| /* |
| * 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.nifi.processor; |
| |
| /** |
| * An immutable object for holding information about a type of relationship. |
| * |
| */ |
| public final class Relationship implements Comparable<Relationship> { |
| |
| public static final Relationship SELF = new Relationship.Builder().build(); |
| public static final Relationship ANONYMOUS = new Relationship.Builder().name("").build(); |
| |
| /** |
| * The proper name of the relationship. Determines the relationship |
| * 'identity' |
| */ |
| private final String name; |
| /** |
| * A user displayable description of the purpose of this relationship. |
| */ |
| private final String description; |
| |
| /** |
| * The hash code, which is computed in the constructor because it is hashed |
| * very frequently and the hash code is constant |
| */ |
| private final int hashCode; |
| |
| /** |
| * The flag which tells the controller to auto terminate this |
| * relationship, so that the processor can be run even if it does |
| * not have connections from this relationship |
| */ |
| private final boolean isAutoTerminate; |
| |
| protected Relationship(final Builder builder) { |
| this.name = builder.name == null ? null : builder.name.intern(); |
| this.description = builder.description; |
| this.isAutoTerminate = builder.autoTerminate; |
| this.hashCode = 301 + ( (name == null) ? 0 :this.name.hashCode() ); // compute only once, since it gets called a bunch and will never change |
| } |
| |
| @Override |
| public int compareTo(final Relationship o) { |
| if (o == null) { |
| return -1; |
| } |
| final String thisName = getName(); |
| final String thatName = o.getName(); |
| if (thisName == null && thatName == null) { |
| return 0; |
| } |
| if (thisName == null) { |
| return 1; |
| } |
| if (thatName == null) { |
| return -1; |
| } |
| |
| return thisName.compareTo(thatName); |
| } |
| |
| public static final class Builder { |
| |
| private String name = ""; |
| private String description = ""; |
| private boolean autoTerminate = false; |
| |
| public Builder name(final String name) { |
| if (null != name) { |
| this.name = name; |
| } |
| return this; |
| } |
| |
| public Builder description(final String description) { |
| if (null != description) { |
| this.description = description; |
| } |
| return this; |
| } |
| |
| public Builder autoTerminateDefault(boolean autoTerminate) { |
| this.autoTerminate = autoTerminate; |
| return this; |
| } |
| |
| public Relationship build() { |
| return new Relationship(this); |
| } |
| } |
| |
| public String getName() { |
| return this.name; |
| } |
| |
| public String getDescription() { |
| return this.description; |
| } |
| |
| public boolean isAutoTerminated() { |
| return this.isAutoTerminate; |
| } |
| |
| @Override |
| public boolean equals(final Object other) { |
| if (other == null) { |
| return false; |
| } |
| if (!(other instanceof Relationship)) { |
| return false; |
| } |
| if (this == other) { |
| return true; |
| } |
| Relationship desc = (Relationship) other; |
| return this.name.equals(desc.name); |
| } |
| |
| @Override |
| public int hashCode() { |
| return hashCode; |
| } |
| |
| @Override |
| public String toString() { |
| return this.name; |
| } |
| } |