INT-1542: Add file-regex attribute to file:inbound-channel-adapter

spring-integration-file/src/test/java/org/springframework/integration/file/config/FileInboundChannelAdapterWithRegexPatternParserTests-context.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans:beans xmlns="http://www.springframework.org/schema/integration/file"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:beans="http://www.springframework.org/schema/beans"
+	xmlns:integration="http://www.springframework.org/schema/integration"
+	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
+			http://www.springframework.org/schema/integration/file
+			http://www.springframework.org/schema/integration/file/spring-integration-file.xsd">
+
+	<beans:bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" />
+
+    <inbound-channel-adapter id="adapterWithRegexPattern"
+			directory="file:${java.io.tmpdir}"
+			filename-regex="^.*\.txt$" auto-startup="false">
+		<integration:poller fixed-rate="1000"/>
+	</inbound-channel-adapter>
+
+
+</beans:beans>

spring-integration-file/src/test/java/org/springframework/integration/file/config/FileInboundChannelAdapterWithRegexPatternParserTests.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2002-2010 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.file.config;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.DirectFieldAccessor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.context.ApplicationContext;
+import org.springframework.integration.channel.AbstractMessageChannel;
+import org.springframework.integration.endpoint.AbstractEndpoint;
+import org.springframework.integration.file.FileReadingMessageSource;
+import org.springframework.integration.file.filters.*;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import java.io.File;
+import java.util.Set;
+import java.util.regex.Pattern;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.*;
+
+/**
+ *
+ * @author Mark Fisher
+ * @author Iwein Fuld
+ *
+ * @see org.springframework.integration.file.config.FileInboundChannelAdapterWithPatternParserTests
+ */
+@ContextConfiguration
+@RunWith(SpringJUnit4ClassRunner.class)
+public class FileInboundChannelAdapterWithRegexPatternParserTests {
+
+    @Autowired(required = true)
+    private ApplicationContext context;
+
+    private DirectFieldAccessor accessor;
+
+	@Autowired(required = true)
+    public void setSource(FileReadingMessageSource source) {
+        this.accessor = new DirectFieldAccessor(source);
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    public void regexFilter() {
+        DirectFieldAccessor scannerAccessor = new DirectFieldAccessor(accessor.getPropertyValue("scanner"));
+		Object extractedFilter = scannerAccessor.getPropertyValue("filter");
+		assertThat(extractedFilter, is(CompositeFileListFilter.class));
+		Set<FileListFilter<?>> filters = (Set<FileListFilter<?>>) new DirectFieldAccessor(
+				extractedFilter).getPropertyValue("fileFilters");
+        Pattern pattern = null;
+        for (FileListFilter<?> filter : filters) {
+            if (filter instanceof PatternMatchingFileListFilter) {
+                pattern = (Pattern) new DirectFieldAccessor(filter).getPropertyValue("pattern");
+            }
+        }
+        assertNotNull("expected SimplePatternFileListFilterTest", pattern);
+        assertEquals("^.*\\.txt$", pattern.pattern());
+    }
+
+}