package org.rrd4j.core.jrrd;
import java.io.IOException;
/**
* Instances of this class model the primary data point status from an RRD file.
*
* @author <a href="mailto:ciaran@codeloop.com">Ciaran Treanor</a>
* @version $Revision: 1.1 $
*/
public class PDPStatusBlock {
private long offset;
private long size;
String lastReading;
int unknownSeconds;
double value;
private static enum pdp_par_en {PDP_unkn_sec_cnt, PDP_val};
PDPStatusBlock(RRDFile file) throws IOException {
offset = file.getFilePointer();
lastReading = file.readString(Constants.LAST_DS_LEN);
UnivalArray scratch = file.getUnivalArray(10);
unknownSeconds = (int) scratch.getLong(pdp_par_en.PDP_unkn_sec_cnt);
value = scratch.getDouble(pdp_par_en.PDP_val);
size = file.getFilePointer() - offset;
}
/**
* Returns the last reading from the data source.
*
* @return the last reading from the data source.
*/
public String getLastReading() {
return lastReading;
}
/**
* Returns the current value of the primary data point.
*
* @return the current value of the primary data point.
*/
public double getValue() {
return value;
}
/**
* Returns the number of seconds of the current primary data point is
* unknown data.
*
* @return the number of seconds of the current primary data point is unknown data.
*/
public int getUnknownSeconds() {
return unknownSeconds;
}
/**
* Returns a summary the contents of this PDP status block.
*
* @return a summary of the information contained in this PDP status block.
*/
public String toString() {
StringBuilder sb = new StringBuilder("[PDPStatus: OFFSET=0x");
sb.append(Long.toHexString(offset));
sb.append(", SIZE=0x");
sb.append(Long.toHexString(size));
sb.append(", lastReading=");
sb.append(lastReading);
sb.append(", unknownSeconds=");
sb.append(unknownSeconds);
sb.append(", value=");
sb.append(value);
sb.append("]");
return sb.toString();
}
}