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Param.java
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/*
* Copyright © 2012 The Feign Authors (feign@commonhaus.dev)
*
* 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 static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Retention;
/**
* A named template parameter applied to {@link Headers}, {@linkplain RequestLine}, {@linkplain
* Body}, POJO fields or beans properties when it expanding
*/
@Retention(RUNTIME)
@java.lang.annotation.Target({PARAMETER, FIELD, METHOD})
public @interface Param {
/** The name of the template parameter. */
String value() default "";
/** 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();
}
}
}