Example usage for org.apache.lucene.store BufferedIndexInput BufferedIndexInput

Introduction

In this page you can find the example usage for org.apache.lucene.store BufferedIndexInput BufferedIndexInput.

Prototype

public BufferedIndexInput(String resourceDesc) 

Source Link

Usage

From source file:com.nearinfinity.mele.store.db.MeleDirectory.java

License:Apache License

@Override
public IndexInput openInput(final String name) throws IOException {
    if (!fileExists(name)) {
        touchFile(name);//from  w  w  w . ja  va  2s  . c om
    }
    final long fileLength = fileLength(name);
    return new BufferedIndexInput(blockSize / 2) {
        @Override
        public long length() {
            return fileLength;
        }

        @Override
        public void close() throws IOException {

        }

        @Override
        protected void seekInternal(long pos) throws IOException {
        }

        @Override
        protected void readInternal(byte[] b, int off, int len) throws IOException {
            long position = getFilePointer();
            while (len > 0) {
                long blockId = getBlock(position, blockShift);
                int innerPosition = (int) getPosition(position, blockMask);
                byte[] block = store.fetchBlock(name, blockId);
                int length = Math.min(len, block.length - innerPosition);
                System.arraycopy(block, innerPosition, b, off, length);
                position += length;
                len -= length;
                off += length;
            }
        }
    };
}

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