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/*******************************************************************************
* Copyright (c) 2005, 2013 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.internal;
import java.io.Serializable;
/**
* This simple container class simply puts a bit of semantics
* around a pair of numbers.
* <p>
* <strong>NB:</strong> The {@link #start} will be less than (or equal to)
* the {@link #end}.
*/
public class Range
implements Cloneable, Serializable
{
/**
* The range's starting index. This will always be less than or equal to
* {@link #end the range's ending index}.
*/
public final int start;
/**
* The range's ending index. This will always be greater than or equal to
* {@link #start the range's starting index}.
*/
public final int end;
/**
* The range's length. The range's length will never be negative.
*/
public final int length;
private static final long serialVersionUID = 1L;
/**
* Construct a range with the specified start and end, both of which are
* mmutable. If the specified end is less than the specified start, the
* values will be swapped in the range.
*/
public Range(int start, int end) {
super();
this.start = Math.min(start, end);
this.end = Math.max(start, end);
this.length = this.end - this.start + 1;
}
/**
* Return whether the range includes the specified
* index.
*/
public boolean includes(int index) {
return (this.start <= index) && (index <= this.end);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if ( ! (o instanceof Range)) {
return false;
}
Range otherRange = (Range) o;
return (this.start == otherRange.start)
&& (this.end == otherRange.end);
}
@Override
public int hashCode() {
return this.start ^ this.end;
}
@Override
public Range clone() {
try {
return (Range) super.clone();
} catch (CloneNotSupportedException ex) {
throw new InternalError();
}
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
this.toString(sb);
return sb.toString();
}
public void toString(StringBuilder sb) {
sb.append('[');
sb.append(this.start);
sb.append(", "); //$NON-NLS-1$
sb.append(this.end);
sb.append(']');
}
}
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