*/
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 java.util.Arrays;
-import javax.annotation.Nonnull;
-import org.opendaylight.yangtools.yang.binding.util.StringValueObjectFactory;
+import java.util.HexFormat;
+import java.util.UUID;
+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, H, Q, U> {
private static final int MAC_BYTE_LENGTH = 6;
- private static final char[] HEX_CHARS = "0123456789abcdef".toCharArray();
- 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);
- }
+ private static final HexFormat COLON_HEXFORMAT = HexFormat.ofDelimiter(":");
+ private static final byte @NonNull[] EMPTY_BYTES = new byte[0];
+
+ private final StringValueObjectFactory<M> macFactory;
+ private final StringValueObjectFactory<P> physFactory;
+ private final StringValueObjectFactory<H> hexFactory;
+ private final StringValueObjectFactory<Q> quadFactory;
+ private final StringValueObjectFactory<U> uuidFactory;
+
+ protected AbstractIetfYangUtil(final Class<M> macClass, final Class<P> physClass, final Class<H> hexClass,
+ final Class<Q> quadClass, final Class<U> uuidClass) {
+ this.macFactory = StringValueObjectFactory.create(macClass, "00:00:00:00:00:00");
+ this.physFactory = StringValueObjectFactory.create(physClass, "00:00");
+ this.hexFactory = StringValueObjectFactory.create(hexClass, "00");
+ this.quadFactory = StringValueObjectFactory.create(quadClass, "0.0.0.0");
+ this.uuidFactory = StringValueObjectFactory.create(uuidClass, "f81d4fae-7dec-11d0-a765-00a0c91e6bf6");
+ }
- HEX_VALUES = b;
+ /**
+ * 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;
}
- private final StringValueObjectFactory<T> factory;
+ /**
+ * 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(COLON_HEXFORMAT.formatHex(bytes));
+ }
- protected AbstractIetfYangUtil(final Class<T> clazz) {
- this.factory = StringValueObjectFactory.create(clazz, "00:00:00:00:00:00");
+ public final byte @NonNull[] macAddressBytes(final @NonNull M macAddress) {
+ return stringToBytes(getValue(macAddress), MAC_BYTE_LENGTH);
}
- 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]);
+ /**
+ * 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(COLON_HEXFORMAT.formatHex(bytes));
+ }
+
+ public final byte @NonNull[] physAddressBytes(final @NonNull P physAddress) {
+ final String str = getPhysValue(physAddress);
+ return str.isEmpty() ? EMPTY_BYTES : stringToBytes(str, str.length() / 3 + 1);
+ }
+
+ public final @NonNull H hexStringFor(final byte @NonNull[] bytes) {
+ checkArgument(bytes.length > 0, "Hex string should have at least one byte");
+ return hexFactory.newInstance(COLON_HEXFORMAT.formatHex(bytes));
+ }
+
+ public final byte @NonNull[] hexStringBytes(final @NonNull H hexString) {
+ final String str = getHexValue(hexString);
+ return stringToBytes(str, str.length() / 3 + 1);
+ }
+
+ public final @NonNull Q dottedQuadFor(final byte @NonNull[] bytes) {
+ checkArgument(bytes.length == 4, "Dotted-quad should have 4 bytes");
+ return quadFactory.newInstance(AbstractIetfInetUtil.addressStringV4(bytes));
+ }
+
+ public final @NonNull Q dottedQuadFor(final int bits) {
+ return quadFactory.newInstance(Ipv4Utils.addressString(bits));
+ }
+
+ public final int dottedQuadBits(final @NonNull Q dottedQuad) {
+ final String str = getQuadValue(dottedQuad);
+ return Ipv4Utils.addressBits(str, str.length());
+ }
+
+ public final byte @NonNull[] dottedQuadBytes(final @NonNull Q dottedQuad) {
+ final String str = getQuadValue(dottedQuad);
+ return Ipv4Utils.addressBytes(str, str.length());
+ }
+
+ public final @NonNull U uuidFor(final @NonNull UUID uuid) {
+ return uuidFactory.newInstance(uuid.toString());
+ }
+
+ protected abstract String getValue(M macAddress);
+
+ protected abstract String getPhysValue(P physAddress);
+
+ protected abstract String getHexValue(H hexString);
+
+ protected abstract String getQuadValue(Q dottedQuad);
+
/**
* Make sure an array of characters does not include capital letters. This method assumes input conforms to
* MAC address format, e.g. it is composed of 6 groups of hexadecimal digits separated by colons. Behavior is
* @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) {
final char c = chars[i];
if (c >= 'A' && c <= 'F') {
- chars[i] = Character.toLowerCase(c);
+ // Weird notation to ensure constant folding to '(char) (c + 32)', a well-known property of ASCII
+ chars[i] = (char) (c + ('a' - 'A'));
ret = true;
}
}
return ret;
}
- /**
- * Convert an array of 6 bytes into canonical MAC address representation, that is 6 groups of two hexadecimal
- * lower-case digits each, separated by colons.
- *
- * @param bytes Input bytes, may not be null
- * @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 == MAC_BYTE_LENGTH, "MAC address should have 6 bytes, not %s",
- bytes.length);
-
- final StringBuilder sb = new StringBuilder(17);
- appendHexByte(sb, bytes[0]);
- for (int i = 1; i < MAC_BYTE_LENGTH; ++i) {
- sb.append(':');
- appendHexByte(sb, 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));
- }
-
- 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;
- }
-
- @Nonnull public final byte[] bytesFor(@Nonnull final T 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)));
+ private static byte @NonNull[] stringToBytes(final String str, final int length) {
+ final byte[] ret = new byte[length];
+ for (int i = 0, base = 0; i < length; ++i, base += 3) {
+ ret[i] = (byte) ((HexFormat.fromHexDigit(str.charAt(base)) << 4)
+ + HexFormat.fromHexDigit(str.charAt(base + 1)));
}
-
return ret;
}
-
- protected abstract String getValue(T macAddress);
}
Code Review / mdsal.git / blobdiff