ConnectorPropertyJPAEntity.java

/**
 * Licensed to the Austrian Association for Software Tool Integration (AASTI)
 * under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership. The AASTI licenses this file to you 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.openengsb.persistence.connector.jpabackend;

import java.lang.reflect.InvocationTargetException;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

import org.apache.commons.lang.ClassUtils;
import org.apache.commons.lang.reflect.ConstructorUtils;
import org.openengsb.core.api.persistence.PersistenceException;

/**
 * A simple JPA wrapper for a single Connector property. The wrapper saves the class and the value of toString() and
 * uses the constructor with one String argument to reconstruct the object.
 */
@Entity(name = "CONNECTOR_PROPERTY")
public class ConnectorPropertyJPAEntity {

    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Id
    private Long id;

    @Column(name = "STRVALUE", nullable = false, length = 511)
    private String strValue;
    @Column(name = "CLASSNAME", nullable = false, length = 127)
    private String className;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getClassName() {
        return className;
    }

    public void setClassName(String className) {
        this.className = className;
    }

    public String getStrValue() {
        return strValue;
    }

    public void setStrValue(String strValue) {
        this.strValue = strValue;
    }

    public static ConnectorPropertyJPAEntity getFromObject(Object obj) {
        ConnectorPropertyJPAEntity entity = new ConnectorPropertyJPAEntity();
        entity.setStrValue(obj.toString());
        entity.setClassName(ClassUtils.primitiveToWrapper(obj.getClass()).getName());
        return entity;
    }

    public Object toObject() throws PersistenceException {
        try {
            Class<?> clazz = this.getClass().getClassLoader()
                .loadClass(this.className);
            return ConstructorUtils.invokeConstructor(clazz, this.strValue);
        } catch (ClassNotFoundException e) {
            throw new PersistenceException(e);
        } catch (NoSuchMethodException e) {
            throw new PersistenceException(e);
        } catch (IllegalAccessException e) {
            throw new PersistenceException(e);
        } catch (InvocationTargetException e) {
            throw new PersistenceException(e);
        } catch (InstantiationException e) {
            throw new PersistenceException(e);
        }
    }
}