Java 类com.intellij.util.containers.SoftFactoryMap 实例源码

@NotNull
private static PsiFile getRootByClasses(@NotNull PsiFile file, @NotNull Class[] classes) {
  final Project project = file.getProject();
  SoftFactoryMap<Class[], PsiFile> map = project.getUserData(PATTERN_INJECTION_CONTEXT);
  if (map == null) {
    map = new SoftFactoryMap<Class[], PsiFile>() {

      @Override
      protected PsiFile create(Class[] key) {
        String text = PatternCompilerFactory.getFactory().getPatternCompiler(key).dumpContextDeclarations();
        return PsiFileFactory.getInstance(project).createFileFromText("context.groovy", GroovyFileType.GROOVY_FILE_TYPE, text);
      }
    };
    project.putUserData(PATTERN_INJECTION_CONTEXT, map);
  }
  return map.get(classes);
}