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package de.measite.minidns;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import de.measite.minidns.Record.CLASS;
import de.measite.minidns.Record.TYPE;
import de.measite.minidns.util.NameUtil;
public class Question {
private final String name;
private final TYPE type;
private final CLASS clazz;
private byte[] byteArray;
public Question(String name, TYPE type, CLASS clazz) {
this.name = name;
this.type = type;
this.clazz = clazz;
}
public TYPE getType() {
return type;
}
public CLASS getClazz() {
return clazz;
}
public String getName() {
return name;
}
public static Question parse(DataInputStream dis, byte[] data) throws IOException {
String name = NameUtil.parse(dis, data);
TYPE type = TYPE.getType(dis.readUnsignedShort());
CLASS clazz = CLASS.getClass(dis.readUnsignedShort());
return new Question (name, type, clazz);
}
public byte[] toByteArray() {
if (byteArray == null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream(512);
DataOutputStream dos = new DataOutputStream(baos);
try {
dos.write(NameUtil.toByteArray(this.name));
dos.writeShort(type.getValue());
dos.writeShort(clazz.getValue());
dos.flush();
} catch (IOException e) {
// Should never happen
throw new IllegalStateException(e);
}
byteArray = baos.toByteArray();
}
return byteArray;
}
@Override
public int hashCode() {
return toByteArray().hashCode();
}
@Override
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (!(other instanceof Question)) {
return false;
}
return this.hashCode() == other.hashCode();
}
}
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