| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * 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 org.onosproject.bgpio.types; |
| |
| import java.util.Objects; |
| |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.onosproject.bgpio.exceptions.BGPParseException; |
| import org.onosproject.bgpio.util.Constants; |
| import org.onosproject.bgpio.util.Validation; |
| |
| import com.google.common.base.MoreObjects; |
| |
| /** |
| * Provides implementation of LocalPref BGP Path Attribute. |
| */ |
| public class LocalPref implements BGPValueType { |
| public static final byte LOCAL_PREF_TYPE = 5; |
| public static final byte LOCAL_PREF_MAX_LEN = 4; |
| |
| private int localPref; |
| |
| /** |
| * Constructor to initialize LocalPref. |
| * |
| * @param localPref local preference |
| */ |
| public LocalPref(int localPref) { |
| this.localPref = localPref; |
| } |
| |
| /** |
| * Returns local preference value. |
| * |
| * @return local preference value |
| */ |
| public int localPref() { |
| return this.localPref; |
| } |
| |
| /** |
| * Reads the channel buffer and returns object of LocalPref. |
| * |
| * @param cb channelBuffer |
| * @return object of LocalPref |
| * @throws BGPParseException while parsing localPref attribute |
| */ |
| public static LocalPref read(ChannelBuffer cb) throws BGPParseException { |
| int localPref; |
| ChannelBuffer tempCb = cb.copy(); |
| Validation parseFlags = Validation.parseAttributeHeader(cb); |
| if ((parseFlags.getLength() > LOCAL_PREF_MAX_LEN) || cb.readableBytes() < parseFlags.getLength()) { |
| Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR, BGPErrorType.ATTRIBUTE_LENGTH_ERROR, |
| parseFlags.getLength()); |
| } |
| |
| int len = parseFlags.isShort() ? parseFlags.getLength() + |
| Constants.TYPE_AND_LEN_AS_SHORT : parseFlags.getLength() + Constants.TYPE_AND_LEN_AS_BYTE; |
| ChannelBuffer data = tempCb.readBytes(len); |
| if (parseFlags.getFirstBit()) { |
| throw new BGPParseException(BGPErrorType.UPDATE_MESSAGE_ERROR, BGPErrorType.ATTRIBUTE_FLAGS_ERROR, data); |
| } |
| |
| localPref = cb.readInt(); |
| return new LocalPref(localPref); |
| } |
| |
| @Override |
| public short getType() { |
| return LOCAL_PREF_TYPE; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(localPref); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof LocalPref) { |
| LocalPref other = (LocalPref) obj; |
| return Objects.equals(localPref, other.localPref); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("localPref", localPref) |
| .toString(); |
| } |
| |
| @Override |
| public int write(ChannelBuffer cb) { |
| //Not to implement as of now |
| return 0; |
| } |
| } |