test/jdk/java/io/charStreams/StringGenerator.java

/*
 * Copyright (c) 1997, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/**/


public class StringGenerator {

    private IntGenerator ig;
    private CharGenerator cg;
    private int limit;
    private int count = 0;

    public StringGenerator(IntGenerator ig, CharGenerator cg, int limit) {
        this.ig = ig;
        this.cg = cg;
        this.limit = limit;
    }

    public StringGenerator(IntGenerator ig, CharGenerator cg) {
        this(ig, cg, -1);
    }

    public StringGenerator(IntGenerator ig, int limit) {
        this(ig, new CharGenerator(ig), limit);
    }

    public StringGenerator(IntGenerator ig) {
        this(ig, -1);
    }

    public StringGenerator(int limit) {
        this(new IntGenerator(), limit);
    }

    public StringGenerator() {
        this(new IntGenerator());
    }

    public String next() {
        if ((count >= limit) && (limit >= 0))
            return null;

        int len = ig.next(80);
        StringBuffer s = new StringBuffer(len);

        for (int i = 0; i < len; i++)
            s.append(cg.next());

        count++;
        return s.toString();
    }
}