diff --git a/src/main/java/com/sparrowwallet/drongo/Version.java b/src/main/java/com/sparrowwallet/drongo/Version.java new file mode 100644 index 0000000..193103c --- /dev/null +++ b/src/main/java/com/sparrowwallet/drongo/Version.java @@ -0,0 +1,54 @@ +package com.sparrowwallet.drongo; + +public class Version implements Comparable { + private final String version; + + public final String get() { + return this.version; + } + + public Version(String version) { + if(version == null) { + throw new IllegalArgumentException("Version can not be null"); + } + if(!version.matches("[0-9]+(\\.[0-9]+)*")) { + throw new IllegalArgumentException("Invalid version format"); + } + this.version = version; + } + + @Override + public int compareTo(Version that) { + if(that == null) { + return 1; + } + String[] thisParts = this.get().split("\\."); + String[] thatParts = that.get().split("\\."); + int length = Math.max(thisParts.length, thatParts.length); + for(int i = 0; i < length; i++) { + int thisPart = i < thisParts.length ? Integer.parseInt(thisParts[i]) : 0; + int thatPart = i < thatParts.length ? Integer.parseInt(thatParts[i]) : 0; + if(thisPart < thatPart) { + return -1; + } + if(thisPart > thatPart) { + return 1; + } + } + return 0; + } + + @Override + public boolean equals(Object that) { + if(this == that) { + return true; + } + if(that == null) { + return false; + } + if(this.getClass() != that.getClass()) { + return false; + } + return this.compareTo((Version) that) == 0; + } +}