/*
 * Copyright (C) 2014 Square, Inc.
 *
 * 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 retrofit.http;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * Named key/value pairs for a form-encoded request.
 * <p>
 * Field values may be {@code null} which will omit them from the request body.
 * <p>
 * Simple Example:
 * <pre>
 * &#64;FormUrlEncoded
 * &#64;POST("/things")
 * void things(@FieldMap Map<String, String> fields);
 * }
 * </pre>
 * Calling with {@code foo.things(ImmutableMap.of("foo", "bar", "kit", "kat")} yields a request
 * body of {@code foo=bar&kit=kat}.
 *
 * @see FormUrlEncoded
 * @see Field
 */
@Documented
@Target(PARAMETER)
@Retention(RUNTIME)
public @interface FieldMap {
}
