Github user keith-turner commented on a diff in the pull request: https://github.com/apache/accumulo/pull/279#discussion_r127780058 --- Diff: core/src/main/java/org/apache/accumulo/core/client/impl/AbstractId.java --- @@ -0,0 +1,86 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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.apache.accumulo.core.client.impl; + +import static java.nio.charset.StandardCharsets.UTF_8; +import static java.util.Objects.requireNonNull; + +import java.io.Serializable; +import java.util.Objects; + +/** + * An abstract identifier class for comparing equality of identifiers of the same type. + */ +public abstract class AbstractId implements Comparable<AbstractId>, Serializable { + + private static final long serialVersionUID = -155513612834787244L; + private final String canonical; + private Integer hashCode = null; + + protected AbstractId(final String canonical) { + requireNonNull(canonical, "canonical cannot be null"); + this.canonical = canonical; + } + + /** + * The canonical ID + */ + public final String canonicalID() { + return canonical; + } + + public boolean isEmpty() { + return canonical.isEmpty(); + } + + /** + * AbstractID objects are considered equal if, and only if, they are of the same type and have the same canonical identifier. + */ + @Override + public boolean equals(final Object obj) { + return obj != null && Objects.equals(getClass(), obj.getClass()) && Objects.equals(canonicalID(), ((AbstractId) obj).canonicalID()); + } + + @Override + public int hashCode() { + if (hashCode == null) { + hashCode = Objects.hash(canonicalID()); + } + return hashCode; + } + + /** + * Returns a string of the canonical ID + */ + @Override + public String toString() { + return canonical; + } + + /** + * Return a UTF_8 byte[] of the canonical ID. + */ + public final byte[] getUtf8Bytes() { + return canonical.getBytes(UTF_8); --- End diff -- I like `getUtf8()`
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