpressionIterator, TokenXMLExpressionIterator, TokenXMLPairExpressionIterator, ValueBuilder, XPathBuilder, XPathExpression, XQueryExpression

public interface Expression

An expression provides a plugin strategy for evaluating expressions on a message exchange to support things like scripting languages, XQuery or SQL as well as any arbitrary Java expression.

Version:

Method Summary

<T> T

evaluate(Exchange exchange, Class<T> type) Returns the value of the expression on the given exchange

Method Detail

evaluate

<T> T evaluate(Exchange exchange,
               Class<T> type)

Returns the value of the expression on the given exchange

Parameters:

exchange - the message exchange on which to evaluate the expression

type - the expected type of the evaluation result

Returns:

the value of the expression