*/
package org.opendaylight.mdsal.model.ietf.util;
+import static com.google.common.base.Preconditions.checkArgument;
+
import com.google.common.annotations.Beta;
-import com.google.common.base.Preconditions;
-import javax.annotation.Nonnull;
-import org.opendaylight.yangtools.yang.binding.util.StringValueObjectFactory;
+import java.util.Arrays;
+import org.eclipse.jdt.annotation.NonNull;
+import org.opendaylight.mdsal.binding.spec.reflect.StringValueObjectFactory;
/**
* Abstract utility class for dealing with MAC addresses as defined in the ietf-yang-types model. This class is
* used by revision-specific classes.
+ *
+ * @param <M> mac-address type
+ * @param <P> phys-address type
*/
@Beta
-public abstract class AbstractIetfYangUtil<T> {
+public abstract class AbstractIetfYangUtil<M, P> {
+ private static final int MAC_BYTE_LENGTH = 6;
private static final char[] HEX_CHARS = "0123456789abcdef".toCharArray();
- private final StringValueObjectFactory<T> factory;
+ private static final byte[] HEX_VALUES;
+ static {
+ final byte[] b = new byte['f' + 1];
+ Arrays.fill(b, (byte)-1);
+
+ for (char c = '0'; c <= '9'; ++c) {
+ b[c] = (byte)(c - '0');
+ }
+ for (char c = 'A'; c <= 'F'; ++c) {
+ b[c] = (byte)(c - 'A' + 10);
+ }
+ for (char c = 'a'; c <= 'f'; ++c) {
+ b[c] = (byte)(c - 'a' + 10);
+ }
- protected AbstractIetfYangUtil(final Class<T> clazz) {
- this.factory = StringValueObjectFactory.create(clazz, "00:00:00:00:00:00");
+ HEX_VALUES = b;
}
- private static final void appendHexByte(final StringBuilder sb, final byte b) {
- final int v = Byte.toUnsignedInt(b);
- sb.append(HEX_CHARS[v >>> 4]);
- sb.append(HEX_CHARS[v & 15]);
+ private final StringValueObjectFactory<M> macFactory;
+ private final StringValueObjectFactory<P> physFactory;
+
+ protected AbstractIetfYangUtil(final Class<M> macClass, final Class<P> physClass) {
+ this.macFactory = StringValueObjectFactory.create(macClass, "00:00:00:00:00:00");
+ this.physFactory = StringValueObjectFactory.create(physClass, "00:00");
+ }
+
+
+ /**
+ * Convert the value of a MacAddress into the canonical representation.
+ *
+ * @param macAddress Input MAC address
+ * @return A MacAddress containing the canonical representation.
+ * @throws NullPointerException if macAddress is null
+ */
+ public final @NonNull M canonizeMacAddress(final @NonNull M macAddress) {
+ final char[] input = getValue(macAddress).toCharArray();
+ return ensureLowerCase(input) ? macFactory.newInstance(String.valueOf(input)) : macAddress;
+ }
+
+ /**
+ * Create a MacAddress object holding the canonical representation of the 6 bytes
+ * passed in as argument.
+ * @param bytes 6-byte input array
+ * @return MacAddress with canonical string derived from input bytes
+ * @throws NullPointerException if bytes is null
+ * @throws IllegalArgumentException if length of input is not 6 bytes
+ */
+ public final @NonNull M macAddressFor(final byte @NonNull[] bytes) {
+ checkArgument(bytes.length == MAC_BYTE_LENGTH, "MAC address should have 6 bytes, not %s",
+ bytes.length);
+ return macFactory.newInstance(bytesToString(bytes, 17));
+ }
+
+ /**
+ * Convert the value of a PhysAddress into the canonical representation.
+ *
+ * @param physAddress Input MAC address
+ * @return A PhysAddress containing the canonical representation.
+ * @throws NullPointerException if physAddress is null
+ */
+ public final @NonNull P canonizePhysAddress(final @NonNull P physAddress) {
+ final char[] input = getPhysValue(physAddress).toCharArray();
+ return ensureLowerCase(input) ? physFactory.newInstance(String.valueOf(input)) : physAddress;
+ }
+
+ /**
+ * Create a PhysAddress object holding the canonical representation of the bytes passed in as argument.
+ *
+ * @param bytes input array
+ * @return PhysAddress with canonical string derived from input bytes
+ * @throws NullPointerException if bytes is null
+ * @throws IllegalArgumentException if length of input is not at least 1 byte
+ */
+ public final @NonNull P physAddressFor(final byte @NonNull[] bytes) {
+ checkArgument(bytes.length > 0, "Physical address should have at least one byte");
+ return physFactory.newInstance(bytesToString(bytes, (bytes.length + 1) / 3));
+ }
+
+ public final byte @NonNull[] bytesFor(final @NonNull M macAddress) {
+ final String mac = getValue(macAddress);
+ final byte[] ret = new byte[MAC_BYTE_LENGTH];
+
+ for (int i = 0, base = 0; i < MAC_BYTE_LENGTH; ++i, base += 3) {
+ ret[i] = (byte) (hexValue(mac.charAt(base)) << 4 | hexValue(mac.charAt(base + 1)));
+ }
+
+ return ret;
+ }
+
+ protected abstract String getValue(M macAddress);
+
+ protected abstract String getPhysValue(P physAddress);
+
+ static byte hexValue(final char c) {
+ byte v;
+ try {
+ // Performance optimization: access the array and rely on the VM for catching
+ // illegal access (which boils down to illegal character, which should never happen.
+ v = HEX_VALUES[c];
+ } catch (IndexOutOfBoundsException e) {
+ v = -1;
+ }
+
+ if (v < 0) {
+ throw new IllegalArgumentException("Invalid character '" + c + "' encountered");
+ }
+
+ return v;
}
/**
* @return True if the array has been modified
* @throws NullPointerException if input is null
*/
- private static boolean ensureLowerCase(@Nonnull final char[] chars) {
+ private static boolean ensureLowerCase(final char @NonNull[] chars) {
boolean ret = false;
for (int i = 0; i < chars.length; ++i) {
* lower-case digits each, separated by colons.
*
* @param bytes Input bytes, may not be null
+ * @param charHint Hint at how many characters are needed
* @return Canonical MAC address string
* @throws NullPointerException if input is null
* @throws IllegalArgumentException if length of input is not 6 bytes
*/
- @Nonnull private static String bytesToString(@Nonnull final byte[] bytes) {
- Preconditions.checkArgument(bytes.length == 6, "MAC address should have 6 bytes, not %s", bytes.length);
-
- final StringBuilder sb = new StringBuilder(17);
+ private static @NonNull String bytesToString(final byte @NonNull[] bytes, final int charHint) {
+ final StringBuilder sb = new StringBuilder(charHint);
appendHexByte(sb, bytes[0]);
for (int i = 1; i < bytes.length; ++i) {
- sb.append(':');
- appendHexByte(sb, bytes[i]);
+ appendHexByte(sb.append(':'), bytes[i]);
}
return sb.toString();
}
- /**
- * Convert the value of a MacAddress into the canonical representation.
- *
- * @param macAddress Input MAC address
- * @return A MacAddress containing the canonical representation.
- * @throws NullPointerException if macAddress is null
- */
- @Nonnull public final T canonizeMacAddress(@Nonnull final T macAddress) {
- final char[] input = getValue(macAddress).toCharArray();
- if (ensureLowerCase(input)) {
- return factory.newInstance(input.toString());
- } else {
- return macAddress;
- }
- }
-
- /**
- * Create a MacAddress object holding the canonical representation of the 6 bytes
- * passed in as argument.
- * @param bytes 6-byte input array
- * @return MacAddress with canonical string derived from input bytes
- * @throws NullPointerException if bytes is null
- * @throws IllegalArgumentException if length of input is not 6 bytes
- */
- @Nonnull public final T macAddressFor(@Nonnull final byte[] bytes) {
- return factory.newInstance(bytesToString(bytes));
+ private static final void appendHexByte(final StringBuilder sb, final byte b) {
+ final int v = Byte.toUnsignedInt(b);
+ sb.append(HEX_CHARS[v >>> 4]).append(HEX_CHARS[v & 15]);
}
-
- protected abstract String getValue(T macAddress);
}
Code Review / mdsal.git / blobdiff