/*******************************************************************************
* Copyright (c) 2001-2005 Sasa Markovic and Ciaran Treanor.
* Copyright (c) 2011 The OpenNMS Group, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*******************************************************************************/
package org.jrobin.core.jrrd;
import java.io.IOException;
import java.io.PrintStream;
import org.jrobin.core.RrdException;
/**
* Instances of this class model the consolidation data point status from an RRD file.
*
* @author <a href="mailto:ciaran@codeloop.com">Ciaran Treanor</a>
* @version $Revision$
*/
public class CDPStatusBlock {
long offset;
long size;
int unknownDatapoints;
double value;
CDPStatusBlock(RRDFile file) throws IOException, RrdException {
offset = file.getFilePointer();
value = file.readDouble();
unknownDatapoints = file.readInt();
file.align(8);
// Skip rest of cdp_prep_t.scratch
file.skipBytes(64);
size = file.getFilePointer() - offset;
}
/**
* Returns the number of unknown primary data points that were integrated.
*
* @return the number of unknown primary data points that were integrated.
*/
public int getUnknownDatapoints() {
return unknownDatapoints;
}
/**
* Returns the value of this consolidated data point.
*
* @return the value of this consolidated data point.
*/
public double getValue() {
return value;
}
void toXml(PrintStream s) {
s.print("\t\t\t<ds><value> ");
s.print(value);
s.print(" </value> <unknown_datapoints> ");
s.print(unknownDatapoints);
s.println(" </unknown_datapoints></ds>");
}
/**
* Returns a summary the contents of this CDP status block.
*
* @return a summary of the information contained in the CDP status block.
*/
public String toString() {
StringBuffer sb = new StringBuffer("[CDPStatusBlock: OFFSET=0x");
sb.append(Long.toHexString(offset));
sb.append(", SIZE=0x");
sb.append(Long.toHexString(size));
sb.append(", unknownDatapoints=");
sb.append(unknownDatapoints);
sb.append(", value=");
sb.append(value);
sb.append("]");
return sb.toString();
}
}