001/**
002 *  Licensed to the Apache Software Foundation (ASF) under one or more
003 *  contributor license agreements.  See the NOTICE file distributed with
004 *  this work for additional information regarding copyright ownership.
005 *  The ASF licenses this file to You under the Apache License, Version 2.0
006 *  (the "License"); you may not use this file except in compliance with
007 *  the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 *  Unless required by applicable law or agreed to in writing, software
012 *  distributed under the License is distributed on an "AS IS" BASIS,
013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 *  See the License for the specific language governing permissions and
015 *  limitations under the License.
016 */
017package org.apache.isis.core.progmodel.facets.param.autocomplete;
018
019import java.lang.annotation.Annotation;
020import java.lang.reflect.Method;
021
022import org.apache.isis.applib.annotation.MinLength;
023
024public class MinLengthUtil {
025
026    /**
027     * Finds the value of the {@link MinLength} annotation on the first parameter of the
028     * supplied method.
029     */
030    public static int determineMinLength(final Method method) {
031        final Annotation[][] parameterAnnotations = method.getParameterAnnotations();
032        if(parameterAnnotations.length == 1) {
033            final Annotation[] searchArgAnnotations = parameterAnnotations[0];
034            for(Annotation annotation: searchArgAnnotations) {
035                if(annotation instanceof MinLength) {
036                    MinLength minLength = (MinLength) annotation;
037                    return minLength.value();
038                }
039            }
040        }
041        return MinLengthUtil.MIN_LENGTH_DEFAULT;
042    }
043
044    public static final int MIN_LENGTH_DEFAULT = 1;
045
046
047
048}