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'databene webdecs' is an open source software library for WEB Data Extraction, Conversion and Scripting, written by Volker Bergmann.

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/*
 * (c) Copyright 2007 by Volker Bergmann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted under the terms of the
 * GNU General Public License.
 *
 * For redistributing this software or a derivative work under a license other
 * than the GPL-compatible Free Software License as defined by the Free
 * Software Foundation or approved by OSI, you must first obtain a commercial
 * license to this software product from Volker Bergmann.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
 * HEREBY EXCLUDED. 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 org.databene.regex;

/**
 * Represents a quantifier of a regular expression, e.g. '{1,3}'.
*
*/ public class Quantifier { /** minimum length */ private int min; /** maximum length */ private Integer max; /** Complete constructor that takes values for all attributes */ public Quantifier(int min, Integer max) { this.min = min; this.max = max; } /** returns the minimum value */ public int getMin() { return min; } /** returns the maximum value */ public Integer getMax() { return max; } // java.lang.Object overrides -------------------------------------------------------------------------------------- /** * Creates a String of regular expression format, e.g. '{2,}', '{1,3}', '+', '?' * @see java.lang.Object#equals(Object) */ @Override public String toString() { if (max != null && min == max) return (min == 1 ? "" : '{' + String.valueOf(min) + '}'); else if (min == 0) { if (max == null) return "*"; else if (max == 1) return "?"; else return "{0," + max + '}'; } else if (min == 1) return (max == null ? "+" : "{1," + max + "}"); else return (max == null ? "{" + min + ",}" : "{1," + "}"); } /** * @see java.lang.Object#equals(Object) */ @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; final Quantifier that = (Quantifier) o; if (max != that.max) return false; return min == that.min; } /** * @see java.lang.Object#equals(Object) */ @Override public int hashCode() { return 29 * min + (max != null ? max : 0); } }




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