/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * 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.argeo.cms.ui.jcr;
  
  import java.text.DateFormat;
  import java.text.SimpleDateFormat;
  
  import javax.jcr.Property;
  import javax.jcr.PropertyType;
  import javax.jcr.RepositoryException;
  import javax.jcr.Value;
  
  import org.argeo.cms.ui.CmsConstants;
  import org.argeo.eclipse.ui.EclipseUiException;
  import org.argeo.jcr.JcrUtils;
  import org.eclipse.jface.viewers.ColumnLabelProvider;
  import org.eclipse.jface.viewers.ViewerCell;
  
  /** Default basic label provider for a given JCR Node's properties */
  public class PropertyLabelProvider extends ColumnLabelProvider {
  	private static final long serialVersionUID = -5405794508731390147L;
  
  	// To be able to change column order easily
  	public static final int COLUMN_PROPERTY = 0;
  	public static final int COLUMN_VALUE = 1;
  	public static final int COLUMN_TYPE = 2;
  	public static final int COLUMN_ATTRIBUTES = 3;
  
  	// Utils
  	protected DateFormat timeFormatter = new SimpleDateFormat(CmsConstants.DATE_TIME_FORMAT);
  
  	public void update(ViewerCell cell) {
  		Object element = cell.getElement();
  		cell.setText(getColumnText(element, cell.getColumnIndex()));
  	}
  
  	public String getColumnText(Object element, int columnIndex) {
  		try {
  			if (element instanceof Property) {
  				Property prop = (Property) element;
  				if (prop.isMultiple()) {
  					switch (columnIndex) {
  					case COLUMN_PROPERTY:
  						return prop.getName();
  					case COLUMN_VALUE:
  						// Corresponding values are listed on children
  						return "";
  					case COLUMN_TYPE:
  						return JcrBrowserUtils.getPropertyTypeAsString(prop);
  					case COLUMN_ATTRIBUTES:
  						return JcrUtils.getPropertyDefinitionAsString(prop);
  					}
  				} else {
  					switch (columnIndex) {
  					case COLUMN_PROPERTY:
  						return prop.getName();
  					case COLUMN_VALUE:
  						return formatValueAsString(prop.getValue());
  					case COLUMN_TYPE:
  						return JcrBrowserUtils.getPropertyTypeAsString(prop);
  					case COLUMN_ATTRIBUTES:
  						return JcrUtils.getPropertyDefinitionAsString(prop);
  					}
  				}
  			} else if (element instanceof Value) {
  				Value val = (Value) element;
  				switch (columnIndex) {
  				case COLUMN_PROPERTY:
  					// Nothing to show
  					return "";
  				case COLUMN_VALUE:
  					return formatValueAsString(val);
  				case COLUMN_TYPE:
  					// listed on the parent
  					return "";
  				case COLUMN_ATTRIBUTES:
  					// Corresponding attributes are listed on the parent
  					return "";
  				}
  			}
  		} catch (RepositoryException re) {
  			throw new EclipseUiException("Cannot retrieve prop value on " + element, re);
  		}
  		return null;
  	}
  
 	private String formatValueAsString(Value value) {
 		// TODO enhance this method
 		try {
 			String strValue;
 
 			if (value.getType() == PropertyType.BINARY)
 				strValue = "<binary>";
 			else if (value.getType() == PropertyType.DATE)
 				strValue = timeFormatter.format(value.getDate().getTime());
 			else
 				strValue = value.getString();
 			return strValue;
 		} catch (RepositoryException e) {
 			throw new EclipseUiException("unexpected error while formatting value", e);
 		}
 	}
 }