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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.statistics;
import java.util.List;
import java.util.ArrayList;
/**
* Limits for a histogram, this is only a wrapper for initializing
* a histogram.
*
* @author <a href="mailto:steinar@yahoo-inc.com">Steinar Knutsen</a>
*/
public class Limits {
private final List<Axis> axes = new ArrayList<>(1);
private boolean frozen = false;
/**
* Create an empty Limits instance.
*/
public Limits() {
}
/**
* Create a Limits instance suitable for use in a Value.Parameters instance.
* The instance will be frozen.
*/
public Limits(double[] limits) {
addAxis(null, limits);
freeze();
}
/**
* @param name the name of the variable for this axis
* @param limits the bucket limits for this axis
*/
public void addAxis(String name, double[] limits) {
if (frozen) {
throw new IllegalStateException("Can not add more axes to a frozen Limits instance.");
}
axes.add(new Axis(name, limits));
}
int getDimensions() {
return axes.size();
}
Axis getAxis(int i) {
return axes.get(i);
}
/**
* Prevent adding any mores axes.
*/
public void freeze() {
this.frozen = true;
}
/**
* True if further change is not permitted.
*
* @return whether this object now should be considered immutable
*/
public boolean isFrozen() {
return frozen;
}
}
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