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package org.eclipse.net4j.internal.util.om.monitor;
import org.eclipse.net4j.util.om.monitor.MONITOR;
/**
* @author Eike Stepper
*/
public abstract class Monitor
{
private static final int UNINITIALIZED = 0;
private int totalWork = UNINITIALIZED;
private int work;
private String task;
public Monitor()
{
}
public final String getTask()
{
return task;
}
public final void setTask(String task, int level)
{
this.task = task;
message(task, level);
}
public int getTotalWork()
{
return totalWork;
}
public void begin(int totalWork, String task, int level)
{
if (this.totalWork != UNINITIALIZED)
{
throw new IllegalStateException("Monitoring has already begun");
}
this.totalWork = totalWork;
if (task != null)
{
setTask(task, level);
}
}
public void worked(int work, String msg, int level)
{
if (this.totalWork == UNINITIALIZED)
{
throw new IllegalStateException("Monitoring has not yet begun");
}
this.work += work;
if (totalWork != MONITOR.UNKNOWN && this.work > totalWork)
{
throw new IllegalStateException("Work has exceeded total work");
}
if (msg != null)
{
message(msg, level);
}
}
public abstract void message(String msg, int level);
public abstract SubMonitor newSubMonitor(int workFromParent);
}
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