[OPENJPA-2188] metamodel generation with internal Map creates invalid metamodel

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.2.0
• Component/s: jpa
• Assignee: Unassigned
• Reporter: jieryn
• Created: 09/May/12 13:11
• Updated: 09/May/12 13:15

Description

import java.util.SortedMap;
import java.util.TreeMap;

import javax.persistence.Basic;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.criteria.Path;
import javax.persistence.criteria.Root;

@Entity
public final class BuggyMetamodel
{
  enum Type
  {
    A,
    B,
    C;
  }

  protected static Path<SortedMap<Type, Integer>> pathMap1(
      final Root<BuggyMetamodel> root)
  {
    return root.<SortedMap<Type, Integer>>get(BuggyMetamodel_.map1);
  }

  protected static Path<SortedMap<Type, Integer>> pathMap2(
      final Root<BuggyMetamodel> root)
  {
    return root
        .<SortedMap<Type, SortedMap<String, Integer>>>get(BuggyMetamodel_.map2);
  }

  protected static Path<String> pathString(final Root<BuggyMetamodel> root)
  {
    return root.<String>get(BuggyMetamodel_.string);
  }

  @ElementCollection
  private final SortedMap<Type, Integer>                    map1   = new TreeMap<Type, Integer>();

  @ElementCollection
  private final SortedMap<Type, SortedMap<String, Integer>> map2   = new TreeMap<Type, SortedMap<String, Integer>>();

  @Basic
  private final String                                      string = "OpenJPA Rocks!";
}

nearly produces (minor change to remove "package ;" – see OPENJPA-2187)

/** 
 *  Generated by OpenJPA MetaModel Generator Tool.
 **/

import java.util.SortedMap;

import javax.persistence.metamodel.MapAttribute;
import javax.persistence.metamodel.SingularAttribute;

@javax.persistence.metamodel.StaticMetamodel(value = BuggyMetamodel.class)
@javax.annotation.Generated(value = "org.apache.openjpa.persistence.meta.AnnotationProcessor6", date = "Wed May 09 08:58:50 EDT 2012")
public class BuggyMetamodel_
{
  public static volatile MapAttribute<BuggyMetamodel, BuggyMetamodel.Type, Integer>   map1;

  public static volatile MapAttribute<BuggyMetamodel, BuggyMetamodel.Type, SortedMap> map2;

  public static volatile SingularAttribute<BuggyMetamodel, String>                    string;
}

which will not let BuggyMetamodel compile because:

[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /workspace/project/src/main/java/BuggyMetamodel.java:[23,15] cannot find symbol
symbol  : method <java.util.SortedMap<BuggyMetamodel.Type,java.lang.Integer>>get(javax.persistence.metamodel.MapAttribute<BuggyMetamodel,BuggyMetamodel.Type,java.lang.Integer>)
location: interface javax.persistence.criteria.Root<BuggyMetamodel>
[ERROR] /workspace/project/src/main/java/BuggyMetamodel.java:[30,8] cannot find symbol
symbol  : method <java.util.SortedMap<BuggyMetamodel.Type,java.util.SortedMap<java.lang.String,java.lang.Integer>>>get(javax.persistence.metamodel.MapAttribute<BuggyMetamodel,BuggyMetamodel.Type,java.util.SortedMap>)
location: interface javax.persistence.criteria.Root<BuggyMetamodel>
[INFO] 2 errors 
[INFO] -------------------------------------------------------------

There's some fairly unreadable generic code going on, and I am not sure whether the reduction of SortedMap<String,Integer> to SortedMap without generic types is not a separate bug .... but either way, the metamodel generated classes are not usable in this configuration.