org.apache.ibatis.binding.MapperRegistry Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ibatis-sqlmap

There is a newer version: 3.0-beta-10

package org.apache.ibatis.binding;

import org.apache.ibatis.builder.annotation.MapperAnnotationBuilder;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSession;

import java.util.HashSet;
import java.util.Set;

public class MapperRegistry {

  private Configuration config;
  private Set knownMappers = new HashSet();

  public MapperRegistry(Configuration config) {
    this.config = config;
  }

  public  T getMapper(Class type, SqlSession sqlSession) {
    if (!knownMappers.contains(type))
      throw new BindingException("Type " + type + " is not known to the MapperRegistry.");
    try {
      return MapperProxy.newMapperProxy(type, sqlSession);
    } catch (Exception e) {
      throw new BindingException("Error getting mapper instance. Cause: " + e, e);
    }
  }

  public boolean hasMapper(Class type) {
    return knownMappers.contains(type);
  }

  public void addMapper(Class type) {
    if (!type.isInterface())
      throw new BindingException("Only interfaces can be configured by the MapperFactory.  Type " + type + " is not an interface.");
    if (knownMappers.contains(type))
      throw new BindingException("Type " + type + " is already known to the MapperRegistry.");
    knownMappers.add(type);
    // It's important that the type is added before the parser is run
    // otherwise the binding may automatically be attempted by the
    // mapper parser.  If the type is already known, it won't try.
    MapperAnnotationBuilder parser = new MapperAnnotationBuilder(config, type);
    parser.parse();
  }
}