BeansMapper.java

package net.minidev.json.writer;

/*
 *    Copyright 2011-2024 JSON-SMART authors
 *
 * 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.
 */

import java.lang.reflect.Type;
import java.util.Date;
import java.util.HashMap;
import net.minidev.asm.Accessor;
import net.minidev.asm.BeansAccess;
import net.minidev.asm.ConvertDate;
import net.minidev.json.JSONUtil;

@SuppressWarnings("unchecked")
public abstract class BeansMapper<T> extends JsonReaderI<T> {

  public BeansMapper(JsonReader base) {
    super(base);
  }

  public abstract Object getValue(Object current, String key);

  public static class Bean<T> extends JsonReaderI<T> {
    final Class<T> clz;
    final BeansAccess<T> ba;
    final HashMap<String, Accessor> index;

    public Bean(JsonReader base, Class<T> clz) {
      super(base);
      this.clz = clz;
      this.ba = BeansAccess.get(clz, JSONUtil.JSON_SMART_FIELD_FILTER);
      this.index = ba.getMap();
    }

    @Override
    public void setValue(Object current, String key, Object value) {
      ba.set((T) current, key, value);
      // Accessor nfo = index.get(key);
      // if (nfo == null)
      // throw new RuntimeException("Can not set " + key + " field in " +
      // clz);
      // value = JSONUtil.convertTo(value, nfo.getType());
      // ba.set((T) current, nfo.getIndex(), value);
    }

    public Object getValue(Object current, String key) {
      return ba.get((T) current, key);
      // Accessor nfo = index.get(key);
      // if (nfo == null)
      // throw new RuntimeException("Can not set " + key + " field in " +
      // clz);
      // return ba.get((T) current, nfo.getIndex());
    }

    @Override
    public Type getType(String key) {
      Accessor nfo = index.get(key);
      return nfo.getGenericType();
    }

    @Override
    public JsonReaderI<?> startArray(String key) {
      Accessor nfo = index.get(key);
      if (nfo == null)
        throw new RuntimeException("Can not find Array '" + key + "' field in " + clz);
      return base.getMapper(nfo.getGenericType());
    }

    @Override
    public JsonReaderI<?> startObject(String key) {
      Accessor f = index.get(key);
      if (f == null)
        throw new RuntimeException("Can not find Object '" + key + "' field in " + clz);
      return base.getMapper(f.getGenericType());
    }

    @Override
    public Object createObject() {
      return ba.newInstance();
    }
  }

  public static class BeanNoConv<T> extends JsonReaderI<T> {
    final Class<T> clz;
    final BeansAccess<T> ba;
    final HashMap<String, Accessor> index;

    public BeanNoConv(JsonReader base, Class<T> clz) {
      super(base);
      this.clz = clz;
      this.ba = BeansAccess.get(clz, JSONUtil.JSON_SMART_FIELD_FILTER);
      this.index = ba.getMap();
    }

    @Override
    public void setValue(Object current, String key, Object value) {
      ba.set((T) current, key, value);
    }

    public Object getValue(Object current, String key) {
      return ba.get((T) current, key);
    }

    @Override
    public Type getType(String key) {
      Accessor nfo = index.get(key);
      return nfo.getGenericType();
    }

    @Override
    public JsonReaderI<?> startArray(String key) {
      Accessor nfo = index.get(key);
      if (nfo == null) throw new RuntimeException("Can not set " + key + " field in " + clz);
      return base.getMapper(nfo.getGenericType());
    }

    @Override
    public JsonReaderI<?> startObject(String key) {
      Accessor f = index.get(key);
      if (f == null) throw new RuntimeException("Can not set " + key + " field in " + clz);
      return base.getMapper(f.getGenericType());
    }

    @Override
    public Object createObject() {
      return ba.newInstance();
    }
  }

  public static JsonReaderI<Date> MAPPER_DATE =
      new ArraysMapper<Date>(null) {
        @Override
        public Date convert(Object current) {
          return ConvertDate.convertToDate(current);
        }
      };
}