/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.camel.scala.dsl.languages

import org.apache.camel.{Expression, Predicate, Exchange}
import org.apache.camel.spi.Language

/**
 * A language which has a function that can be evaluated as either an {@link Expression}
 * or {@link Predicate}.
 */
class LanguageFunction(language: Language, expression: String) extends Predicate with Expression {

  def matches(exchange: Exchange) = {
    language.createPredicate(expression).matches(exchange)
  }

  def evaluate[T](exchange: Exchange, toType : Class[T]) = {
    language.createExpression(expression).evaluate(exchange, toType)
  }

  override def toString : String = language + "(" + expression + ")"

}