Package org.megatome.frame2.introspector

Source Code of org.megatome.frame2.introspector.IndexedCommand

/*
* ====================================================================
*
* Frame2 Open Source License
*
* Copyright (c) 2004-2007 Megatome Technologies.  All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* 3. The end-user documentation included with the redistribution, if
*    any, must include the following acknowlegement:
*       "This product includes software developed by
*        Megatome Technologies."
*    Alternately, this acknowlegement may appear in the software itself,
*    if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Frame2 Project", and "Frame2",
*    must not be used to endorse or promote products derived
*    from this software without prior written permission. For written
*    permission, please contact iamthechad@sourceforge.net.
*
* 5. Products derived from this software may not be called "Frame2"
*    nor may "Frame2" appear in their names without prior written
*    permission of Megatome Technologies.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED.  IN NO EVENT SHALL MEGATOME TECHNOLOGIES OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*/
package org.megatome.frame2.introspector;

import java.beans.IndexedPropertyDescriptor;
import java.lang.reflect.Method;

import org.megatome.frame2.log.Logger;
import org.megatome.frame2.log.LoggerFactory;

/**
* Executes sets and gets on indexed bean properties.
*/
class IndexedCommand extends BeanCommand {
    private static Logger LOGGER = LoggerFactory.instance(IndexedCommand.class
            .getName());

    @Override
  void set(PropertyMapping mapping, Object value) throws BeanException {
        IndexedPropertyDescriptor descriptor = (IndexedPropertyDescriptor)getDescriptor(
                mapping.getBean(), mapping.getKey());

        if (descriptor != null) {
            Method setMethod = descriptor.getIndexedWriteMethod();
            Class<?> type = descriptor.getIndexedPropertyType();
            int index = KeyHelper.getIndex(mapping.getKey());

            try {
                Object convertedValue = Converter.convertValueToType(value,
                        type);

                setMethod.invoke(mapping.getBean(), new Object[] {
                        Integer.valueOf(index), convertedValue });
            } catch (Exception e) {
                throw new MappingException("Unable to set property", mapping, //$NON-NLS-1$
                        value, e);
            }
        } else {
            LOGGER.info("Unable to locate descriptor for property " //$NON-NLS-1$
                    + mapping.getKey());
        }
    }

    @Override
  Object get(PropertyMapping mapping) throws BeanException {
        IndexedPropertyDescriptor descriptor = (IndexedPropertyDescriptor)getDescriptor(
                mapping.getBean(), mapping.getKey());

        if (descriptor != null) {
            try {
                Method getMethod = descriptor.getIndexedReadMethod();
                int index = KeyHelper.getIndex(mapping.getKey());

                return getMethod.invoke(mapping.getBean(),
                        new Object[] { Integer.valueOf(index) });
            } catch (Exception e) {
                throw new MappingException("Unable to get property", mapping, e); //$NON-NLS-1$
            }
        }

        LOGGER.info("Unable to locate descriptor for property " //$NON-NLS-1$
                + mapping.getKey());
        return null;
    }
}
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