org.jsonschema2pojo.AnnotatorFactory Maven / Gradle / Ivy
/**
* Copyright © 2010-2017 Nokia
*
* 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 org.jsonschema2pojo;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
/**
* Factory object for creating {@link Annotator}s for all the supported
* annotation styles.
*/
public class AnnotatorFactory {
private final GenerationConfig generationConfig;
public AnnotatorFactory(GenerationConfig generationConfig) {
this.generationConfig = generationConfig;
}
/**
* Create a new {@link Annotator} that can create annotations according to
* the given style.
*
* @param style
* the annotation style that dictates what kind of annotations
* are required.
* @return an annotator matching to given style
*/
public Annotator getAnnotator(AnnotationStyle style) {
switch (style) {
case JACKSON:
case JACKSON2:
return new Jackson2Annotator(generationConfig);
case JACKSON1:
return new Jackson1Annotator(generationConfig);
case GSON:
return new GsonAnnotator(generationConfig);
case MOSHI1:
return new Moshi1Annotator(generationConfig);
case NONE:
return new NoopAnnotator();
default:
throw new IllegalArgumentException("Unrecognised annotation style: " + style);
}
}
/**
* Create a new custom {@link Annotator} from the given class.
*
* @param clazz
* A class implementing {@link Annotator}.
* @return an instance of the given annotator type
*/
public Annotator getAnnotator(Class clazz) {
if (!Annotator.class.isAssignableFrom(clazz)) {
throw new IllegalArgumentException("The class name given as a custom annotator (" + clazz.getName() + ") does not refer to a class that implements " + Annotator.class.getName());
}
try {
try {
Constructor constructor = clazz.getConstructor(GenerationConfig.class);
return constructor.newInstance(generationConfig);
} catch (NoSuchMethodException e) {
return clazz.newInstance();
}
} catch (InvocationTargetException e) {
throw new IllegalArgumentException("Failed to create a custom annotator from the given class. An exception was thrown on trying to create a new instance.", e.getCause());
} catch (InstantiationException e) {
throw new IllegalArgumentException("Failed to create a custom annotator from the given class. An exception was thrown on trying to create a new instance.", e.getCause());
} catch (IllegalAccessException e) {
throw new IllegalArgumentException("Failed to create a custom annotator from the given class. It appears that we do not have access to this class - is both the class and its no-arg constructor marked public?", e);
}
}
public CompositeAnnotator getAnnotator( Annotator... annotators ) {
return new CompositeAnnotator(annotators);
}
}