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Param.java
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/*
* Copyright 2015 Netflix, 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 feign;
import java.lang.annotation.Retention;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* A named template parameter applied to {@link Headers}, {@linkplain RequestLine} or {@linkplain
* Body}
*/
@Retention(RUNTIME)
@java.lang.annotation.Target(PARAMETER)
public @interface Param {
/**
* The name of the template parameter.
*/
String value();
/**
* How to expand the value of this parameter, if {@link ToStringExpander} isn't adequate.
*/
Class<? extends Expander> expander() default ToStringExpander.class;
/**
* Specifies whether argument is already encoded
* The value is ignored for headers (headers are never encoded)
*
* @see QueryMap#encoded
*/
boolean encoded() default false;
interface Expander {
/**
* Expands the value into a string. Does not accept or return null.
*/
String expand(Object value);
}
final class ToStringExpander implements Expander {
@Override
public String expand(Object value) {
return value.toString();
}
}
}