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/**
 * Legato is a configurable, lightweight web mapping client that can be
 * easily embedded into web pages and portals, CMS and individual web
 * applications. Legato is implemented in JavaScript and based on the
 * popular open source library OpenLayers.
 *
 * Copyright (C) 2010  disy Informationssysteme GmbH, http://www.disy.net
 *
 * 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 .
 */

package net.disy.ogc.wps.v_1_0_0;

import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Locale;

import net.opengis.ows.v_1_1_0.MetadataType;
import net.opengis.ows.v_1_1_0.OperationsMetadata;
import net.opengis.ows.v_1_1_0.ServiceIdentification;
import net.opengis.ows.v_1_1_0.ServiceProvider;
import net.opengis.wps.v_1_0_0.GetCapabilities;
import net.opengis.wps.v_1_0_0.Languages;
import net.opengis.wps.v_1_0_0.LanguagesType;
import net.opengis.wps.v_1_0_0.ProcessBriefType;
import net.opengis.wps.v_1_0_0.ProcessDescriptionType;
import net.opengis.wps.v_1_0_0.ProcessOfferings;
import net.opengis.wps.v_1_0_0.WPSCapabilitiesType;

public class DefaultGetCapabilitiesService implements GetCapabilitiesService {
  private WpsProcessRegistry wpsProcessRegistry;

  public WpsProcessRegistry getWpsProcessRegistry() {
    return wpsProcessRegistry;
  }

  public void setWpsProcessRegistry(WpsProcessRegistry wpsProcessRegistry) {
    this.wpsProcessRegistry = wpsProcessRegistry;
  }

  private ServiceIdentification serviceIdentification;

  public ServiceIdentification getServiceIdentification() {
    return serviceIdentification;
  }

  public void setServiceIdentification(ServiceIdentification serviceIdentification) {
    this.serviceIdentification = serviceIdentification;
  }

  private ServiceProvider serviceProvider;

  public ServiceProvider getServiceProvider() {
    return serviceProvider;
  }

  public void setServiceProvider(ServiceProvider serviceProvider) {
    this.serviceProvider = serviceProvider;
  }

  private Locale defaultLanguage = Locale.ENGLISH;

  public Locale getDefaultLanguage() {
    return defaultLanguage;
  }

  public void setDefaultLanguage(Locale defaultLanguage) {
    this.defaultLanguage = defaultLanguage;
  }

  private Collection supportedLanguages = Collections.singletonList(Locale.ENGLISH);

  public Collection getSupportedLanguages() {
    return supportedLanguages;
  }

  public void setSupportedLanguages(Collection supportedLanguages) {
    this.supportedLanguages = supportedLanguages;
  }

  @Override
  public WPSCapabilitiesType execute(GetCapabilities input) {

    final WPSCapabilitiesType wpsCapabilities = new WPSCapabilitiesType();

    wpsCapabilities.setVersion("1.0.0"); //$NON-NLS-1$
    wpsCapabilities.setService("WPS"); //$NON-NLS-1$

    final ServiceIdentification currentServiceIdentification = getServiceIdentification();
    if (currentServiceIdentification != null) {
      wpsCapabilities.setServiceIdentification(currentServiceIdentification);
    }

    final ServiceProvider currentServiceProvider = getServiceProvider();
    if (currentServiceProvider != null) {
      wpsCapabilities.setServiceProvider(currentServiceProvider);
    }

    wpsCapabilities.setOperationsMetadata(getOperationsMetadata());

    wpsCapabilities.setProcessOfferings(getProcessOfferings());

    wpsCapabilities.setLanguages(getLanguages());

    if (getDefaultLanguage() != null) {
      wpsCapabilities.setLang(getDefaultLanguage().toString());
    }
    return wpsCapabilities;
  }

  private OperationsMetadata operationsMetadata;

  public OperationsMetadata getOperationsMetadata() {
    return operationsMetadata;
  }

  public void setOperationsMetadata(OperationsMetadata operationsMetadata) {
    this.operationsMetadata = operationsMetadata;
  }

  private ProcessOfferings getProcessOfferings() {
    final ProcessOfferings processOfferings = new ProcessOfferings();
    for (WpsProcess wpsProcess : getWpsProcessRegistry().getProcesses()) {
      final ProcessDescriptionType processDescription = wpsProcess.getProcessDescription();

      final ProcessBriefType briefProcessDescription = new ProcessBriefType();

      if (processDescription.getIdentifier() != null) {
        briefProcessDescription.setIdentifier(processDescription.getIdentifier());
      }

      if (processDescription.getTitle() != null) {
        briefProcessDescription.setTitle(processDescription.getTitle());
      }

      if (processDescription.getAbstract() != null) {
        briefProcessDescription.setAbstract(processDescription.getAbstract());
      }

      final List metadata = processDescription.getMetadata();
      if (!metadata.isEmpty()) {
        briefProcessDescription.getMetadata().addAll(metadata);
      }

      if (!processDescription.getProfile().isEmpty()) {
        briefProcessDescription.getProfile().addAll(processDescription.getProfile());
      }

      if (processDescription.getWSDL() != null) {
        briefProcessDescription.setWSDL(processDescription.getWSDL());
      }

      if (processDescription.getProcessVersion() != null) {
        briefProcessDescription.setProcessVersion(processDescription.getProcessVersion());
      }

      processOfferings.getProcess().add(briefProcessDescription);
    }
    return processOfferings;
  }

  private Languages getLanguages() {
    final Languages languages = new Languages();

    if (getDefaultLanguage() != null) {
      Languages.Default newDefaultLanguage = new Languages.Default();
      newDefaultLanguage.setLanguage(getDefaultLanguage().toString());
      languages.setDefault(newDefaultLanguage);
    }

    if (getSupportedLanguages() != null) {
      final LanguagesType newSupportedLanguages = new LanguagesType();
      for (Locale locale : getSupportedLanguages()) {
        newSupportedLanguages.getLanguage().add(locale.toString());
      }
      languages.setSupported(newSupportedLanguages);
    }

    return languages;
  }

}