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objectos way ETC

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/*
 * EtcMap.java criado em 31/12/2013
 * 
 * Propriedade de Objectos Fábrica de Software LTDA.
 * Reprodução parcial ou total proibida.
 */
package br.com.objectos.way.etc;

import static com.google.common.collect.Maps.newHashMapWithExpectedSize;

import java.util.Map;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import com.google.inject.Inject;
import com.google.inject.Singleton;

/**
 * @author [email protected] (Marcio Endo)
 */
@Singleton
class EtcMap {

  private final Map model;

  private final Map nameMap;

  @Inject
  public EtcMap(Map model) {
    this.model = model;

    Map nameMap = newHashMapWithExpectedSize(model.size());
    for (Map.Entry entry : model.entrySet()) {
      EtcKey key = entry.getKey();
      Class type = key.get();
      String name = type.getSimpleName();

      Etc value = entry.getValue();
      nameMap.put(name.toLowerCase(), value);
    }
    this.nameMap = ImmutableMap.copyOf(nameMap);
  }

  public Etc get(Class type) {
    return checkType(type);
  }

  public Etc get(EtcProperty property) {
    String type = property.getType();
    String name = type.toLowerCase();
    Preconditions.checkArgument(nameMap.containsKey(name), "No mapping found for " + type);
    return nameMap.get(name);
  }

  private Etc checkType(Class type) {
    EtcKey key = new EtcKey(type);
    Preconditions.checkArgument(model.containsKey(key), "No mapping found for " + type);
    return model.get(key);
  }

}