impl.org.controlsfx.collections.MappingChange Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of controlsfx Show documentation
High quality UI controls and other tools to complement the core JavaFX distribution
There is a newer version: 11.2.1
/*
 * Copyright (c) 2018, ControlsFX
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *     * Neither the name of ControlsFX, any associated website, nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL CONTROLSFX BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package impl.org.controlsfx.collections;

import java.util.AbstractList;
import java.util.List;

import javafx.collections.ListChangeListener.Change;
import javafx.collections.ObservableList;

public final class MappingChange extends Change {
    
    private final MappingChange.Map map;
    private final Change original;
    private List removed;

    public interface Map {
        F map(E original);
    }

    public MappingChange(Change original, MappingChange.Map map, ObservableList list) {
        super(list);
        this.original = original;
        this.map = map;
    }

    @Override
    public boolean next() {
        return original.next();
    }

    @Override
    public void reset() {
        original.reset();
    }

    @Override
    public int getFrom() {
        return original.getFrom();
    }

    @Override
    public int getTo() {
        return original.getTo();
    }

    @Override
    public List getRemoved() {
        if (removed == null) {
            removed = new AbstractList<>() {

                @Override
                public F get(int index) {
                    return map.map(original.getRemoved().get(index));
                }

                @Override
                public int size() {
                    return original.getRemovedSize();
                }
            };
        }
        return removed;
    }

    @Override
    protected int[] getPermutation() {
        return new int[0];
    }

    @Override
    public boolean wasPermutated() {
        return original.wasPermutated();
    }

    @Override
    public boolean wasUpdated() {
        return original.wasUpdated();
    }

    @Override
    public int getPermutation(int i) {
        return original.getPermutation(i);
    }

    @Override
    public String toString() {

        int size = 0, pos = 0, posToEnd = 0;
        
        while (next()) {
            posToEnd++;
        }

        reset();
        while (next()) {
            size++;
        }
        reset();

        StringBuilder b = new StringBuilder();
        b.append("{ ");
        while (next()) {
            if (wasPermutated()) {
                b.append(ChangeHelper.permChangeToString(getPermutation()));
            } else if (wasUpdated()) {
                b.append(ChangeHelper.updateChangeToString(getFrom(), getTo()));
            } else {
                b.append(ChangeHelper.addRemoveChangeToString(getFrom(), getTo(), getList(), getRemoved()));
            }
            if (pos != size) {
                b.append(", ");
            }
        }
        b.append(" }");

        reset();
        pos = size - posToEnd;
        while (pos-- > 0) {
            next();
        }

        return b.toString();
    }

}