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Exchange Web Services (EWS) Java API
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/*
 * The MIT License
 * Copyright (c) 2012 Microsoft Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package microsoft.exchange.webservices.data.property.definition;

import microsoft.exchange.webservices.data.core.EwsServiceXmlReader;
import microsoft.exchange.webservices.data.core.EwsServiceXmlWriter;
import microsoft.exchange.webservices.data.core.XmlAttributeNames;
import microsoft.exchange.webservices.data.core.XmlElementNames;
import microsoft.exchange.webservices.data.core.service.schema.ServiceObjectSchema;
import microsoft.exchange.webservices.data.core.enumeration.misc.ExchangeVersion;
import microsoft.exchange.webservices.data.core.enumeration.misc.XmlNamespace;
import microsoft.exchange.webservices.data.core.exception.service.local.ServiceXmlSerializationException;
import microsoft.exchange.webservices.data.misc.OutParam;

import javax.xml.stream.XMLStreamException;

/**
 * Represents the base class for all property definitions.
 */
public abstract class PropertyDefinitionBase {

  /**
   * Initializes a new instance.
   */
  protected PropertyDefinitionBase() {
    super();
  }

  /**
   * Tries to load from XML.
   *
   * @param reader             The reader.
   * @param propertyDefinition The property definition.
   * @return True if property was loaded.
   * @throws Exception the exception
   */
  public static boolean tryLoadFromXml(EwsServiceXmlReader reader,
      OutParam propertyDefinition)
      throws Exception {
    String strLocalName = reader.getLocalName();
    if (strLocalName.equals(XmlElementNames.FieldURI)) {
      PropertyDefinitionBase p = ServiceObjectSchema
          .findPropertyDefinition(reader.readAttributeValue(XmlAttributeNames.FieldURI));
      propertyDefinition.setParam(p);
      return true;
    } else if (strLocalName.equals(XmlElementNames.IndexedFieldURI)) {
      reader.skipCurrentElement();
      return true;
    } else if (strLocalName.equals(XmlElementNames.ExtendedFieldURI)) {
      ExtendedPropertyDefinition p = new ExtendedPropertyDefinition();
      p.loadFromXml(reader);
      propertyDefinition.setParam(p);
      return true;
    } else {
      return false;
    }

  }

  /**
   * Gets the name of the XML element.
   *
   * @return XML element name.
   */
  protected abstract String getXmlElementName();

  /**
   * Writes the attribute to XML.
   *
   * @param writer The writer.
   * @throws ServiceXmlSerializationException the service xml serialization exception
   */
  protected abstract void writeAttributesToXml(EwsServiceXmlWriter writer)
      throws ServiceXmlSerializationException;

  /**
   * Gets the minimum Exchange version that supports this property.
   *
   * @return The version.
   */
  public abstract ExchangeVersion getVersion();

  /**
   * Gets the property definition's printable name.
   *
   * @return The property definition's printable name.
   */
  public abstract String getPrintableName();

  /**
   * Gets the type of the property.
   */
  public abstract Class getType();

  /**
   * Writes to XML.
   *
   * @param writer The writer.
   * @throws XMLStreamException the XML stream exception
   * @throws ServiceXmlSerializationException the service xml serialization exception
   */
  public void writeToXml(EwsServiceXmlWriter writer)
      throws XMLStreamException, ServiceXmlSerializationException {
    writer.writeStartElement(XmlNamespace.Types, this.getXmlElementName());
    this.writeAttributesToXml(writer);
    writer.writeEndElement();
  }

  /*
   * (non-Javadoc)
   *
   * @see java.lang.Object#toString()
   */
  @Override
  /**
   * Returns a string that represents the current object.
   * @return A string that represents the current object.
   */
  public String toString() {
    return this.getPrintableName();
  }
}