package org.rrd4j.core.jrrd;
import java.io.IOException;
import java.io.PrintStream;
/**
* 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: 1.1 $
*/
public class CDPStatusBlock {
private static enum cdp_par_en {
CDP_val, CDP_unkn_pdp_cnt, CDP_hw_intercept, CDP_hw_last_intercept, CDP_hw_slope,
CDP_hw_last_slope, CDP_null_count,
CDP_last_null_count, CDP_primary_val, CDP_secondary_val
}
/** Byte offset within file */
final long offset;
/** Size of block in bytes */
final long size;
final int unknownDatapoints;
final double value;
final double secondary_value;
final double primary_value;
CDPStatusBlock(RRDFile file) throws IOException {
//Should read MAX_CDP_PAR_EN = 10
//Size should be 0x50
offset = file.getFilePointer();
UnivalArray scratch = file.getUnivalArray(10);
value = scratch.getDouble(cdp_par_en.CDP_val);
unknownDatapoints = (int) scratch.getDouble(cdp_par_en.CDP_unkn_pdp_cnt);
primary_value = scratch.getDouble(cdp_par_en.CDP_primary_val);
secondary_value = scratch.getDouble(cdp_par_en.CDP_secondary_val);
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() {
StringBuilder sb = new StringBuilder("[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(", primaryValue=");
sb.append(primary_value);
sb.append(", secondaryValue=");
sb.append(secondary_value);
sb.append("]");
return sb.toString();
}
}