File src/de/openrat/client/Version.java

Last commit: Fri Nov 8 13:36:19 2019 +0100	Jan Dankert	Make the API client more simple with a fluent interface.


     1 package de.openrat.client;
     2 
     3 /**
     4  * Checking and comparing versions.
     5  *
     6  * @source https://stackoverflow.com/questions/198431/how-do-you-compare-two-version-strings-in-java
     7  */
     8 public class Version implements Comparable<Version> {
     9 
    10 	private String version;
    11 
    12 	public final String get() {
    13 		return this.version;
    14 	}
    15 
    16 	public Version(String version) {
    17 		if (version == null)
    18 			throw new IllegalArgumentException("Version can not be null");
    19 		if (!version.matches("[0-9]+(\\.[0-9]+)*"))
    20 			throw new IllegalArgumentException("Invalid version format");
    21 		this.version = version;
    22 	}
    23 
    24 	@Override
    25 	public int compareTo(Version that) {
    26 		if (that == null)
    27 			return 1;
    28 		String[] thisParts = this.get().split("\\.");
    29 		String[] thatParts = that.get().split("\\.");
    30 		int length = Math.max(thisParts.length, thatParts.length);
    31 		for (int i = 0; i < length; i++) {
    32 			int thisPart = i < thisParts.length ?
    33 					Integer.parseInt(thisParts[i]) : 0;
    34 			int thatPart = i < thatParts.length ?
    35 					Integer.parseInt(thatParts[i]) : 0;
    36 			if (thisPart < thatPart)
    37 				return -1;
    38 			if (thisPart > thatPart)
    39 				return 1;
    40 		}
    41 		return 0;
    42 	}
    43 
    44 	@Override
    45 	public boolean equals(Object that) {
    46 		if (this == that)
    47 			return true;
    48 		if (that == null)
    49 			return false;
    50 		if (this.getClass() != that.getClass())
    51 			return false;
    52 		return this.compareTo((Version) that) == 0;
    53 	}
    54 
    55 
    56 	@Override
    57 	public String toString() {
    58 		return "version:" + get();
    59 	}
    60 }
    61 



Download src/de/openrat/client/Version.java


History
Fri, 8 Nov 2019 13:36:19 +0100	Jan Dankert	Make the API client more simple with a fluent interface.
Thu, 7 Nov 2019 17:03:39 +0100	Jan Dankert	Compare versions with special versions object.