package org.apache.poi.hwpf.model;
+import java.util.Arrays;
+
import org.apache.poi.util.Internal;
+/**
+ * A data structure used to hold some data we don't
+ * understand / can't handle, so we have it available
+ * for when we come to write back out again
+ */
@Internal
public final class UnhandledDataStructure
{
public UnhandledDataStructure(byte[] buf, int offset, int length)
{
-// System.out.println("Yes, using my code");
- _buf = new byte[length];
+ // Sanity check the size they've asked for
if (offset + length > buf.length)
{
- throw new IndexOutOfBoundsException("buffer length is " + buf.length +
- "but code is trying to read " + length + " from offset " + offset);
+ throw new IndexOutOfBoundsException("Buffer Length is " + buf.length + " " +
+ "but code is tried to read " + length + " from offset " + offset);
+ }
+ if (offset < 0 || length < 0)
+ {
+ throw new IndexOutOfBoundsException("Offset and Length must both be >= 0, negative " +
+ "indicies are not permitted - code is tried to read " + length + " from offset " + offset);
}
- System.arraycopy(buf, offset, _buf, 0, length);
+
+ // Save that requested portion of the data
+ _buf = Arrays.copyOfRange(buf, offset, offset + length);
}
byte[] getBuf()