StringFunctions.java

/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */

package org.apache.isis.core.commons.lang;

import com.google.common.base.Function;

public final class StringFunctions {
    
    public static final Function<String,String> TRIM = new Function<String,String>(){
        @Override
        public String apply(String input) {
            return input==null?"":input.trim();
        }
    };

    private StringFunctions() {
    }

    public static Function<String, String> toLowerCase() {
        return new Function<String, String>() {
            @Override
            public String apply(String input) {
                return input != null? input.toLowerCase(): null;
            }
        };
    }
    
    public static Function<String, String> toUpperCase() {
        return new Function<String, String>() {
            @Override
            public String apply(String input) {
                return input != null? input.toUpperCase(): null;
            }
        };
    }

}