/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.uima.ruta.cde.ui;

import org.apache.commons.lang3.StringUtils;
import org.apache.uima.ruta.cde.SimpleRutaRuleConstraint;
import org.apache.uima.ruta.cde.utils.ConstraintData;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.swt.graphics.Image;

public class ConstraintSelectTableLabelProvider implements ITableLabelProvider {

  public void addListener(ILabelProviderListener arg0) {
  }

  public void dispose() {
  }

  public boolean isLabelProperty(Object arg0, String arg1) {
    return false;
  }

  public void removeListener(ILabelProviderListener arg0) {
  }

  public Image getColumnImage(Object element, int columnIndex) {
    return null;
  }

  public String getColumnText(Object element, int columnIndex) {
    if (element instanceof ConstraintData) {
      ConstraintData data = (ConstraintData) element;
      if (columnIndex == 0) {
        if (StringUtils.isBlank(data.getDescription())
                && data.getConstraint() instanceof SimpleRutaRuleConstraint) {
          SimpleRutaRuleConstraint c = (SimpleRutaRuleConstraint) data.getConstraint();
          return c.getData();
        } else {
          return data.getDescription();
        }
      } else if (columnIndex == 1) {
        return String.valueOf(data.getWeight());
      }
    }
    return null;
  }

}
