001    /*
002     * Copyright 2008 - 2008 JEuclid, http://jeuclid.sf.net
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *      http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    /* $Id: OperatorForm.java,v cae99f384592 2009/06/03 12:42:28 maxberger $ */
018    
019    package net.sourceforge.jeuclid.elements.support.operatordict;
020    
021    import java.util.Locale;
022    
023    /**
024     * @version $Revision: cae99f384592 $
025     */
026    public enum OperatorForm {
027        /** Prefix form, e.g. +a. */
028        PREFIX,
029        /** Infix form, e.g. a+a. */
030        INFIX,
031        /** Postfix form, e.g. a+. */
032        POSTFIX;
033    
034        private OperatorForm() {
035            // Empty on purpose.
036        }
037    
038        /**
039         * Parse a String into an OperatorForm.
040         * 
041         * @param form
042         *            the string to parse
043         * @return an OperatorForm
044         */
045        public static OperatorForm parseOperatorForm(final String form) {
046            try {
047                return OperatorForm.valueOf(form.toUpperCase(Locale.US));
048            } catch (final IllegalArgumentException iae) {
049                return OperatorForm.INFIX;
050            }
051        }
052    }