All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.databene.commons.converter.PropertyArray2JavaBeanConverter Maven / Gradle / Ivy

Go to download

'databene commons' is an open source Java library by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

The newest version!
/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * 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.databene.commons.converter;

import org.databene.commons.Assert;
import org.databene.commons.BeanUtil;
import org.databene.commons.ConversionException;
import org.databene.commons.Mutator;
import org.databene.commons.StringUtil;
import org.databene.commons.accessor.FeatureAccessor;
import org.databene.commons.converter.util.ClassProvider;
import org.databene.commons.converter.util.ReferenceResolver;
import org.databene.commons.mutator.AnyMutator;
import org.databene.commons.mutator.EmptyMutator;

/**
 * Converts an array of property values to a JavaBean instance.
 * Created: 19.09.2014 10:24:05
 * @since 1.0.0
 * @author Volker Bergmann
 */

public class PropertyArray2JavaBeanConverter extends UnsafeConverter {

	private ClassProvider beanClassProvider;
	private String[] attributePaths;
	private Mutator[] mutators;
	private ReferenceResolver referenceResolver;
	
	public PropertyArray2JavaBeanConverter(ClassProvider beanClassProvider, String[] attributePaths, ReferenceResolver referenceResolver) {
		super(Object[].class, Object.class);
		this.beanClassProvider = Assert.notNull(beanClassProvider, "beanClassProvider");
		this.attributePaths = Assert.notNull(attributePaths, "attributePaths");
		this.referenceResolver = Assert.notNull(referenceResolver, "referenceResolver");
		createMutators(attributePaths);
	}

	@Override
	public Object convert(Object[] propertyArray) throws ConversionException {
		if (propertyArray == null)
			return null;
		Class beanClass = beanClassProvider.classFor(propertyArray);
		Object bean = BeanUtil.newInstance(beanClass);
		int elementsToUse = Math.min(propertyArray.length, attributePaths.length);
		for (int i = 0; i < elementsToUse; i++) {
			String attributePath = attributePaths[i];
			String[] pathParts = StringUtil.splitOnLastSeparator(attributePath, '.');
			Object target = haveTargetObject(bean, pathParts[0]);
			mutators[i].setValue(bean, referenceResolver.resolveReferences(propertyArray[i], target, pathParts[1]));
		}
		return bean;
	}


	// private helpers -------------------------------------------------------------------------------------------------

	private void createMutators(String[] attributePaths) {
		this.mutators = new Mutator[attributePaths.length];
        for (int i = 0; i < attributePaths.length; i++) {
            String attributePath = attributePaths[i];
            if ("class".equals(attributePath)) {
            	this.mutators[i] = new EmptyMutator();
            } else {
            	this.mutators[i] = new AnyMutator(attributePath, false, true);
            }
        }
	}

	private Object haveTargetObject(Object bean, String featurePath) {
		if (featurePath == null) {
			return bean;
		} else if (featurePath.contains(".")) {
			String[] pathParts = StringUtil.splitOnFirstSeparator(featurePath, '.');
			Object child = haveTargetObject(bean, pathParts[0]);
			return haveTargetObject(child, pathParts[1]);
		} 
		Object value = FeatureAccessor.getValue(bean, featurePath, false);
		if (value != null)
			return value;
		else
			return AnyMutator.setFeatureDefault(bean, featurePath);
	}

}
    

    

    

            

    

            



    
    






    
© 2015 - 2024 Weber Informatics LLC | Privacy Policy