AbstractContainerShape.java

/*
 * Copyright 2017 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.kie.workbench.common.stunner.core.client.shape.impl;

import java.util.LinkedList;
import java.util.List;

import org.kie.workbench.common.stunner.core.client.shape.HasChildren;
import org.kie.workbench.common.stunner.core.client.shape.Shape;

public abstract class AbstractContainerShape<V extends HasChildren, S extends Shape<?>>
        implements
        HasChildren<S> {

    private final List<S> children = new LinkedList<S>();

    protected abstract V getCompositeShapeView();

    @Override
    @SuppressWarnings("unchecked")
    public void addChild(final S child,
                         final Layout layout) {
        final V view = getCompositeShapeView();
        children.add(child);
        view.addChild(child.getShapeView(),
                      layout);
    }

    @Override
    @SuppressWarnings("unchecked")
    public void removeChild(final S child) {
        final V view = getCompositeShapeView();
        children.remove(child);
        view.removeChild(child.getShapeView());
    }

    @Override
    public Iterable<S> getChildren() {
        return children;
    }
}