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Copy pathMethodErrorHandler.java
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65 lines (58 loc) · 2.55 KB
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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.error;
import feign.Response;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
class MethodErrorHandler {
private final Map<Integer, ExceptionGenerator> methodLevelExceptionsByCode;
private final Map<Integer, ExceptionGenerator> classLevelExceptionsByCode;
private final ExceptionGenerator defaultException;
MethodErrorHandler(
Map<Integer, ExceptionGenerator> methodLevelExceptionsByCode,
Map<Integer, ExceptionGenerator> classLevelExceptionsByCode,
ExceptionGenerator defaultException) {
this.methodLevelExceptionsByCode = methodLevelExceptionsByCode;
this.classLevelExceptionsByCode = classLevelExceptionsByCode;
this.defaultException = defaultException;
}
public Exception decode(Response response) {
ExceptionGenerator constructorDefinition = getConstructorDefinition(response);
return createException(constructorDefinition, response);
}
private ExceptionGenerator getConstructorDefinition(Response response) {
if (methodLevelExceptionsByCode.containsKey(response.status())) {
return methodLevelExceptionsByCode.get(response.status());
}
if (classLevelExceptionsByCode.containsKey(response.status())) {
return classLevelExceptionsByCode.get(response.status());
}
return defaultException;
}
protected Exception createException(ExceptionGenerator constructorDefinition, Response response) {
try {
return constructorDefinition.createException(response);
} catch (IllegalAccessException e) {
throw new IllegalStateException("Cannot access constructor", e);
} catch (InstantiationException e) {
throw new IllegalStateException("Cannot instantiate exception with constructor", e);
} catch (InvocationTargetException e) {
throw new IllegalStateException("Cannot invoke constructor", e);
} catch (NoSuchMethodException e) {
throw new IllegalStateException("Constructor does not exist", e);
}
}
}