Range.java

package org.csstudio.swt.xygraph.linearscale;

/** A value range of 'start' ... 'end' or 'lower' .. 'upper'.
 * 
 *  @author Xihui Chen
 *  @author Kay Kasemir Removed a broken and unused copy-constructor, 'final'
 */
public class Range {
    /** the lower value of range */
    final private double lower;

    /** the upper value of range */
    final private double upper;
    
    /** the range between the upper and lower */
    final private double range;

    /** Initialize with start...end values, sorting them to get lower...upper.
     * 
     * @param start
     *            the start value of range
     * @param end
     *            the end value of range
     */
    public Range(final double start, final double end) {

        lower = start;
        upper = end;
        range =  Math.abs(lower-upper);

    }

    /**If a value in the range or not.
     * @param value
     * @param includeBoundary true if the boundary should be considered.
     * @return true if the value is in the range. Otherwise false.
     */
    public boolean inRange(final double value, final boolean includeBoundary){
    	if(lower <= upper){
	    	if(includeBoundary)
	    		return (value >= lower && value <= upper);
	    	else
	    		return (value > lower && value < upper);
    	}else {
    		if(includeBoundary)
	    		return (value >= upper && value <= lower);
	    	else
	    		return (value > upper && value < lower);
    	}
    		
    }
    
    /**If a value in the range or not. The boundary is included.
     * @param value
     * @return true if the value is in the range. Otherwise false.
     */
    public boolean inRange(final double value){
    	if(lower <= upper)
    		return value >= lower && value <= upper;
    	else
    		return value >= upper && value <= lower;  			
    }
    
    /**
     * If a value is inside the range assuming it it rangeMultiplier times bigger
     * @param value The value to check
     * @param rangeMultiplier The multiplier to apply to the range.
     * @return
     */
    public boolean inExtendedRange(final double value, final double rangeMultiplier) {
    	double extention = range*rangeMultiplier;   	
    	
    	if(lower <= upper)
    		return value >= (lower-extention) && value <= (upper+extention);
    	else
    		return value >= (upper-extention) && value <= (lower+extention);
    }
    
    public boolean isMinBigger(){
    	return lower>upper;
    }

	/**
	 * @return the lower
	 */
	public double getLower() {
		return lower;
	}

	/**
	 * @return the upper
	 */
	public double getUpper() {
		return upper;
	}

	/** {@inheritDoc} */
	@Override
    public boolean equals(final Object obj)
    {   // See "Effective Java" Item 7
	    if (this == obj)
	        return true;
	    if (! (obj instanceof Range))
	        return false;
	    final Range other = (Range) obj;
	    return other.lower == lower  &&  other.upper == upper;
    }

    /** {@inheritDoc} */
    @Override
    public int hashCode()
    {
        // "Effective Java" Item 8: When overriding equals(), also implement hashCode
        int result = (int) Double.doubleToLongBits(lower);
        result = 37*result + (int) Double.doubleToLongBits(upper);
        return result;
    }

    /*
     * @see Object#toString()
     */
    @SuppressWarnings("nls")
    @Override
    public String toString() {
        return "lower=" + lower + ", upper=" + upper;
    }
}