HONEYCOMB-389 - Static yang binding api and impl

Also provides ignore option for default module list generation

Change-Id: I9e10215491c964e6e88f90d6a3ad4335c94ec7d2
Signed-off-by: Jan Srnicek <jsrnicek@cisco.com>

6 files changed, 296 insertions, 0 deletions

diff --git a/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/JAXBContextHolder.java b/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/JAXBContextHolder.java
new file mode 100644
index 000000000..ed1aee645
--- /dev/null
+++ b/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/JAXBContextHolder.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.yang;
+
+import javax.annotation.Nonnull;
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.JAXBException;
+
+abstract class JAXBContextHolder {
+    private final JAXBContext ctx;
+
+    protected JAXBContextHolder(@Nonnull final Class<?>... ctxClasses) {
+        try {
+            ctx = JAXBContext.newInstance(ctxClasses);
+        } catch (JAXBException e) {
+            throw new IllegalStateException("Unable to create JAXB context", e);
+        }
+    }
+
+    protected JAXBContext getCtx() {
+        return ctx;
+    }
+}
diff --git a/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/YangModuleWhitelistReader.java b/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/YangModuleWhitelistReader.java
new file mode 100644
index 000000000..f4897c275
--- /dev/null
+++ b/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/YangModuleWhitelistReader.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.yang;
+
+import static java.lang.String.format;
+
+import java.nio.file.Path;
+import javax.annotation.Nonnull;
+import javax.xml.bind.JAXBException;
+import javax.xml.bind.Unmarshaller;
+
+public class YangModuleWhitelistReader extends JAXBContextHolder {
+
+    public YangModuleWhitelistReader() {
+        super(YangModuleWhitelist.class);
+    }
+
+    @Nonnull
+    public YangModuleWhitelist read(@Nonnull final Path path) {
+        final Unmarshaller unmarshaller = createUnmarshaller();
+        return YangModuleWhitelist.class.cast(readWhitelist(path, unmarshaller));
+    }
+
+    private static Object readWhitelist(final Path path, final Unmarshaller unmarshaller) {
+        try {
+            return unmarshaller.unmarshal(path.toFile());
+        } catch (JAXBException e) {
+            throw new IllegalStateException(format("Unable to read whitelist from %s", path), e);
+        }
+    }
+
+    private Unmarshaller createUnmarshaller() {
+        try {
+            return getCtx().createUnmarshaller();
+        } catch (JAXBException e) {
+            throw new IllegalStateException("Unable to create unmarshaller", e);
+        }
+    }
+}
diff --git a/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/YangModuleWhitelistWriter.java b/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/YangModuleWhitelistWriter.java
new file mode 100644
index 000000000..d14b2428f
--- /dev/null
+++ b/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/YangModuleWhitelistWriter.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.yang;
+
+import java.nio.file.Path;
+import java.util.Objects;
+import javax.annotation.Nonnull;
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.JAXBException;
+import javax.xml.bind.Marshaller;
+import javax.xml.bind.PropertyException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class YangModuleWhitelistWriter extends JAXBContextHolder {
+
+    private static final Logger LOG = LoggerFactory.getLogger(YangModuleWhitelistWriter.class);
+
+    public YangModuleWhitelistWriter() {
+        super(YangModuleWhitelist.class);
+    }
+
+    /**
+     * Output serialized whitelist on specified path
+     *
+     * @param whitelist whitelist configuration
+     * @param outPath   output path
+     */
+    public void write(@Nonnull final YangModuleWhitelist whitelist,
+                      @Nonnull final Path outPath,
+                      final boolean formatOutput) {
+        Objects.requireNonNull(whitelist, "Cannot white null whitelist");
+        // mashaller is not synchronized and lightweight, best practice is to create it per request(as opose to ctx,
+        // that should be created just once)
+        final Marshaller marshaller = createMarshaller(getCtx());
+        setupPrettyPrint(marshaller, formatOutput);
+        whiteWhitelist(whitelist, outPath, marshaller);
+    }
+
+    private static void whiteWhitelist(final YangModuleWhitelist whitelist, final Path outPath,
+                                       final Marshaller marshaller) {
+        try {
+            LOG.debug("Writing whitelist {} to file {}", whitelist, outPath);
+            marshaller.marshal(whitelist, outPath.toFile());
+            LOG.debug("Whitelist successfully written to file {}", outPath);
+        } catch (JAXBException e) {
+            throw new IllegalStateException("Unable to write whitelist", e);
+        }
+    }
+
+    private static void setupPrettyPrint(final Marshaller marshaller, final boolean value) {
+        try {
+            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, value);
+        } catch (PropertyException e) {
+            throw new IllegalStateException("Unable to setup pretty print");
+        }
+    }
+
+    private static Marshaller createMarshaller(final JAXBContext ctx) {
+        try {
+            return ctx.createMarshaller();
+        } catch (JAXBException e) {
+            throw new IllegalStateException("Unable to create marshaller", e);
+        }
+    }
+}
diff --git a/common/yang-whitelist/yang-whitelist-impl/src/test/java/io/fd/honeycomb/yang/YangModuleWhitelistReaderTest.java b/common/yang-whitelist/yang-whitelist-impl/src/test/java/io/fd/honeycomb/yang/YangModuleWhitelistReaderTest.java
new file mode 100644
index 000000000..6ab917a09
--- /dev/null
+++ b/common/yang-whitelist/yang-whitelist-impl/src/test/java/io/fd/honeycomb/yang/YangModuleWhitelistReaderTest.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.yang;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertThat;
+
+import java.nio.file.Paths;
+import java.util.List;
+import org.hamcrest.CoreMatchers;
+import org.junit.Before;
+import org.junit.Test;
+
+public class YangModuleWhitelistReaderTest {
+
+    private YangModuleWhitelistReader reader;
+
+    @Before
+    public void init() throws Exception {
+        reader = new YangModuleWhitelistReader();
+    }
+
+    @Test
+    public void read() throws Exception {
+        final YangModuleWhitelist whitelist = reader.read(
+                Paths.get(this.getClass().getClassLoader().getResource("expected-whitelist.xml").getPath()));
+
+        assertNotNull(whitelist);
+        final List<Module> modules = whitelist.getModules();
+        assertEquals(2, modules.size());
+
+        final Module moduleA = new Module();
+        final Module moduleB = new Module();
+        moduleA.setPckg("module.a.package");
+        moduleA.setDescription("desc");
+
+        moduleB.setPckg("module.b.package");
+
+        assertThat(modules, CoreMatchers.hasItems(moduleA, moduleB));
+    }
+}
\ No newline at end of file
diff --git a/common/yang-whitelist/yang-whitelist-impl/src/test/java/io/fd/honeycomb/yang/YangModuleWhitelistWriterTest.java b/common/yang-whitelist/yang-whitelist-impl/src/test/java/io/fd/honeycomb/yang/YangModuleWhitelistWriterTest.java
new file mode 100644
index 000000000..c0ca170b8
--- /dev/null
+++ b/common/yang-whitelist/yang-whitelist-impl/src/test/java/io/fd/honeycomb/yang/YangModuleWhitelistWriterTest.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.yang;
+
+
+import static org.junit.Assert.assertEquals;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.io.Resources;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.stream.Collectors;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+public class YangModuleWhitelistWriterTest {
+
+    private YangModuleWhitelistWriter writer;
+    private Path path;
+
+    @Before
+    public void init() throws IOException {
+        writer = new YangModuleWhitelistWriter();
+        path = Files.createTempFile("tmp", "whitelist");
+    }
+
+    @Test
+    public void write() throws Exception {
+        final Module moduleA = new Module();
+        final Module moduleB = new Module();
+        moduleA.setPckg("module.a.package");
+        moduleA.setDescription("desc");
+
+        moduleB.setPckg("module.b.package");
+
+        final YangModuleWhitelist whitelist = new YangModuleWhitelist();
+        whitelist.setModules(ImmutableList.of(moduleA, moduleB));
+
+        writer.write(whitelist, path, false);
+        final String output = Files.readAllLines(path).stream().collect(Collectors.joining());
+        final String expectedOutput = Resources
+                .toString(this.getClass().getClassLoader().getResource("expected-whitelist.xml"),
+                        StandardCharsets.UTF_8);
+        assertEquals(expectedOutput, output);
+    }
+
+
+    @After
+    public void clean() {
+        path.toFile().delete();
+    }
+}
\ No newline at end of file
diff --git a/common/yang-whitelist/yang-whitelist-impl/src/test/resources/expected-whitelist.xml b/common/yang-whitelist/yang-whitelist-impl/src/test/resources/expected-whitelist.xml
new file mode 100644
index 000000000..6ec5c22ae
--- /dev/null
+++ b/common/yang-whitelist/yang-whitelist-impl/src/test/resources/expected-whitelist.xml
@@ -0,0 +1 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?><yangModuleWhitelist><modules><module><description>desc</description><package>module.a.package</package></module><module><package>module.b.package</package></module></modules></yangModuleWhitelist>
\ No newline at end of file