annis.gui.converter.TreeSetConverter.java Source code

Introduction

Here is the source code for annis.gui.converter.TreeSetConverter.java

Source

/*
 * Copyright 2014 Corpuslinguistic working group Humboldt University Berlin.
 *
 * 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 annis.gui.converter;

import annis.CaseSensitiveOrder;
import com.google.common.base.Preconditions;
import com.vaadin.data.util.converter.Converter;
import java.util.Collection;
import java.util.Locale;
import java.util.TreeSet;

/**
 *
 * @author Thomas Krause <krauseto@hu-berlin.de>
 */
public class TreeSetConverter implements Converter<Object, TreeSet> {
    @Override
    public TreeSet convertToModel(Object value, Class<? extends TreeSet> targetType, Locale locale)
            throws ConversionException {
        TreeSet result = new TreeSet(CaseSensitiveOrder.INSTANCE);
        if (value instanceof Collection) {
            result.addAll((Collection) value);
            Preconditions.checkState(result.size() == ((Collection) value).size(),
                    "Collection which was used with the TreeSetConverter had duplicate entries.");
        } else {
            result.add(value);
        }
        return result;
    }

    @Override
    public Object convertToPresentation(TreeSet value, Class<? extends Object> targetType, Locale locale)
            throws ConversionException {
        return value;
    }

    @Override
    public Class<TreeSet> getModelType() {
        return TreeSet.class;
    }

    @Override
    public Class<Object> getPresentationType() {
        return Object.class;
    }

}