| /** |
| * 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.atlas.model.notification; |
| |
| import com.fasterxml.jackson.annotation.JsonAutoDetect; |
| import com.fasterxml.jackson.annotation.JsonIgnoreProperties; |
| import com.fasterxml.jackson.databind.annotation.JsonSerialize; |
| |
| import javax.xml.bind.annotation.XmlAccessType; |
| import javax.xml.bind.annotation.XmlAccessorType; |
| import javax.xml.bind.annotation.XmlRootElement; |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| |
| import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.NONE; |
| import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.PUBLIC_ONLY; |
| |
| /** |
| * Represents the version of a notification message. |
| */ |
| @JsonAutoDetect(getterVisibility=PUBLIC_ONLY, setterVisibility=PUBLIC_ONLY, fieldVisibility=NONE) |
| @JsonSerialize(include=JsonSerialize.Inclusion.NON_NULL) |
| @JsonIgnoreProperties(ignoreUnknown=true) |
| @XmlRootElement |
| @XmlAccessorType(XmlAccessType.PROPERTY) |
| public class MessageVersion implements Comparable<MessageVersion>, Serializable { |
| private static final long serialVersionUID = 1L; |
| |
| /** |
| * Used for message with no version (old format). |
| */ |
| public static final MessageVersion NO_VERSION = new MessageVersion("0"); |
| public static final MessageVersion VERSION_1 = new MessageVersion("1.0.0"); |
| |
| public static final MessageVersion CURRENT_VERSION = VERSION_1; |
| |
| private String version; |
| |
| |
| // ----- Constructors ---------------------------------------------------- |
| public MessageVersion() { |
| this.version = CURRENT_VERSION.version; |
| } |
| |
| /** |
| * Create a message version. |
| * |
| * @param version the version string |
| */ |
| public MessageVersion(String version) { |
| this.version = version; |
| |
| try { |
| getVersionParts(); |
| } catch (NumberFormatException e) { |
| throw new IllegalArgumentException(String.format("Invalid version string : %s.", version), e); |
| } |
| } |
| |
| public String getVersion() { |
| return version; |
| } |
| |
| public void setVersion(String version) { |
| this.version = version; |
| } |
| |
| |
| // ----- Comparable ------------------------------------------------------ |
| |
| @Override |
| public int compareTo(MessageVersion that) { |
| if (that == null) { |
| return 1; |
| } |
| |
| Integer[] thisParts = getVersionParts(); |
| Integer[] thatParts = that.getVersionParts(); |
| |
| int length = Math.max(thisParts.length, thatParts.length); |
| |
| for (int i = 0; i < length; i++) { |
| |
| int comp = getVersionPart(thisParts, i) - getVersionPart(thatParts, i); |
| |
| if (comp != 0) { |
| return comp; |
| } |
| } |
| return 0; |
| } |
| |
| |
| // ----- Object overrides ------------------------------------------------ |
| |
| @Override |
| public boolean equals(Object that) { |
| if (this == that){ |
| return true; |
| } |
| |
| if (that == null || getClass() != that.getClass()) { |
| return false; |
| } |
| |
| return compareTo((MessageVersion) that) == 0; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Arrays.hashCode(getVersionParts()); |
| } |
| |
| |
| @Override |
| public String toString() { |
| return "MessageVersion[version=" + version + "]"; |
| } |
| |
| // ----- helper methods -------------------------------------------------- |
| |
| /** |
| * Get the version parts array by splitting the version string. |
| * Strip the trailing zeros (i.e. '1.0.0' equals '1'). |
| * |
| * @return the version parts array |
| */ |
| public Integer[] getVersionParts() { |
| |
| String[] sParts = version.split("\\."); |
| ArrayList<Integer> iParts = new ArrayList<>(); |
| int trailingZeros = 0; |
| |
| for (String sPart : sParts) { |
| Integer iPart = new Integer(sPart); |
| |
| if (iPart == 0) { |
| ++trailingZeros; |
| } else { |
| for (int i = 0; i < trailingZeros; ++i) { |
| iParts.add(0); |
| } |
| trailingZeros = 0; |
| iParts.add(iPart); |
| } |
| } |
| return iParts.toArray(new Integer[iParts.size()]); |
| } |
| |
| public Integer getVersionPart(Integer[] versionParts, int i) { |
| return i < versionParts.length ? versionParts[i] : 0; |
| } |
| } |