de.micromata.genome.util.bean.PropertyAttrSetterGetter.java Source code

Introduction

Here is the source code for de.micromata.genome.util.bean.PropertyAttrSetterGetter.java

Source

//
// Copyright (C) 2010-2016 Micromata GmbH
//
// 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 de.micromata.genome.util.bean;

import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;

import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.lang3.ArrayUtils;

/**
 * AttrSetter/Getter implementation based on BeanUtils
 * 
 * The set-Method must called always with the same BEAN type.
 *
 * @author roger@micromata.de
 * @param <BEAN> the generic type
 * @param <VAL> the generic type
 */
public class PropertyAttrSetterGetter<BEAN, VAL> implements NamedAttrSetter<BEAN, VAL>, NamedAttrGetter<BEAN, VAL> {

    /**
     * The property name.
     */
    private String propertyName;

    /**
     * The prop descriptor.
     */
    private transient PropertyDescriptor propDescriptor;

    /**
     * Instantiates a new property attr setter getter.
     *
     * @param propertyName the property name
     */
    public PropertyAttrSetterGetter(String propertyName) {
        this.propertyName = propertyName;
    }

    /**
     * Instantiates a new property attr setter getter.
     *
     * @param propDescriptor the prop descriptor
     */
    public PropertyAttrSetterGetter(PropertyDescriptor propDescriptor) {
        this.propertyName = propDescriptor.getName();
        this.propDescriptor = propDescriptor;
    }

    /**
     * Inits the.
     *
     * @param bean the bean
     */
    private void init(BEAN bean) {
        if (propDescriptor != null) {
            return;
        }

        try {
            propDescriptor = PropertyUtils.getPropertyDescriptor(bean, propertyName);
        } catch (Exception ex) {
            throw new RuntimeException(
                    "Cannot retrieve property " + propertyName + " from bean class " + bean.getClass().getName());
        }
    }

    @Override
    public void set(BEAN bean, VAL value) {
        init(bean);
        try {
            propDescriptor.getWriteMethod().invoke(bean, new Object[] { value });
        } catch (RuntimeException ex) { // NOSONAR "Illegal Catch" framework
            throw ex;// NOSONAR "Illegal Catch" framework
        } catch (InvocationTargetException ex) {
            Throwable nex = ex.getCause();
            if (nex instanceof RuntimeException) {
                throw (RuntimeException) nex; // NOSONAR "Illegal Catch" framework
            }
            throw new RuntimeException(nex); // NOSONAR "Illegal Catch" framework
        } catch (Exception ex) { // NOSONAR "Illegal Catch" framework
            throw new RuntimeException(ex); // NOSONAR "Illegal Catch" framework
        }
    }

    @Override
    @SuppressWarnings("unchecked")
    public VAL get(BEAN bean) {
        init(bean);
        try {
            return (VAL) propDescriptor.getReadMethod().invoke(bean, ArrayUtils.EMPTY_OBJECT_ARRAY);
        } catch (RuntimeException ex) {// NOSONAR "Illegal Catch" framework 
            throw ex;// NOSONAR "Illegal Catch" framework
        } catch (InvocationTargetException ex) {
            Throwable nex = ex.getCause();
            if (nex instanceof RuntimeException) { // NOSONAR "Illegal Catch" framework
                throw (RuntimeException) nex; // NOSONAR "Illegal Catch" framework
            }
            throw new RuntimeException(nex);// NOSONAR "Illegal Catch" framework
        } catch (Exception ex) {// NOSONAR "Illegal Catch" framework
            throw new RuntimeException(ex);// NOSONAR "Illegal Catch" framework
        }
    }

    @Override
    public String getName() {
        return propertyName;
    }

    public String getPropertyName() {
        return propertyName;
    }

    public void setPropertyName(String propertyName) {
        this.propertyName = propertyName;
    }

    public PropertyDescriptor getPropDescriptor() {
        return propDescriptor;
    }

    public void setPropDescriptor(PropertyDescriptor propDescriptor) {
        this.propDescriptor = propDescriptor;
    }

}