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LibraryId.java
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LibraryId.java
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/**
* Copyright (c) 2011-2015, SpaceToad and the BuildCraft Team
* http://www.mod-buildcraft.com
* <p/>
* BuildCraft is distributed under the terms of the Minecraft Mod Public
* License 1.0, or MMPL. Please check the contents of the license located in
* http://www.mod-buildcraft.com/MMPL-1.0.txt
*/
package buildcraft.core.blueprints;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import org.apache.commons.lang3.ArrayUtils;
import io.netty.buffer.ByteBuf;
import net.minecraft.nbt.NBTTagCompound;
import buildcraft.api.core.ISerializable;
import buildcraft.core.lib.utils.NetworkUtils;
public final class LibraryId implements Comparable<LibraryId>, ISerializable {
public static final char BPT_SEP_CHARACTER = '-';
public byte[] uniqueId;
public String name = "";
public String extension = "tpl";
public String completeId;
public LibraryId() {
}
public void generateUniqueId(byte[] data) {
try {
MessageDigest digest = MessageDigest.getInstance("SHA-256");
byte[] id = digest.digest(data);
uniqueId = id;
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
}
public void write(NBTTagCompound nbt) {
nbt.setByteArray("uniqueBptId", uniqueId);
nbt.setString("name", name);
nbt.setString("extension", extension);
}
public void read(NBTTagCompound nbt) {
uniqueId = nbt.getByteArray("uniqueBptId");
name = nbt.getString("name");
if (nbt.hasKey("kind")) {
extension = nbt.getByte("kind") > 0 ? "bpt" : "tpl";
} else {
extension = nbt.getString("extension");
}
}
@Override
public boolean equals(Object obj) {
if (obj instanceof LibraryId) {
return Arrays.equals(uniqueId, ((LibraryId) obj).uniqueId);
} else {
return false;
}
}
@Override
public int hashCode() {
return Arrays.hashCode(ArrayUtils.addAll(uniqueId, name.getBytes()));
}
public String getCompleteId() {
if (completeId == null) {
if (uniqueId.length > 0) {
completeId = name + BPT_SEP_CHARACTER
+ toString(uniqueId);
} else {
completeId = name;
}
}
return completeId;
}
@Override
public String toString() {
return getCompleteId();
}
private static char toHex(int i) {
if (i < 10) {
return (char) ('0' + i);
} else {
return (char) ('a' - 10 + i);
}
}
private static int fromHex(char c) {
if (c >= '0' && c <= '9') {
return c - '0';
} else {
return c - ('a' - 10);
}
}
@Override
public int compareTo(LibraryId o) {
return getCompleteId().compareTo(o.getCompleteId());
}
public static String toString(byte[] bytes) {
char[] ret = new char[bytes.length * 2];
for (int i = 0; i < bytes.length; i++) {
int val = bytes[i] + 128;
ret[i * 2] = toHex(val >> 4);
ret[i * 2 + 1] = toHex(val & 0xf);
}
return new String(ret);
}
public static byte[] toBytes(String suffix) {
byte[] result = new byte[suffix.length() / 2];
for (int i = 0; i < result.length; ++i) {
result[i] = (byte) ((byte) (fromHex(suffix.charAt(i * 2 + 1)))
+ (byte) (fromHex(suffix.charAt(i * 2)) << 4));
result[i] -= 128;
}
return result;
}
@Override
public void readData(ByteBuf stream) {
uniqueId = NetworkUtils.readByteArray(stream);
name = NetworkUtils.readUTF(stream);
extension = NetworkUtils.readUTF(stream);
}
@Override
public void writeData(ByteBuf stream) {
NetworkUtils.writeByteArray(stream, uniqueId);
NetworkUtils.writeUTF(stream, name);
NetworkUtils.writeUTF(stream, extension);
}
}