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_TestHelper.javaAPI DocApache Lucene 1.4.31561Mon Oct 13 16:31:38 BST 2003org.apache.lucene.store

_TestHelper

public class _TestHelper extends Object
This class provides access to package-level features defined in the store package. It is used for testing only.

Fields Summary
Constructors Summary
Methods Summary
public static booleanisFSInputStream(InputStream is)
Returns true if the instance of the provided input stream is actually an FSInputStream.

        return is instanceof FSInputStream;
public static booleanisFSInputStreamClone(InputStream is)
Returns true if the provided input stream is an FSInputStream and is a clone, that is it does not own its underlying file descriptor.

        if (isFSInputStream(is)) {
            return ((FSInputStream) is).isClone;
        } else {
            return false;
        }
public static booleanisFSInputStreamOpen(InputStream is)
Given an instance of FSDirectory.FSInputStream, this method returns true if the underlying file descriptor is valid, and false otherwise. This can be used to determine if the OS file has been closed. The descriptor becomes invalid when the non-clone instance of the FSInputStream that owns this descriptor is closed. However, the descriptor may possibly become invalid in other ways as well.

        if (isFSInputStream(is)) {
            FSInputStream fis = (FSInputStream) is;
            return fis.isFDValid();
        } else {
            return false;
        }