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DependencyFinder » com » jeantessier » metrics » MeasurementBase.java
/*
 *  Copyright (c) 2001-2007, Jean Tessier
 *  All rights reserved.
 *  
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  
 *      * Redistributions of source code must retain the above copyright
 *        notice, this list of conditions and the following disclaimer.
 *  
 *      * Redistributions in binary form must reproduce the above copyright
 *        notice, this list of conditions and the following disclaimer in the
 *        documentation and/or other materials provided with the distribution.
 *  
 *      * Neither the name of Jean Tessier nor the names of his contributors
 *        may be used to endorse or promote products derived from this software
 *        without specific prior written permission.
 *  
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jeantessier.metrics;

import org.apache.oro.text.perl.*;

import com.jeantessier.text.*;

public abstract class MeasurementBase implements Measurement {
    private static final Perl5Util perl = new Perl5Util(new MaximumCapacityPatternCache());

    protected static Perl5Util perl() {
        return perl;
    }
    
    private MeasurementDescriptor descriptor = null;
    private Metrics               context    = null;

    private boolean               cached     = false;
    private boolean               empty      = true;

    public MeasurementBase(MeasurementDescriptor descriptor, Metrics context, String initText) {
        this.descriptor = descriptor;
        this.context    = context;
    }
    
    public MeasurementDescriptor getDescriptor() {
        return descriptor;
    }
    
    public Metrics getContext() {
        return context;
    }

    /**
     *  Tells this instance if it should reuse a previously
     *  computed value or if it should regenerate it.
     */
    protected boolean isCached() {
        return cached;
    }

    /**
     *  Sets the caching flag, telling this instance if
     *  its value has been computed.  This flag is
     *  conditional to caching being enabled in the
     *  corresponding descriptor.
     */
    protected void setCached(boolean cached) {
        this.cached = cached && getDescriptor().isCached();
    }

    public boolean isEmpty() {
        return empty;
    }

    protected void setEmpty(boolean empty) {
        this.empty = empty;
    }
    
    public String getShortName() {
        return getDescriptor().getShortName();
    }
    
    public String getLongName() {
        return getDescriptor().getLongName();
    }
    
    public Number getValue() {
        return compute();
    }

    public int intValue() {
        return (int) compute();
    }

    public long longValue() {
        return (long) compute();
    }

    public float floatValue() {
        return (float) compute();
    }

    public double doubleValue() {
        return compute();
    }
    
    public boolean isInRange() {
        boolean result = true;

        if (getDescriptor() != null) {
            Comparable lowerThreshold = getDescriptor().getLowerThreshold();
            Comparable upperThreshold = getDescriptor().getUpperThreshold();

            if (result && lowerThreshold != null) {
                if (lowerThreshold instanceof String) {
                    try {
                        result = Double.parseDouble((String) lowerThreshold) <= compute();
                    } catch (NumberFormatException ex) {
                        // Ignore
                    }
                } else if (lowerThreshold instanceof Number) {
                    result = ((Number) lowerThreshold).doubleValue() <= compute();
                } else {
                    result = lowerThreshold.compareTo(getValue()) <= 0;
                }
            }
            
            if (result && upperThreshold != null) {
                if (upperThreshold instanceof String) {
                    try {
                        result = Double.parseDouble((String) upperThreshold) >= compute();
                    } catch (NumberFormatException ex) {
                        // Ignore
                    }
                } else if (upperThreshold instanceof Number) {
                    result = ((Number) upperThreshold).doubleValue() >= compute();
                } else {
                    result = upperThreshold.compareTo(getValue()) >= 0;
                }
            }
        }
        
        return result;
    }
    
    public void add(Object object) {
        // Do nothing
    }

    public void add(int i) {
        // Do nothing
    }
    
    public void add(long l) {
        // Do nothing
    }
    
    public void add(float f) {
        // Do nothing
    }
    
    public void add(double d) {
        // Do nothing
    }
    
    protected abstract double compute();

    public String toString() {
        return getValue().toString();
    }
}
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