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The Adobe Experience Manager SDK
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/*************************************************************************
 *
 * ADOBE CONFIDENTIAL
 * __________________
 *
 *  Copyright 2016 Adobe Systems Incorporated
 *  All Rights Reserved.
 *
 * NOTICE:  All information contained herein is, and remains
 * the property of Adobe Systems Incorporated and its suppliers,
 * if any.  The intellectual and technical concepts contained
 * herein are proprietary to Adobe Systems Incorporated and its
 * suppliers and are protected by trade secret or copyright law.
 * Dissemination of this information or reproduction of this material
 * is strictly forbidden unless prior written permission is obtained
 * from Adobe Systems Incorporated.
 **************************************************************************/
package com.adobe.granite.haf.api;

import org.apache.sling.api.resource.Resource;
import org.apache.sling.servlets.post.Modification;
import org.osgi.annotation.versioning.ProviderType;

/**
 * An interface for creating ApiResponse instances.  To create an ApiResponseBuilder instance use
 * ApiResponseBuilderFactory.createBuilder()
 */
@ProviderType
public interface ApiResponseBuilder {
    /**
     * Set the HTTP status
     * @param code The status code
     * @param message The status message
     * @return This ApiResponseBuilder instance
     */
    ApiResponseBuilder setStatus(Integer code, String message);

    /**
     * Set an HTTP header to be used in the response.  If a header with this key already exists it will be replaced
     * with the value specified in this method.
     * @param key The HTTP header name
     * @param value The HTTP header value
     * @return This ApiResponseBuilder instance
     */
    ApiResponseBuilder withHeader(String key, String value);

    /**
     * Set an HTTP header with multiple values.  If a header with this key already exists it will be replaced with
     * the values specified in this method.
     * @param key The HTTP header name
     * @param values The HTTP header values
     * @return This ApiResponseBuilder instance
     */
    ApiResponseBuilder withHeader(String key, String[] values);

    /**
     * Set an entity to be used as the response body.  The entity must be a Resource that can be interpreted by the
     * HTTP API Framework
     * @param entity A resource to be used as the entity
     * @return This ApiResponseBuilder instance
     */
    ApiResponseBuilder setEntity(Resource entity);

    /**
     * Set the body to be returned in the response.  The body must be an instance of CharSequence or a byte[]
     * @param body An instance of CharSequence or a byte[] to be used in the body of the response.
     * @return This ApiResponseBuilder instance
     */
    ApiResponseBuilder setBody(Object body);

    /**
     * Set the content type of the body.
     * @param contentType The content type.
     * @return This ApiResponseBuilder instance.
     */
    ApiResponseBuilder setContentType(String contentType);

    /**
     * Add a Modification to be returned in the changes section of the response.
     * @param modification The Modification to be added.
     * @return This ApiResponseBuilder
     */
    ApiResponseBuilder withChange(Modification modification);

    /**
     * Build the ApiResponse instance with the values specified in this ApiRespoonseBuilder.
     * @return The ApiResponse instance
     */
    ApiResponse build();
}