com.sun.mail.iap.ByteArray Maven / Gradle / Ivy
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/*
* @(#)ByteArray.java 1.7 07/05/04
*/
package com.sun.mail.iap;
import java.io.ByteArrayInputStream;
/**
* A simple wrapper around a byte array, with a start position and
* count of bytes.
*
* @version 1.7, 07/05/04
* @author John Mani
*/
public class ByteArray {
private byte[] bytes; // the byte array
private int start; // start position
private int count; // count of bytes
/**
* Constructor
*/
public ByteArray(byte[] b, int start, int count) {
bytes = b;
this.start = start;
this.count = count;
}
/**
* Constructor that creates a byte array of the specified size.
*
* @since JavaMail 1.4.1
*/
public ByteArray(int size) {
this(new byte[size], 0, size);
}
/**
* Returns the internal byte array. Note that this is a live
* reference to the actual data, not a copy.
*/
public byte[] getBytes() {
return bytes;
}
/**
* Returns a new byte array that is a copy of the data.
*/
public byte[] getNewBytes() {
byte[] b = new byte[count];
System.arraycopy(bytes, start, b, 0, count);
return b;
}
/**
* Returns the start position
*/
public int getStart() {
return start;
}
/**
* Returns the count of bytes
*/
public int getCount() {
return count;
}
/**
* Set the count of bytes.
*
* @since JavaMail 1.4.1
*/
public void setCount(int count) {
this.count = count;
}
/**
* Returns a ByteArrayInputStream.
*/
public ByteArrayInputStream toByteArrayInputStream() {
return new ByteArrayInputStream(bytes, start, count);
}
/**
* Grow the byte array by incr bytes.
*
* @since JavaMail 1.4.1
*/
public void grow(int incr) {
byte[] nbuf = new byte[bytes.length + incr];
System.arraycopy(bytes, 0, nbuf, 0, bytes.length);
bytes = nbuf;
}
}