ServiceOperationsImpl.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.service.roo.addon.addon;

import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.Validate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.springframework.roo.classpath.details.annotations.AnnotatedJavaType;
import org.springframework.roo.classpath.details.annotations.AnnotationMetadata;
import org.springframework.roo.classpath.itd.InvocableMemberBodyBuilder;
import org.springframework.roo.model.JavaSymbolName;
import org.springframework.roo.model.JavaType;

/**
 * Addon for Handle Service Layer
 * 
 * @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 ServiceOperationsImpl implements ServiceOperations {

    @Reference
    private JavaParserService javaParserService;

    /**
     * {@inheritDoc}
     * <p>
     * Adds @org.springframework.stereotype.Service annotation to the class.
     * </p>
     */
    public void createServiceClass(JavaType serviceClass) {

        javaParserService.createServiceClass(serviceClass);
    }

    /**
     * {@inheritDoc}
     * <p>
     * Creates the body of the new method (the return line), checks the input
     * parameters if they exists and calls the 'createMethod' method from
     * {@link JavaParserService} to add into the class.
     * </p>
     */
    public void addServiceOperation(JavaSymbolName operationName,
            JavaType returnType, JavaType className,
            List<JavaType> paramTypeList, List<String> paramNameList,
            List<JavaType> exceptionList) {

        InvocableMemberBodyBuilder bodyBuilder = new InvocableMemberBodyBuilder();

        // Create some method content to get the user started.
        String todoMessage = "// TODO: You have to place the method logic here.\n";
        bodyBuilder.appendFormalLine(todoMessage);

        // If return type != null we must add method body (return null);
        String returnLine = "return "
                .concat(returnType == null ? ";" : "null;");
        bodyBuilder.appendFormalLine(returnLine);

        // Parameter names
        List<JavaSymbolName> parameterNameList = new ArrayList<JavaSymbolName>();
        // Parameter types.
        List<AnnotatedJavaType> parameterTypeList = new ArrayList<AnnotatedJavaType>();

        Validate.isTrue(
                paramTypeList != null
                        && paramTypeList.size() == paramNameList.size(),
                "The method parameter types must have the same number of parameter names to create the method.");

        if (paramNameList.size() > 0) {
            for (String parameterName : paramNameList) {
                parameterNameList.add(new JavaSymbolName(parameterName));
            }
        }

        if (paramTypeList != null && paramTypeList.size() > 0) {
            for (JavaType parameterType : paramTypeList) {
                parameterTypeList.add(new AnnotatedJavaType(parameterType,
                        new ArrayList<AnnotationMetadata>()));
            }
        }

        javaParserService.createMethod(operationName, returnType, className,
                Modifier.PUBLIC, exceptionList,
                new ArrayList<AnnotationMetadata>(), parameterTypeList,
                parameterNameList, bodyBuilder.getOutput());
    }

}