/**
    *
    * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com>
    *
    * ====================================================================
    * 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.jclouds.vcloud.binders;
  
  import static com.google.common.base.Preconditions.checkArgument;
  import static com.google.common.base.Preconditions.checkNotNull;
  import static org.jclouds.vcloud.reference.VCloudConstants.PROPERTY_VCLOUD_XML_NAMESPACE;
  import static org.jclouds.vcloud.reference.VCloudConstants.PROPERTY_VCLOUD_XML_SCHEMA;
  
  import java.util.Properties;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import org.jclouds.cim.ResourceAllocationSettingData.ResourceType;
  import org.jclouds.http.HttpRequest;
  import org.jclouds.rest.binders.BindToStringPayload;
  
  import com.google.common.base.Throwables;
  import com.google.inject.Inject;
  import com.jamesmurty.utils.XMLBuilder;
  
  /**
   * 
   * @author Adrian Cole
   * 
   */
  @Singleton
  public class BindCPUCountToXmlPayload extends BindToStringPayload {
     protected final String ns;
     protected final String schema;
  
     @Inject
     public BindCPUCountToXmlPayload(BindToStringPayload stringBinder, @Named(PROPERTY_VCLOUD_XML_NAMESPACE) String ns,
           @Named(PROPERTY_VCLOUD_XML_SCHEMA) String schema) {
        this.ns = ns;
        this.schema = schema;
     }
  
     private static final String RESOURCE_ALLOCATION_NS = "http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData";
  
     @Override
     public <R extends HttpRequest> R bindToRequest(R request, Object payload) {
        checkArgument(checkNotNull(payload, "cpuCount") instanceof Integer, "this binder is only valid for Integers!");
        Integer cpuCount = Integer.class.cast(payload);
        XMLBuilder cpuItem;
        try {
           cpuItem = XMLBuilder.create("Item").a("xmlns", ns).a("xmlns:rasd", RESOURCE_ALLOCATION_NS);
           cpuItem.e("rasd:AllocationUnits").t("hertz * 10^6");
           cpuItem.e("rasd:Description").t("Number of Virtual CPUs");
           cpuItem.e("rasd:ElementName").t(cpuCount.toString() + " virtual CPU(s)");
           cpuItem.e("rasd:InstanceID").t("4");
           cpuItem.e("rasd:ResourceType").t(ResourceType.PROCESSOR.value());
           cpuItem.e("rasd:VirtualQuantity").t(cpuCount.toString());
           cpuItem.e("rasd:Weight").t("0");
           Properties outputProperties = new Properties();
           outputProperties.put(javax.xml.transform.OutputKeys.OMIT_XML_DECLARATION, "yes");
           request = super.bindToRequest(request, cpuItem.asString(outputProperties));
        } catch (Exception e) {
           Throwables.propagate(e);
        }
        return request;
     }
  
  }