annotation-file-utilities/src/annotator/find/TypeArgumentCriterion.java

package annotator.find;

import java.util.List;

import annotations.el.RelativeLocation;

import com.sun.source.tree.Tree;
import com.sun.source.util.TreePath;
import com.sun.tools.javac.tree.JCTree;

public class TypeArgumentCriterion implements Criterion {
  private final String methodName;
  private final RelativeLocation loc;

  public TypeArgumentCriterion(String methodName, RelativeLocation loc) {
    this.methodName = methodName;
    this.loc = loc;
  }

  /** {@inheritDoc} */
  @Override
  public boolean isSatisfiedBy(TreePath path, Tree leaf) {
    assert path == null || path.getLeaf() == leaf;
    return isSatisfiedBy(path);
  }

  /** {@inheritDoc} */
  @Override
  public boolean isSatisfiedBy(TreePath path) {
    if (path == null || path.getParentPath() == null) { return false; }

    TreePath parentPath = path.getParentPath();
    Tree parent = parentPath.getLeaf();
    List<? extends Tree> typeArgs;

    switch (parent.getKind()) {
    case MEMBER_REFERENCE:
      typeArgs = ((JCTree.JCMemberReference) parent).getTypeArguments();
      break;
    case METHOD_INVOCATION:
      typeArgs = ((JCTree.JCMethodInvocation) parent).getTypeArguments();
      break;
    default:
      return isSatisfiedBy(parentPath);
    }

    return typeArgs != null
        && loc.index >= 0 && loc.index < typeArgs.size()
        && typeArgs.get(loc.index) == path.getLeaf();
  }

  @Override
  public Kind getKind() {
    return Kind.TYPE_ARGUMENT;
  }

  @Override
  public String toString() {
    return "TypeArgumentCriterion: in method: " + methodName
        + " location: " + loc;
  }
}