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Code polish. Changed ByteArrayWrapper to static access, so the construction is very clear

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This commit is contained in:
nathan 2014-08-26 14:24:31 +02:00
parent e6ab2bef0e
commit 010c21ecf3
1 changed files with 31 additions and 4 deletions
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35
Dorkbox-Util/src/dorkbox/util/bytes/ByteArrayWrapper.java
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@ -8,14 +8,41 @@ import java.util.Arrays;
public final class ByteArrayWrapper {
private final byte[] data;
public ByteArrayWrapper(byte[] data) {
/**
* Makes a safe copy of the byte array, so that changes to the original do not affect the wrapper.
* Side affect is additional memory is used.
*/
public static ByteArrayWrapper copy(byte[] data) {
return new ByteArrayWrapper(data, true);
}
/**
* Does not make a copy of the data, so changes to the original will also affect the wrapper.
* Side affect is no extra memory is needed.
*/
public static ByteArrayWrapper noCopy(byte[] data) {
return new ByteArrayWrapper(data, false);
}
/**
* Permits the re-use of a byte array.
* @param copyBytes if TRUE, then the byteArray is copies. if FALSE, the byte array is uses as-is.
* Using FALSE IS DANGEROUS!!!! If the underlying byte array is modified, this changes as well.
*/
private ByteArrayWrapper(byte[] data, boolean copyBytes) {
if (data == null) {
throw new NullPointerException();
}
int length = data.length;
this.data = new byte[length];
// copy so it's immutable as a key.
System.arraycopy(data, 0, this.data, 0, length);
if (copyBytes) {
this.data = new byte[length];
// copy so it's immutable as a key.
System.arraycopy(data, 0, this.data, 0, length);
} else {
this.data = data;
}
}
public byte[] getBytes() {