find First Match between two Collections - Android java.util

Android examples for java.util:Collection Find

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Description

find First Match between two Collections

Demo Code

/*/*from   ww  w .j av  a2  s  . c  o  m*/
 * Copyright 2002-2008 the original author or authors.
 *
 * Licensed 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.
 */
import java.util.Arrays;
import java.util.Collection;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;

public class Main{
    public static void main(String[] argv){
        Collection source = java.util.Arrays.asList("asdf","book2s.com");
        Collection candidates = java.util.Arrays.asList("asdf","book2s.com");
        System.out.println(findFirstMatch(source,candidates));
    }
    public static Object findFirstMatch(Collection<?> source,
            Collection<?> candidates) {
        if (isEmpty(source) || isEmpty(candidates)) {
            return null;
        }
        for (Object candidate : candidates) {
            if (source.contains(candidate)) {
                return candidate;
            }
        }
        return null;
    }
    public static boolean isEmpty(Collection<?> collection) {
        return (collection == null || collection.isEmpty());
    }
    public static boolean isEmpty(Map<?, ?> map) {
        return (map == null || map.isEmpty());
    }
    public static boolean contains(Iterator<?> iterator, Object element) {
        if (iterator != null) {
            while (iterator.hasNext()) {
                Object candidate = iterator.next();
                if (ObjectUtil.nullSafeEquals(candidate, element)) {
                    return true;
                }
            }
        }
        return false;
    }
    public static boolean contains(Enumeration<?> enumeration,
            Object element) {
        if (enumeration != null) {
            while (enumeration.hasMoreElements()) {
                Object candidate = enumeration.nextElement();
                if (ObjectUtil.nullSafeEquals(candidate, element)) {
                    return true;
                }
            }
        }
        return false;
    }
}

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