Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * This software is in the public domain under CC0 1.0 Universal plus a
 * Grant of Patent License.
 *
 * To the extent possible under law, the author(s) have dedicated all
 * copyright and related and neighboring rights to this software to the
 * public domain worldwide. This software is distributed without any
 * warranty.
 *
 * You should have received a copy of the CC0 Public Domain Dedication
 * along with this software (see the LICENSE.md file). If not, see
 * <http://creativecommons.org/publicdomain/zero/1.0/>.
 */

import java.util.*;

public class Main {
    /** Find all values of a named field in a nested Map containing fields, Maps, and Collections of Maps (Lists, etc) */
    public static void findAllFieldsNestedMap(String key, Map theMap, Set<Object> valueSet) {
        Object localValue = theMap.get(key);
        if (localValue != null)
            valueSet.add(localValue);
        for (Object value : theMap.values()) {
            if (value instanceof Map) {
                findAllFieldsNestedMap(key, (Map) value, valueSet);
            } else if (value instanceof Collection) {
                // only look in Collections of Maps
                for (Object colValue : (Collection) value) {
                    if (colValue instanceof Map)
                        findAllFieldsNestedMap(key, (Map) colValue, valueSet);
                }
            }
        }
    }
}