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A re-usable library of Java classes. Originally stand-alone, many of the classes have since gone into various parts of the Jakarta Commons project, and thus this package contains various dependencies.

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/*
 * Copyright (c) 2003, Henri Yandell
 * 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 Genjava-Core 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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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 com.generationjava.io;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.NumberUtils;

/// TODO: Have it do ConvertUtils stuff. "1:,2%,3$" etc.
public class FixedWidthReader {
 
    private BufferedReader rdr;
    private int[] widths;
    private String trim;
    private int minWidth;
    private boolean hasGlob;
 
    public FixedWidthReader(Reader rdr) {
        if( !(rdr instanceof BufferedReader) ) {
            rdr = new BufferedReader(rdr);
        }
        this.rdr = (BufferedReader)rdr;
    }

    public void setWidths(int[] widths) {
        this.widths = widths;
        calcSizeCondition();
    }

 

    public void setWidths(String widths) {
        String[] nums = StringUtils.split(widths, ",");
        int sz = nums.length;
        this.widths = new int[sz];

        for(int i=0; i this.minWidth) {
                return null;
            }
        }

 
        int sz = widths.length;
        String[] fields = new String[widths.length];
 
        boolean reverse = false;
        int idx = 0;
        int i = 0;      // we hang on to this in case it's needed in the j loop

        for(i=0; ii; j--) {
                rev -= this.widths[j];
                fields[j] = line.substring(rev, rev+this.widths[j]);
            }
            fields[i] = line.substring(idx, rev);
        }

        if(this.trim != null) {
            for(int index=0; index