/*
 * JBoss, Home of Professional Open Source
 * Copyright 2014, Red Hat, Inc. and/or its affiliates, and individual
 * contributors by the @authors tag. See the copyright.txt in the
 * distribution for a full listing of individual contributors.
 *
 * 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 org.jboss.as.quickstarts.wshelloworld;

import java.util.ArrayList;
import java.util.List;

import javax.jws.WebService;

/**
 * The implementation of the HelloWorld JAX-WS Web Service.
 * 
 * @author lnewson@redhat.com
 */
@WebService(serviceName = "HelloWorldService", portName = "HelloWorld", name = "HelloWorld", endpointInterface = "org.jboss.as.quickstarts.wshelloworld.HelloWorldService", targetNamespace = "http://www.jboss.org/jbossas/quickstarts/wshelloworld/HelloWorld")
public class HelloWorldServiceImpl implements HelloWorldService {

    @Override
    public String sayHello() {
        return "Hello World!";
    }

    @Override
    public String sayHelloToName(final String name) {

        /* Create a list with just the one value */
        final List<String> names = new ArrayList<String>();
        names.add(name);

        return sayHelloToNames(names);
    }

    @Override
    public String sayHelloToNames(final List<String> names) {
        return "Hello " + createNameListString(names);
    }

    /**
     * Creates a list of names separated by commas or an and symbol if its the last separation. This is then used to say hello to
     * the list of names.
     * 
     * i.e. if the input was {John, Mary, Luke} the output would be John, Mary & Luke
     * 
     * @param names A list of names
     * @return The list of names separated as described above.
     */
    private String createNameListString(final List<String> names) {

        /*
         * If the list is null or empty then assume the call was anonymous.
         */
        if (names == null || names.isEmpty()) {
            return "Anonymous!";
        }

        final StringBuilder nameBuilder = new StringBuilder();
        for (int i = 0; i < names.size(); i++) {

            /*
             * Add the separator if its not the first string or the last separator since that should be an and (&) symbol.
             */
            if (i != 0 && i != names.size() - 1)
                nameBuilder.append(", ");
            else if (i != 0 && i == names.size() - 1)
                nameBuilder.append(" & ");

            nameBuilder.append(names.get(i));
        }

        nameBuilder.append("!");

        return nameBuilder.toString();
    }
}
