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/*
 * Copyright © 2014 Cask Data, Inc.
 *
 * 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 co.cask.cdap.common.lang;

import co.cask.cdap.internal.lang.FieldVisitor;
import com.google.common.base.Defaults;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.lang.reflect.Type;

/**
 * Package private class for {@link InstantiatorFactory} to initialize fields for instances created using Unsafe.
 */
final class FieldInitializer extends FieldVisitor {

  @Override
  public void visit(Object instance, Type inspectType, Type declareType, Field field) throws Exception {
    if (Modifier.isStatic(field.getModifiers())) {
      return;
    }
    field.set(instance, Defaults.defaultValue(field.getType()));
  }
}