com.jshnd.virp.annotation.FieldAnnotationUtil.java Source code

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Here is the source code for com.jshnd.virp.annotation.FieldAnnotationUtil.java

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/*
 * Copyright 2012 Jonathan Sabados
 *
 * 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 com.jshnd.virp.annotation;

import com.jshnd.virp.exception.VirpAnnotationException;
import com.jshnd.virp.reflection.ReflectionUtil;
import org.apache.commons.lang3.StringUtils;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

class FieldAnnotationUtil implements AnnotationUtil {

    private Field field;

    private Class<?> classFor;

    private Method getter;

    private Method setter;

    FieldAnnotationUtil(Field field, Class<?> classFor) {
        this.field = field;
        this.classFor = classFor;
        String methodName = "get" + StringUtils.capitalize(field.getName());
        try {
            getter = classFor.getMethod(methodName);
        } catch (NoSuchMethodException e) {
            methodName = "is" + StringUtils.capitalize(field.getName());
            try {
                getter = classFor.getMethod(methodName);
            } catch (NoSuchMethodException e2) {
                throw new VirpAnnotationException("Getter for field " + field.getName() + " not found");
            }
        }
        try {
            setter = ReflectionUtil.getSetter(classFor, getGetMethod());
        } catch (NoSuchMethodException e) {
            throw new VirpAnnotationException("Setter for field " + field.getName() + " not found");
        }
    }

    @Override
    public <T extends Annotation> T getAnnotation(Class<T> annotation) {
        return field.getAnnotation(annotation);
    }

    @Override
    public Annotation[] getAnnotations() {
        return field.getAnnotations();
    }

    @Override
    public Method getGetMethod() {
        return getter;
    }

    @Override
    public Method getSetMethod() {
        return setter;
    }

    @Override
    public Class<?> getType() {
        return field.getType();
    }
}