better with files

+<?xml version="1.0" encoding="UTF-8"?>
+
+<fileset-config file-format-version="1.2.0" simple-config="false" sync-formatter="false">
+  <local-check-config name="maven-checkstyle-plugin validate-checkstyle" location="jar:file:/Users/ash/.m2/repository/org/onlab/tools/onos-build-conf/1.0/onos-build-conf-1.0.jar!/onos/checkstyle.xml" type="remote" description="maven-checkstyle-plugin configuration validate-checkstyle">
+    <property name="checkstyle.cache.file" value="${project_loc}/target/checkstyle-cachefile"/>
+    <property name="checkstyle.suppressions.file" value="/Users/ash/work/onos-next/providers/of/host/target/checkstyle-suppressions-validate-checkstyle.xml"/>
+    <property name="checkstyle.header.file" value="/Users/ash/work/onos-next/providers/of/host/target/checkstyle-header-validate-checkstyle.txt"/>
+  </local-check-config>
+  <fileset name="java-sources-validate-checkstyle" enabled="true" check-config-name="maven-checkstyle-plugin validate-checkstyle" local="true">
+    <file-match-pattern match-pattern="src/test/java.*\.java" include-pattern="true"/>
+    <file-match-pattern match-pattern="src/main/java/.*\.java" include-pattern="true"/>
+    <file-match-pattern match-pattern="src/main/resources.*\.properties" include-pattern="true"/>
+    <file-match-pattern match-pattern="src/test/resources.*\.properties" include-pattern="true"/>
+  </fileset>
+</fileset-config>

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.onlab.onos</groupId>
+        <artifactId>onos-of-providers</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>onos-of-provider-flow</artifactId>
+    <packaging>bundle</packaging>
+
+    <description>ONOS OpenFlow protocol flow provider</description>
+
+</project>

+package org.onlab.onos.provider.of.flow.impl;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.flow.FlowEntry;
+import org.onlab.onos.net.flow.FlowRule;
+import org.onlab.onos.net.flow.FlowRuleProvider;
+import org.onlab.onos.net.flow.FlowRuleProviderRegistry;
+import org.onlab.onos.net.flow.FlowRuleProviderService;
+import org.onlab.onos.net.provider.AbstractProvider;
+import org.onlab.onos.net.provider.ProviderId;
+import org.onlab.onos.net.topology.TopologyService;
+import org.onlab.onos.of.controller.OpenFlowController;
+import org.slf4j.Logger;
+
+/**
+ * Provider which uses an OpenFlow controller to detect network
+ * end-station hosts.
+ */
+@Component(immediate = true)
+public class OpenFlowRuleProvider extends AbstractProvider implements FlowRuleProvider {
+
+    private final Logger log = getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected FlowRuleProviderRegistry providerRegistry;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected OpenFlowController controller;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected TopologyService topologyService;
+
+    private FlowRuleProviderService providerService;
+
+    /**
+     * Creates an OpenFlow host provider.
+     */
+    public OpenFlowRuleProvider() {
+        super(new ProviderId("org.onlab.onos.provider.openflow"));
+    }
+
+    @Activate
+    public void activate() {
+        providerService = providerRegistry.register(this);
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        providerRegistry.unregister(this);
+        providerService = null;
+
+        log.info("Stopped");
+    }
+    @Override
+    public void applyFlowRule(FlowRule... flowRules) {
+        // TODO Auto-generated method stub
+
+    }
+
+    @Override
+    public void removeFlowRule(FlowRule... flowRules) {
+        // TODO Auto-generated method stub
+
+    }
+
+    @Override
+    public Iterable<FlowEntry> getFlowMetrics(DeviceId deviceId) {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+
+    //TODO: InternalFlowRuleProvider listening to stats and error and flowremoved.
+    // possibly barriers as well. May not be internal at all...
+
+
+}

+/**
+ * Provider that uses OpenFlow controller as a means of ending and receiving flow information.
+ */
+package org.onlab.onos.provider.of.flow.impl;