net.ossindex.common.utils.LineIndexer Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ossindex-api Show documentation

OSS Index REST API access library

There is a newer version: 3.0.9

/**
 *	Copyright (c) 2015 Vör Security Inc.
 *	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 the  nor the
 *	      names of its 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  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 net.ossindex.common.utils;


/** Given a simple list of text rows, provide mechanisms for finding
 * out what row provides the best match for specified text.
 * 
 * @author Ken Duck
 *
 */
public class LineIndexer
{
	/**
	 * File lines
	 */
	private String[] rows;

	/** Index the specified file
	 * 
	 * @param text File text to index
	 */
	public LineIndexer(String text)
	{
		if(text == null) text = "";
		this.rows = text.split("\n");
	}

	/** Get first line where the specified text is matched
	 * 
	 * @param text Text to search for
	 * @return The position of the identified text
	 */
	public FilePosition getFirst(String text)
	{
		int pos = 1;
		for(int i = 0; i < rows.length; i++)
		{
			int length = rows[i].length();
			if(rows[i].contains(text)) return new FilePosition(i + 1, pos, pos + length);
			pos += length + 1; // +1 to account for the stripped \n
		}
		return new FilePosition(0, 0, 0);
	}

}