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Support and utility classes used by other JAI-tools components and available for general use.

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/*
 * Copyright 2009-2010 Michael Bedward
 *
 * This file is part of jai-tools.
 *
 * jai-tools 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 3 of the
 * License, or (at your option) any later version.
 *
 * jai-tools 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 jai-tools.  If not, see .
 *
 */

package jaitools.numeric;

import java.util.Collection;
import java.util.List;
import java.util.Map;

/**
 * Defines methods that must be implemented by statistics processors
 * working with {@code StreamingSampleStats}.
 *
 * @see Statistic
 * @see StreamingSampleStats
 *
 * @author Michael Bedward
 * @author Daniele Romagnoli, GeoSolutions S.A.S.
 * @since 1.0
 * @source $URL: https://jai-tools.googlecode.com/svn/tags/1.0.1/utils/src/main/java/jaitools/numeric/Processor.java $
 * @version $Id: Processor.java 1175 2010-04-16 10:59:57Z michael.bedward $
 */
public interface Processor {

    /**
     * Get the {@code Statistics} supported by this processor.
     *
     * @return supported {@code Statistics}
     */
    public Collection getSupported();

    /**
     * Set a {@code Range} of values to exclude from calculations, ie. if a sample
     * value in this range is offered it will be ignored.
     *
     * @param exclude a range of values to exclude
     * @deprecated Please use {@link #addRange(Range, jaitools.numeric.Range.Type))}
     */
    public void addExcludedRange(Range exclude);
    
    /**
     * Set a {@code Range} of values to be considered as NoData. Processors
     * count the number of NoData values offered as samples but exclude them from
     * calculations.
     * 

* NoData ranges take precedence over included / excluded data ranges. * * @param noData a range of values to be excluded */ public void addNoDataRange(Range noData); /** * Convenience method for specifying a single value to be considered as NoData. * * @param noData the value to be treated as NoData * * @see #addNoDataRange(jaitools.numeric.Range) */ public void addNoDataValue(Double noData); /** * Set a {@code Range} of values to exclude from/include in calculations * * @param range a range of values to be checked * @param rangeType the type of range. Note that you can only add range of the same type. * Otherwise, you will get an {@link IllegalArgumentException}. */ public void addRange(Range range, final Range.Type rangeType); /** * Set a {@code Range} of values to exclude/include from calculations, ie. if a sample * value in this range is offered it will be ignored/accepted. The behavior depends * on how the rangesType have been set. * * @param a range of values to be checked */ public void addRange(Range range); /** * Set the {@code Range.Type} of the ranges to be added to the processor. * It is worth to point out that this method can be called only one time in case the rangesType * haven't been specified at construction time and no ranges have been added yet. * * @param rangeType the type of range. */ public void setRangesType(Range.Type rangeType); /** * Get the type of {@code Ranges} being used by this processor. * * @return the rangesType of this processor */ public Range.Type getRangesType (); /** * Retrieve the {@code Ranges} of sample values excluded from calculations. * * @return the excluded {@code Ranges} or an empty list if no exclusions * are defined * @deprecated Please use {@link #getRanges()} */ public List> getExcludedRanges(); /** * Retrieve the {@code Ranges} of sample values to be considered as NoData. * * @return the NoData {@code Ranges} or an empty list if no NoData are defined */ public List> getNoDataRanges(); /** * Retrieve the {@code Ranges} of sample values excluded from/included in calculations. * * @return the {@code Ranges} or an empty list if no ranges are defined */ public List> getRanges(); /** * Test whether a sample value will be excluded from calculations by * the processor. * * @param sample the sample value * * @return true if the sample lies within an excluded {@code Range} set * for this processor; false otherwise * @deprecated Please use {@link #isAccepted} */ public boolean isExcluded(Double sample); /** * Test whether a sample value will be accepted for calculations by * the processor. * * @param sample the sample value * * @return true if the sample is accepted in compliance with the ranges settings. * false otherwise */ public boolean isAccepted(Double sample); /** * Offer a sample value to the processor. * * @param sample the sample value */ public void offer(Double sample); /** * Get the number of samples that have been offered to this processor. * * @return number of samples offered */ public long getNumOffered(); /** * Get the number of samples that have been accepted by this processor * (ie. contributed to the calculations). * * @return number of samples used for calculations */ public long getNumAccepted(); /** * Get the number of NaN samples passed to the processor * * @return number of NaN samples */ public long getNumNaN(); /** * Get the number of NoData samples passed to the processor. This count * includes values in user-specified NoData ranges and Double.NaN values. * * @return number of NoData samples * * @see #addNoDataRange(jaitools.numeric.Range) * @see #addNoDataValue(java.lang.Double) */ public long getNumNoData(); /** * Get the value of the statistic calculated by this processor. * * @param stat the specified statistic * * @return the value of the statistic if it has been calculated or * Double.NaN otherwise * * @throws IllegalArgumentException if {@code stat} is not supported * by this processor */ public Double get(Statistic stat) throws IllegalArgumentException; /** * Get the value of all statistics calculated by this processor. * * @return the calculated statistic(s) */ public Map get(); }





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