48 lines
1.5 KiB
Java
48 lines
1.5 KiB
Java
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package nodomain.freeyourgadget.gadgetbridge.util;
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// http://stackoverflow.com/questions/198431/how-do-you-compare-two-version-strings-in-java
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public class Version implements Comparable<Version> {
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private String version;
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public final String get() {
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return this.version;
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}
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public Version(String version) {
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if(version == null)
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throw new IllegalArgumentException("Version can not be null");
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if(!version.matches("[0-9]+(\\.[0-9]+)*"))
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throw new IllegalArgumentException("Invalid version format");
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this.version = version;
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}
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@Override public int compareTo(Version that) {
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if(that == null)
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return 1;
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String[] thisParts = this.get().split("\\.");
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String[] thatParts = that.get().split("\\.");
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int length = Math.max(thisParts.length, thatParts.length);
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for(int i = 0; i < length; i++) {
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int thisPart = i < thisParts.length ?
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Integer.parseInt(thisParts[i]) : 0;
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int thatPart = i < thatParts.length ?
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Integer.parseInt(thatParts[i]) : 0;
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if(thisPart < thatPart)
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return -1;
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if(thisPart > thatPart)
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return 1;
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}
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return 0;
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}
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@Override public boolean equals(Object that) {
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if(this == that)
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return true;
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if(that == null)
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return false;
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if(this.getClass() != that.getClass())
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return false;
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return this.compareTo((Version) that) == 0;
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}
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}
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