Move V3poUtils for vpp-translate-utils

Change-Id: Id6218d5136e0e4c0f1848da20bba784b71feee13
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>

2 files changed, 171 insertions, 0 deletions

diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtils.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtils.java
new file mode 100644
index 000000000..9f6f1f676
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtils.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2016 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.v3po.translate.v3po.util;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import com.google.common.base.Splitter;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+import java.util.function.BiConsumer;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4AddressNoZone;
+import org.openvpp.jvpp.dto.JVppReply;
+
+public final class TranslateUtils {
+
+    // TODO move to vpp-translate-utils
+
+    public static final Splitter COLON_SPLITTER = Splitter.on(':');
+
+    private TranslateUtils() {}
+
+    public static <REP extends JVppReply<?>> REP getReply(Future<REP> future) {
+        try {
+            return future.get();
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            throw new IllegalStateException("Interrupted", e);
+        } catch (ExecutionException e) {
+            // Execution exception should not occur, since we are using return codes for errors
+            // TODO fix when using exceptions instead of return codes
+            throw new IllegalArgumentException("Future " + " should not fail with an exception", e);
+        }
+    }
+
+    public static byte[] ipv4AddressNoZoneToArray(final Ipv4AddressNoZone ipv4Addr) {
+        byte[] retval = new byte[4];
+        String[] dots = ipv4Addr.getValue().split("\\.");
+
+        for (int d = 3; d >= 0; d--) {
+            retval[d] = (byte) (Short.parseShort(dots[3 - d]) & 0xff);
+        }
+        return retval;
+    }
+
+    /**
+     * Return (interned) string from byte array while removing \u0000.
+     * Strings represented as fixed length byte[] from vpp contain \u0000.
+     */
+    public static String toString(final byte[] cString) {
+        return new String(cString).replaceAll("\\u0000", "").intern();
+    }
+
+    /**
+     * Parse string represented mac address (using ":" as separator) into a byte array
+     */
+    @Nonnull
+    public static byte[] parseMac(@Nonnull final String macAddress) {
+        final List<String> parts = COLON_SPLITTER.splitToList(macAddress);
+        checkArgument(parts.size() == 6, "Mac address is expected to have 6 parts but was: %s", macAddress);
+        return parseMacLikeString(parts);
+    }
+
+    private static byte[] parseMacLikeString(final List<String> strings) {
+        return strings.stream().limit(6).map(TranslateUtils::parseHexByte).collect(
+            () -> new byte[strings.size()],
+            new BiConsumer<byte[], Byte>() {
+
+                private int i = -1;
+
+                @Override
+                public void accept(final byte[] bytes, final Byte aByte) {
+                    bytes[++i] = aByte;
+                }
+            },
+            (bytes, bytes2) -> {
+                throw new UnsupportedOperationException("Parallel collect not supported");
+            });
+    }
+
+    private static byte parseHexByte(final String aByte) {
+        return (byte)Integer.parseInt(aByte, 16);
+    }
+
+   /**
+     * Returns 0 if argument is null or false, 1 otherwise.
+     * @param value Boolean value to be converted
+     * @return byte value equal to 0 or 1
+     */
+    public static byte booleanToByte(@Nullable final Boolean value) {
+        return value != null && value ? (byte) 1 : (byte) 0;
+    }
+}
diff --git a/v3po/vpp-translate-utils/src/test/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtilsTest.java b/v3po/vpp-translate-utils/src/test/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtilsTest.java
new file mode 100644
index 000000000..a3c37bade
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/test/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtilsTest.java
@@ -0,0 +1,62 @@
+package io.fd.honeycomb.v3po.translate.v3po.util;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+
+import io.fd.honeycomb.v3po.translate.v3po.util.TranslateUtils;
+import org.junit.Test;
+
+public class TranslateUtilsTest {
+
+    @Test
+    public void testToString() {
+        final byte[] expected = "test".getBytes();
+        final byte[] cString = new byte[expected.length+10];
+        System.arraycopy(expected, 0, cString, 0, expected.length);
+        final String jString = TranslateUtils.toString(cString);
+        assertArrayEquals(expected, jString.getBytes());
+    }
+
+    @Test
+    public void testParseMac() throws Exception {
+        byte[] bytes = TranslateUtils.parseMac("00:fF:7f:15:5e:A9");
+        assertMac(bytes);
+    }
+
+    private void assertMac(final byte[] bytes) {
+        assertEquals(6, bytes.length);
+        assertEquals((byte)0, bytes[0]);
+        assertEquals((byte)255, bytes[1]);
+        assertEquals((byte)127, bytes[2]);
+        assertEquals((byte)21, bytes[3]);
+        assertEquals((byte)94, bytes[4]);
+        assertEquals((byte)169, bytes[5]);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testParseMacLonger() throws Exception {
+        byte[] bytes = TranslateUtils.parseMac("00:fF:7f:15:5e:A9:88:77");
+        assertMac(bytes);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testParseMacShorter() throws Exception {
+        TranslateUtils.parseMac("00:fF:7f");
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testParseRandomString() throws Exception {
+        TranslateUtils.parseMac("random{}}@$*&*!");
+    }
+
+    @Test(expected = NumberFormatException.class)
+    public void testParseMacNumberFormatEx() throws Exception {
+        TranslateUtils.parseMac("00:XX:7f:15:5e:77\"");
+    }
+
+   public void testBooleanToByte() {
+       assertEquals(0, TranslateUtils.booleanToByte(null));
+       assertEquals(0, TranslateUtils.booleanToByte(false));
+       assertEquals(1, TranslateUtils.booleanToByte(true));
+   }
+}
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