001/**
002 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
003 *   This file is part of the LDP4j Project:
004 *     http://www.ldp4j.org/
005 *
006 *   Center for Open Middleware
007 *     http://www.centeropenmiddleware.com/
008 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
009 *   Copyright (C) 2014 Center for Open Middleware.
010 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
011 *   Licensed under the Apache License, Version 2.0 (the "License");
012 *   you may not use this file except in compliance with the License.
013 *   You may obtain a copy of the License at
014 *
015 *             http://www.apache.org/licenses/LICENSE-2.0
016 *
017 *   Unless required by applicable law or agreed to in writing, software
018 *   distributed under the License is distributed on an "AS IS" BASIS,
019 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
020 *   See the License for the specific language governing permissions and
021 *   limitations under the License.
022 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
023 *   Artifact    : org.ldp4j.framework:ldp4j-application-api:0.2.0
024 *   Bundle      : ldp4j-application-api-0.2.0.jar
025 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
026 */
027package org.ldp4j.application.ext;
028
029import java.util.Collections;
030import java.util.List;
031import java.util.Set;
032
033/**
034 * Provides a programmatic mechanism for an LDP4j application to specify the
035 * configuration parameters for the <b>LDP4j Application Engine</b>. <br/>
036 *
037 * This class is meant to be extended (refined) to also include specific
038 * configuration requirements of LDP4j applications.
039 */
040public class Configuration {
041
042  private static final class NullNamespaces implements Namespaces {
043    @Override
044    public List<String> getPrefixes(String namespaceURI) {
045      return Collections.emptyList();
046    }
047
048    @Override
049    public String getPrefix(String namespaceURI) {
050      return null;
051    }
052
053    @Override
054    public String getNamespaceURI(String prefix) {
055      return null;
056    }
057
058    @Override
059    public Set<String> getDeclaredPrefixes() {
060      return Collections.emptySet();
061    }
062  }
063
064  /**
065   * Get the namespace declarations of the application.
066   *
067   * @return the namespaces of the application
068   */
069  public Namespaces namespaces() {
070    return new NullNamespaces();
071  }
072
073}