AtompubVersionTransforms.java

/* Copyright (c) 2008 Google Inc.
 *
 * 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 com.google.gdata.model.transforms.atompub;

import com.google.gdata.client.Service;
import com.google.gdata.model.ElementKey;
import com.google.gdata.model.MetadataContext;
import com.google.gdata.model.MetadataRegistry;
import com.google.gdata.model.QName;
import com.google.gdata.model.atom.Source;
import com.google.gdata.model.atompub.Accept;
import com.google.gdata.model.atompub.Categories;
import com.google.gdata.model.atompub.Collection;
import com.google.gdata.model.atompub.Draft;
import com.google.gdata.model.atompub.Edited;
import com.google.gdata.model.atompub.Control;
import com.google.gdata.model.atompub.ServiceDocument;
import com.google.gdata.model.atompub.Workspace;
import com.google.gdata.util.Namespaces;

/**
 * Transforms for atompub elements based on version information.
 * 
 * 
 */
public class AtompubVersionTransforms {

  private static final MetadataContext V1_CONTEXT =
      MetadataContext.forVersion(Service.Versions.V1);
  
  public static void addTransforms(MetadataRegistry registry) {
    addAtompubTransforms(registry,
        Accept.KEY,
        Categories.KEY,
        Collection.KEY,
        Draft.KEY,
        Edited.KEY,
        Control.KEY,
        ServiceDocument.KEY,
        Workspace.KEY);

    // Switch visibility of title attribute and element in V1.
    registry.build(Workspace.KEY, Workspace.TITLE, V1_CONTEXT)
        .setVisible(true);
    registry.build(Workspace.KEY, Source.TITLE, V1_CONTEXT)
        .setVisible(false);
    
    registry.build(Collection.KEY, Collection.TITLE, V1_CONTEXT)
        .setVisible(true);
    registry.build(Collection.KEY, Source.TITLE, V1_CONTEXT)
        .setVisible(false);
  }

  private static void addAtompubTransforms(MetadataRegistry registry,
      ElementKey<?, ?>... keys) {
    for (ElementKey<?, ?> key : keys) {
      addAtompubTransform(registry, key);
    }
  }
  
  private static void addAtompubTransform(MetadataRegistry registry,
      ElementKey<?, ?> key) {
    registry.build(key, V1_CONTEXT).setName(
        new QName(Namespaces.atomPubDraftNs, key.getId().getLocalName()));
  }
}