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Param.java
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/**
* Copyright 2012-2019 The Feign Authors
*
* 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;
/**
* {@code encoded} has been maintained for backward compatibility and should be deprecated. We no
* longer need it as values that are already pct-encoded should be identified during expansion and
* passed through without any changes
*
* @see QueryMap#encoded
* @deprecated
*/
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();
}
}
}