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BlobCompressionRatio.java
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BlobCompressionRatio.java
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package com.komanov.compression;
import java.nio.charset.StandardCharsets;
import java.util.Random;
public enum BlobCompressionRatio {
LOW_COMPRESSION_1_3 {
public byte[] generateBlob(int length) {
return generateImpl(COMP_1_3, length);
}
},
MEDIUM_COMPRESSION_2_1 {
public byte[] generateBlob(int length) {
return generateImpl(COMP_2_1, length);
}
},
HIGH_COMPRESSION_3_4 {
public byte[] generateBlob(int length) {
return generateImpl(COMP_3_4, length);
}
},
EXTRA_HIGH_COMPRESSION_6_2 {
public byte[] generateBlob(int length) {
return generateImpl(COMP_6_2, length);
}
},
;
public abstract byte[] generateBlob(int length);
private static final Random rnd = new Random();
private static final byte[] COMP_6_2 = "01".getBytes(StandardCharsets.US_ASCII);
private static final byte[] COMP_3_4 = "0123".getBytes(StandardCharsets.US_ASCII);
private static final byte[] COMP_2_1 = "0123456789".getBytes(StandardCharsets.US_ASCII);
private static final byte[] COMP_1_3 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789".getBytes(StandardCharsets.US_ASCII);
private static byte[] generateImpl(byte[] alphabet, int length) {
byte[] result = new byte[length];
for (int i = 0; i < result.length; i++) {
result[i] = alphabet[rnd.nextInt(alphabet.length)];
}
return result;
}
}