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/*
 * SnakeYamlMappgin.java criado em 07/09/2012
 * 
 * Propriedade de Objectos Fábrica de Software LTDA.
 * Reprodução parcial ou total proibida.
 */
package br.com.objectos.way.etc;

import static com.google.common.collect.Lists.transform;

import java.util.List;
import java.util.Map;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;

/**
 * @author [email protected] (Marcio Endo)
 */
class MappingPojo implements Mapping {

  private final Map map;

  public MappingPojo(Map map) {
    this.map = map;
  }

  @SuppressWarnings("unchecked")
  @Override
  public Mapping getMapping(String key) {
    Mapping res = MappingEmpty.INSTANCE;

    Object object = map.get(key);
    if (object != null) {
      res = new MappingPojo((Map) object);
    }

    return res;
  }

  @Override
  public List getSequence(String key) {
    List res = ImmutableList.of();

    Object object = map.get(key);
    if (object != null) {
      res = ToMapping.load(object);
    }

    return res;
  }

  @Override
  public String getString(String key) {
    Object object = map.get(key);

    if (object == null) {
      object = "";
    }

    return object.toString();
  }

  @Override
  public boolean getBoolean(String key) {
    boolean res = false;

    Object object = map.get(key);
    if (object != null) {
      res = Boolean.class.cast(object).booleanValue();
    }

    return res;
  }

  @Override
  public int getInt(String key) {
    int res = 0;

    Object object = map.get(key);
    if (object != null) {
      res = Integer.class.cast(object).intValue();
    }

    return res;
  }

  @Override
  public long getLong(String key) {
    long res = 0;

    Object object = map.get(key);
    if (object != null) {
      res = Long.class.cast(object).longValue();
    }

    return res;
  }

  @Override
  public float getFloat(String key) {
    float res = 0;

    Object object = map.get(key);
    if (object != null) {
      res = Double.class.cast(object).floatValue();
    }

    return res;
  }

  @Override
  public double getDouble(String key) {
    double res = 0;

    Object object = map.get(key);
    if (object != null) {
      res = Double.class.cast(object).doubleValue();
    }

    return res;
  }

  @Override
  public  List loadSequence(String key, EtcLoader loader) {
    List mappings;
    mappings = getSequence(key);

    List loaded;
    loaded = transform(mappings, new LoaderWrapper(loader));

    return ImmutableList.copyOf(loaded);
  }

  private static class LoaderWrapper implements Function {

    private final EtcLoader loader;

    public LoaderWrapper(EtcLoader loader) {
      this.loader = loader;
    }

    @Override
    public T apply(Mapping input) {
      return loader.load(input);
    }

  }

}