public boolean load()

in activeio-core/src/main/java/org/apache/activeio/journal/active/ControlFile.java [106:142]

• 32 lines of code
• 4 McCabe index (conditional complexity)

    public boolean load() throws IOException {
        long l = file.length();
        if( l < controlData.capacity() ) {
            controlDataVersion=0;
            controlData.position(0);
            controlData.limit(0);
            return false;
        } else {            
            file.seek(0);
            long v1 = file.readLong();
            file.seek(controlData.capacity()+8);
            long v1check = file.readLong();
            
            file.seek(controlData.capacity()+16);
            long v2 = file.readLong();
            file.seek((controlData.capacity()*2)+24);
            long v2check = file.readLong();
            
            if( v2 == v2check ) {
                controlDataVersion = v2;
                file.seek(controlData.capacity()+24);
                controlData.clear();
                channel.read(controlData.getByteBuffer());
            } else if ( v1 == v1check ){
                controlDataVersion = v1;
                file.seek(controlData.capacity()+8);
                controlData.clear();
                channel.read(controlData.getByteBuffer());
            } else {
                // Bummer.. Both checks are screwed. we don't know
                // if any of the two buffer are ok.  This should
                // only happen is data got corrupted.
                throw new IOException("Control data corrupted.");
            }         
            return true;
        }
    }