| /* |
| * Copyright 2014-present 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.net; |
| |
| import com.google.common.annotations.Beta; |
| import com.google.common.hash.HashFunction; |
| import com.google.common.hash.Hashing; |
| import org.onlab.util.Identifier; |
| import org.onosproject.net.resource.ResourceConsumer; |
| import org.onosproject.net.resource.ResourceConsumerId; |
| |
| import java.nio.charset.StandardCharsets; |
| |
| /** |
| * Intent identifier suitable as an external key. |
| * <p>This class is immutable.</p> |
| */ |
| @Beta |
| public final class ResourceGroup extends Identifier<Long> implements ResourceConsumer { |
| |
| private static final String HEX_PREFIX = "0x"; |
| private static final HashFunction HASH_FN = Hashing.md5(); |
| |
| /** |
| * Creates a resource group identifier from the specified long |
| * representation. |
| * |
| * @param value long value |
| * @return resource group identifier |
| */ |
| public static ResourceGroup of(long value) { |
| return new ResourceGroup(value); |
| } |
| |
| /** |
| * Creates a resource group identifier from the specified string |
| * representation. |
| * Warning: it is caller responsibility to make sure the hashed value of |
| * {@code value} is unique. |
| * |
| * @param value string value |
| * @return resource group identifier |
| */ |
| public static ResourceGroup of(String value) { |
| return new ResourceGroup(HASH_FN.newHasher() |
| .putString(value, StandardCharsets.UTF_8) |
| .hash() |
| .asLong()); |
| } |
| |
| /** |
| * Constructor for serializer. |
| */ |
| protected ResourceGroup() { |
| super(0L); |
| } |
| |
| /** |
| * Constructs the ID corresponding to a given long value. |
| * |
| * @param value the underlying value of this ID |
| */ |
| protected ResourceGroup(long value) { |
| super(value); |
| } |
| |
| /** |
| * Returns the backing value. |
| * |
| * @return the value |
| */ |
| public long fingerprint() { |
| return identifier; |
| } |
| |
| @Override |
| public String toString() { |
| return HEX_PREFIX + Long.toHexString(identifier); |
| } |
| |
| @Override |
| public ResourceConsumerId consumerId() { |
| return ResourceConsumerId.of(this); |
| } |
| |
| @Override |
| public int hashCode() { |
| return super.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null || getClass() != obj.getClass()) { |
| return false; |
| } |
| final ResourceGroup other = (ResourceGroup) obj; |
| if (this.fingerprint() != other.fingerprint()) { |
| return false; |
| } |
| return true; |
| } |
| } |