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Dashbuilder Renderer for the Lienzo 2 API

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/*
 * Copyright 2014 Red Hat, Inc. and/or its affiliates.
 *
 * 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.dashbuilder.renderer.lienzo.client;

import javax.enterprise.context.Dependent;
import javax.inject.Inject;

import org.dashbuilder.dataset.ColumnType;
import org.dashbuilder.dataset.DataSetLookupConstraints;
import org.dashbuilder.displayer.DisplayerAttributeDef;
import org.dashbuilder.displayer.DisplayerAttributeGroupDef;
import org.dashbuilder.displayer.DisplayerConstraints;

@Dependent
public class LienzoPieChartDisplayer extends LienzoDisplayer {

    public interface View extends LienzoDisplayer.View {

    }

    private View view;

    public LienzoPieChartDisplayer() {
        this(new LienzoPieChartDisplayerView());
    }

    @Inject
    public LienzoPieChartDisplayer(View view) {
        this.view = view;
        this.view.init(this);
    }

    @Override
    public View getView() {
        return view;
    }

    @Override
    public DisplayerConstraints createDisplayerConstraints() {
        DataSetLookupConstraints lookupConstraints = new DataSetLookupConstraints()
                .setGroupRequired(true)
                .setGroupColumn(true)
                .setMaxColumns(2)
                .setMinColumns(2)
                .setExtraColumnsAllowed(false)
                .setGroupsTitle(getView().getGroupsTitle())
                .setColumnsTitle(getView().getColumnsTitle())
                .setColumnTypes(new ColumnType[] {
                        ColumnType.LABEL,
                        ColumnType.NUMBER});

        return new DisplayerConstraints(lookupConstraints)
                .supportsAttribute(DisplayerAttributeDef.TYPE)
                .supportsAttribute(DisplayerAttributeDef.RENDERER)
                .supportsAttribute(DisplayerAttributeGroupDef.COLUMNS_GROUP)
                .supportsAttribute(DisplayerAttributeGroupDef.FILTER_GROUP)
                .supportsAttribute(DisplayerAttributeGroupDef.REFRESH_GROUP)
                .supportsAttribute(DisplayerAttributeGroupDef.GENERAL_GROUP)
                .supportsAttribute(DisplayerAttributeGroupDef.CHART_GROUP );
    }
}