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objectos way ETC

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/*
 * ResourceProto.java criado em 15/12/2013
 * 
 * Propriedade de Objectos Fábrica de Software LTDA.
 * Reprodução parcial ou total proibida.
 */
package br.com.objectos.way.etc;

import java.io.File;
import java.io.IOException;
import java.util.List;

import br.com.objectos.way.core.io.Directory;

import com.google.common.collect.ImmutableList;
import com.google.common.io.ByteSource;
import com.google.common.io.Files;

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

  final ResourceSet set;

  final String dir;

  final Resource resource;

  ResourceCopy(ResourceSet set, Resource resource) {
    this.set = set;
    this.dir = set.getDir();
    this.resource = resource;
  }

  public static ResourceCopy copyTo(ResourceSet set, Resource resource) {
    return new ResourceCopy(set, resource);
  }

  public static ResourceCopy copyToEval(ResourceSet set, Resource resource) {
    return new ResourceCopyEval(set, resource);
  }

  public static ResourceCopy copyToEvalSelection(ResourceSet set, Resource resource) {
    return new ResourceCopyEvalSelection(set, resource);
  }

  public final List copyTo(Directory targetDir) {
    List exs = ImmutableList.of();

    try {
      String name = resource.getName();
      Class contextClass = set.getContextClass();
      ByteSource source = resource.open(contextClass);
      File file = resource.targetFile(targetDir);

      copy(name, source, file);
    } catch (IOException e) {
      exs = ImmutableList. of(e);
    }

    return exs;
  }

  void copy(String resourceName, ByteSource source, File file) throws IOException {
    source.copyTo(Files.asByteSink(file));
  }

}