66 lines
2.1 KiB
Java
66 lines
2.1 KiB
Java
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/*
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* The Broad Institute
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* SOFTWARE COPYRIGHT NOTICE AGREEMENT
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* This software and its documentation are copyright 2009 by the
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* Broad Institute/Massachusetts Institute of Technology. All rights are reserved.
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*
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* This software is supplied without any warranty or guaranteed support whatsoever. Neither
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* the Broad Institute nor MIT can be responsible for its use, misuse, or functionality.
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*/
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package edu.mit.broad.sam.util;
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/**
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* Implementation of LineReader that gets its input from a String. No charset conversion
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* is necessary because the String is in unicode. Handles CR, LF or CRLF line termination,
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* but if asked to return the line terminator, it always comes back as LF.
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*/
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public class StringLineReader implements LineReader {
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private final String theString;
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private int curPos = 0;
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private int lineNumber = 0;
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public StringLineReader(final String s) {
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// Simplify later processing by replacing crlf with just lf, and replacing solo cr with lf
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this.theString = s.replaceAll("\r\n", "\n").replaceAll("\r", "\n");
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}
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/**
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* Read a line and remove the line terminator
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*/
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public String readLine() {
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return readLine(false);
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}
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/**
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* Read a line and optionally include the line terminator
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*
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* @param includeTerminators
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* @return
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*/
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public String readLine(final boolean includeTerminators) {
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if (curPos == theString.length()) {
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return null;
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}
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final int nextLfIndex = theString.indexOf('\n', curPos);
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if (nextLfIndex == -1) {
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final int startPos = curPos;
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curPos = theString.length();
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++lineNumber;
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return theString.substring(startPos);
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}
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final int startPos = curPos;
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final int endPos = nextLfIndex + (includeTerminators? 1: 0);
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curPos = nextLfIndex + 1;
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++lineNumber;
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return theString.substring(startPos, endPos);
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}
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/**
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* @return 1-based number of line most recently read
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*/
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public int getLineNumber() {
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return lineNumber;
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}
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}
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