101 lines
3.0 KiB
Java
101 lines
3.0 KiB
Java
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package org.broadinstitute.sting.utils;
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import java.util.Iterator;
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import java.util.List;
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import java.util.LinkedList;
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import java.io.*;
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/**
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* Created by IntelliJ IDEA.
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* User: depristo
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* Date: Mar 25, 2009
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* Time: 10:46:07 AM
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* To change this template use File | Settings | File Templates.
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*/
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public class xReadLines implements Iterator<String>, Iterable<String> {
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BufferedReader in; // The stream we're reading from
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String nextline = null; // Return value of next call to next()
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public xReadLines(final File filename) throws FileNotFoundException {
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// Open the file and read and remember the first line.
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// We peek ahead like this for the benefit of hasNext().
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this(new FileReader(filename));
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}
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public xReadLines(final FileReader fileReader) throws FileNotFoundException {
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// Open the file and read and remember the first line.
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// We peek ahead like this for the benefit of hasNext().
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this(new BufferedReader(fileReader));
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}
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public xReadLines(final InputStream inputStream) throws FileNotFoundException {
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// Open the file and read and remember the first line.
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// We peek ahead like this for the benefit of hasNext().
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this(new BufferedReader(new InputStreamReader(inputStream)));
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}
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public xReadLines(final BufferedReader in) throws FileNotFoundException {
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// Open the file and read and remember the first line.
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// We peek ahead like this for the benefit of hasNext().
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try {
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this.in = in;
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nextline = readNextLine();
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} catch(IOException e) {
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throw new IllegalArgumentException(e);
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}
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}
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public List<String> readLines() {
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List<String> lines = new LinkedList<String>();
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for ( String line : this ) {
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lines.add(line);
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}
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return lines;
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}
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public Iterator<String> iterator() {
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return this;
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}
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// If the next line is non-null, then we have a next line
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public boolean hasNext() {
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return nextline != null;
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}
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private String readNextLine() throws IOException {
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String nextline = in.readLine(); // Read another line
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if (nextline == null)
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return null;
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else
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nextline = nextline.trim();
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return nextline;
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}
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// Return the next line, but first read the line that follows it.
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public String next() {
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try {
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String result = nextline;
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nextline = readNextLine();
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// If we haven't reached EOF yet
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if (nextline == null) {
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in.close(); // And close on EOF
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}
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// Return the line we read last time through.
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return result;
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} catch(IOException e) {
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throw new IllegalArgumentException(e);
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}
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}
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// The file is read-only; we don't allow lines to be removed.
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public void remove() {
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throw new UnsupportedOperationException();
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}
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public void close() throws IOException {
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this.in.close();
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}
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}
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