io.ultreia.java4all.lang.Setters Maven / Gradle / Ivy

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package io.ultreia.java4all.lang;

/*-
 * #%L
 * JAXX :: Widgets Common
 * %%
 * Copyright (C) 2008 - 2020 Code Lutin, Ultreia.io
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * #L%
 */

import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
import org.apache.commons.beanutils.PropertyUtils;

/**
 * Created by tchemit on 25/09/17.
 *
 * @author Tony Chemit - [email protected]
 */
public class Setters {

    /**
     * Obtains all writeable properties from a given type.
     *
     * @param beanType the type to seek
     * @return the set of all writeable properties for the given type
     */
    public static Set getWriteableProperties(Class beanType) {
        Objects.requireNonNull(beanType);
        Set result = new HashSet<>();

        Objects2.walk(new Objects2.ClassWalkVisitor() {
            @Override
            public void onVisit(Class beanType) {
                for (PropertyDescriptor descriptor : PropertyUtils.getPropertyDescriptors(beanType)) {
                    if (Objects2.IS_WRITE_DESCRIPTOR.test(descriptor)) {
                        result.add(descriptor.getName());
                    }
                }
            }

            @Override
            public boolean canContinue() {
                return true;
            }
        }, beanType);

        return result;
    }

    public static Method getMutator(Object bean, String property) {
        Objects.requireNonNull(bean);
        Objects.requireNonNull(property);

        Method mutator = null;

        try {
            PropertyDescriptor descriptor = PropertyUtils.getPropertyDescriptor(bean, property);
            if (descriptor != null) {
                mutator = descriptor.getWriteMethod();
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

        return mutator;
    }

}