uk.ac.cam.cl.dtg.picky.client.binding.EntryTreeBinding.java Source code

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Here is the source code for uk.ac.cam.cl.dtg.picky.client.binding.EntryTreeBinding.java

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package uk.ac.cam.cl.dtg.picky.client.binding;

/*
 * #%L
 * Picky
 * %%
 * Copyright (C) 2015 Daniel Hintze <dh526@cl.cam.ac.uk>
 * %%
 * 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.
 * #L%
 */

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.stream.Collectors;

import javafx.scene.control.CheckBoxTreeItem;
import uk.ac.cam.cl.dtg.picky.dataset.FileEntry;

import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.ListMultimap;

public class EntryTreeBinding extends AsyncBinding<CheckBoxTreeItem<String>> {

    private FileSelectionBinding fileSelectionBinding;

    private List<FileEntry> fileList;

    public EntryTreeBinding(FileSelectionBinding fileSelectionBinding) {
        super(fileSelectionBinding);

        this.fileSelectionBinding = fileSelectionBinding;
    }

    @Override
    protected CheckBoxTreeItem<String> computeValue() {
        fileList = fileSelectionBinding.get();

        return super.computeValue();
    }

    @Override
    protected CheckBoxTreeItem<String> doCompute() throws Exception {
        if (fileList != null && !fileList.isEmpty()) {
            ListMultimap<String, String> entrySelectionOptions = ArrayListMultimap.create();

            fileList.stream().flatMap(fileEntry -> fileEntry.getBlocks().stream())
                    .flatMap(block -> block.getAttributes().entrySet().stream())
                    .filter(e -> e.getValue() instanceof String)
                    .forEach(e -> entrySelectionOptions.put(e.getKey(), (String) e.getValue()));
            return toTree(entrySelectionOptions);
        } else {
            return null;
        }
    }

    private CheckBoxTreeItem<String> toTree(ListMultimap<String, String> selection) {
        CheckBoxTreeItem<String> root = new CheckBoxTreeItem<String>("root");

        for (String key : selection.keySet()) {
            List<String> options = new ArrayList<>(new HashSet<>(selection.get(key)));
            Collections.sort(options);

            CheckBoxTreeItem<String> keyRoot = new CheckBoxTreeItem<String>(key);
            keyRoot.setExpanded(true);

            List<CheckBoxTreeItem<String>> nodes = options.stream().map(o -> new CheckBoxTreeItem<String>(o))
                    .collect(Collectors.toList());
            keyRoot.getChildren().addAll(nodes);
            root.getChildren().add(keyRoot);
        }

        return root;
    }

}