INT-777 Added support for EL-based filters.

org.springframework.integration/src/test/java/org/springframework/integration/filter/SpelFilterIntegrationTests-context.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans:beans xmlns="http://www.springframework.org/schema/integration"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:beans="http://www.springframework.org/schema/beans"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans
+			http://www.springframework.org/schema/beans/spring-beans.xsd
+			http://www.springframework.org/schema/integration
+			http://www.springframework.org/schema/integration/spring-integration.xsd">
+
+	<channel id="input"/>
+
+	<channel id="positives">
+		<queue/>
+	</channel>
+
+	<channel id="discards">
+		<queue/>
+	</channel>
+
+	<filter input-channel="input" expression="payload > 0" output-channel="positives" discard-channel="discards"/>
+
+</beans:beans>

org.springframework.integration/src/test/java/org/springframework/integration/filter/SpelFilterIntegrationTests.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2002-2009 the original author or authors.
+ *
+ * Licensed 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.springframework.integration.filter;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.integration.channel.PollableChannel;
+import org.springframework.integration.core.MessageChannel;
+import org.springframework.integration.message.GenericMessage;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+/**
+ * @author Mark Fisher
+ */
+@ContextConfiguration
+@RunWith(SpringJUnit4ClassRunner.class)
+public class SpelFilterIntegrationTests {
+
+	@Autowired @Qualifier("input")
+	private MessageChannel input;
+
+	@Autowired @Qualifier("positives")
+	private PollableChannel positives;
+
+	@Autowired @Qualifier("discards")
+	private PollableChannel discards;
+
+
+	@Test
+	public void filter() {
+		this.input.send(new GenericMessage<Integer>(1));
+		this.input.send(new GenericMessage<Integer>(0));
+		this.input.send(new GenericMessage<Integer>(99));
+		this.input.send(new GenericMessage<Integer>(-99));
+		assertEquals(new Integer(1), positives.receive(0).getPayload());
+		assertEquals(new Integer(99), positives.receive(0).getPayload());
+		assertEquals(new Integer(0), discards.receive(0).getPayload());
+		assertEquals(new Integer(-99), discards.receive(0).getPayload());
+		assertNull(positives.receive(0));
+		assertNull(discards.receive(0));
+	}
+
+}