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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.search.ui.text;
import org.eclipse.jface.util.Assert;
/**
* A textual match in a given object. This class may be subclassed (to add
* additional match state like accuracy, etc). The element a match is reported
* against is assumed to contain the match, and the UI will group matches
* against the same element together. A match has an offset and a length which
* may be specified in characters or in lines.
*
* @since 3.0
*/
public class Match {
/**
* A constant expressing that offset and length of this match are specified
* in lines
*/
public static final int UNIT_LINE= 1;
/**
* A constant expressing that offset and length of this match are specified
* in characters
*/
public static final int UNIT_CHARACTER= 2;
private Object fElement;
private int fOffset;
private int fLength;
private int fUnit;
/**
* Constructs a new Match object.
*
* @param element
* the element that contains the match
* @param unit
* the unit offset and length are based on
* @param offset
* the offset the match starts at
* @param length
* the length of the match
*/
public Match(Object element, int unit, int offset, int length) {
Assert.isTrue(unit == UNIT_CHARACTER || unit == UNIT_LINE);
fElement= element;
fOffset= offset;
fLength= length;
fUnit= unit;
}
/**
* Constructs a new Match object. The offset and length will be based on
* characters.
*
* @param element
* the element that contains the match
* @param offset
* the offset the match starts at
* @param length
* the length of the match
*/
public Match(Object element, int offset, int length) {
this(element, UNIT_CHARACTER, offset, length);
}
/**
* Returns the offset of this match.
*
* @return the offset
*/
public int getOffset() {
return fOffset;
}
/**
* Sets the offset of this match.
*
* @param offset
* the offset to set
*/
public void setOffset(int offset) {
fOffset= offset;
}
/**
* Returns the length of this match.
*
* @return the length
*/
public int getLength() {
return fLength;
}
/**
* Sets the length.
*
* @param length
* the length to set
*/
public void setLength(int length) {
fLength= length;
}
/**
* Returns the element that contains this match.
*
* @return the element that contains this match
*/
public Object getElement() {
return fElement;
}
/**
* Returns whether match length and offset are expressed in lines or
* characters.
*
* @return either UNIT_LINE or UNIT_CHARACTER;
*/
public int getBaseUnit() {
return fUnit;
}
}
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