DynConfigurationConverter.java

/*
 * gvNIX is an open source tool for rapid application development (RAD).
 * Copyright (C) 2010 Generalitat Valenciana
 * 
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.gvnix.dynamic.configuration.roo.addon;

import java.util.List;

import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.gvnix.dynamic.configuration.roo.addon.entity.DynConfiguration;
import org.gvnix.dynamic.configuration.roo.addon.entity.DynConfigurationList;
import org.springframework.roo.shell.Completion;
import org.springframework.roo.shell.Converter;
import org.springframework.roo.shell.MethodTarget;

/**
 * Dynamic configuration entity converter.
 * 
 * @author <a href="http://www.disid.com">DISID Corporation S.L.</a> made for <a
 *         href="http://www.dgti.gva.es">General Directorate for Information
 *         Technologies (DGTI)</a>
 */
@Component
@Service
public class DynConfigurationConverter implements Converter<DynConfiguration> {

    @Reference
    private Operations operations;

    /**
     * {@inheritDoc}
     */
    public DynConfiguration convertFromText(String value,
            Class<?> requiredType, String optionContext) {

        // Create a dynamic configuration with name only
        return new DynConfiguration(value);
    }

    /**
     * {@inheritDoc}
     */
    public boolean getAllPossibleValues(List<Completion> completions,
            Class<?> requiredType, String existingData, String optionContext,
            MethodTarget target) {

        // Find all stored configurations
        DynConfigurationList dynConfs = operations.findConfigurations();

        // No stored configurations
        if (dynConfs.isEmpty()) {

            return false;
        }

        // Add each configuration name to completions
        for (DynConfiguration dynConf : dynConfs) {
            completions.add(new Completion(dynConf.getName()));
        }

        return true;
    }

    /**
     * {@inheritDoc}
     */
    public boolean supports(Class<?> requiredType, String optionContext) {

        // This converter supports dynamic configuration
        return DynConfiguration.class.isAssignableFrom(requiredType);
    }

}