/**
 * Copyright 2017 Red Hat, Inc, and individual contributors.
 *
 * 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 io.smallrye.openapi.api.models;

import java.util.LinkedHashMap;
import java.util.Map;

import org.eclipse.microprofile.openapi.models.Extensible;

/**
 * Implementation of the {@link Extensible} OpenAPI model interface.  Base class for many of the
 * OpenAPI models.
 * @author eric.wittmann@gmail.com
 */
public abstract class ExtensibleImpl<T extends Extensible<T>> implements Extensible<T>, ModelImpl {

    private Map<String, Object> extensions;

    /**
     * @see org.eclipse.microprofile.openapi.models.Extensible#getExtensions()
     */
    @Override
    public Map<String, Object> getExtensions() {
        return this.extensions;
    }

    /**
     * @see org.eclipse.microprofile.openapi.models.Extensible#addExtension(java.lang.String, java.lang.Object)
     */
    @SuppressWarnings("unchecked")
    @Override
    public T addExtension(String name, Object value) {
        if (value == null) { return (T) this; }
        if (extensions == null) {
            this.extensions = new LinkedHashMap<>();
        }
        this.extensions.put(name, value);
        return (T) this;
    }

    /**
     * @see org.eclipse.microprofile.openapi.models.Extensible#removeExtension(java.lang.String)
     */
    @Override
    public void removeExtension(String name) {
        if (this.extensions != null) {
            this.extensions.remove(name);
        }
    }

    /**
     * @see org.eclipse.microprofile.openapi.models.Extensible#setExtensions(java.util.Map)
     */
    @Override
    public void setExtensions(Map<String, Object> extensions) {
        this.extensions = extensions;
    }

}
