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Java Reflection provides a small package with nifty reflection features that will help with finding constructors, methods and value conversions

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/*
 * Copyright (C) ${project.inceptionYear} Benny Bottema ([email protected])
 *
 * 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.
 */
package org.bbottema.javareflection.valueconverter.converters;

import lombok.experimental.UtilityClass;
import org.bbottema.javareflection.util.Function;
import org.bbottema.javareflection.util.Function.Functions;
import org.bbottema.javareflection.valueconverter.ValueFunction;
import org.bbottema.javareflection.valueconverter.ValueFunction.ValueFunctionImpl;

import java.util.ArrayList;
import java.util.Collection;

/**
 * Attempts to convert a Boolean to the target datatype.
 * 
 * Conversions are as follows:
 * 

 * Boolean (or boolean): value
 * String: value.toString()
 * Number (or primitive number): 0 or 1
 * 
 */
@UtilityClass
public final class BooleanConverters {
	
	public static final Collection> BOOLEAN_CONVERTERS = produceBooleanConverters();
	
	private static Collection> produceBooleanConverters() {
		ArrayList> converters = new ArrayList<>();
		converters.add(new ValueFunctionImpl<>(boolean.class, Boolean.class, Functions.identity()));
		converters.add(new ValueFunctionImpl<>(Boolean.class, boolean.class, Functions.identity()));
		converters.add(new ValueFunctionImpl<>(boolean.class, boolean.class, Functions.identity()));
		converters.add(new ValueFunctionImpl<>(Boolean.class, Boolean.class, Functions.identity()));
		
		converters.add(new ValueFunctionImpl<>(Boolean.class, String.class, Functions.simpleToString()));
		converters.add(new ValueFunctionImpl<>(Boolean.class, Number.class, new BooleanToNumberFunction()));
		return converters;
	}
	
	private static class BooleanToNumberFunction implements Function {
		@Override
		public Number apply(Boolean value) {
			return value ? 1 : 0;
		}
	}
}