org.checkerframework.dataflow.cfg.node.SynchronizedNode Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of checker Show documentation

The Checker Framework enhances Java's type system to make it more powerful and useful. This lets software developers detect and prevent errors in their Java programs. The Checker Framework includes compiler plug-ins ("checkers") that find bugs or verify their absence. It also permits you to write your own compiler plug-ins.

There is a newer version: 3.43.0

Show newest version

package org.checkerframework.dataflow.cfg.node;

import com.sun.source.tree.Tree;
import java.util.Collection;
import java.util.Collections;
import java.util.Objects;
import javax.lang.model.type.TypeKind;
import javax.lang.model.util.Types;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * This represents the start and end of synchronized code block. If startOfBlock == true it is the
 * node preceding a synchronized code block. Otherwise it is the node immediately after a
 * synchronized code block.
 */
public class SynchronizedNode extends Node {

  protected final @Nullable Tree tree;
  protected final Node expression;
  protected final boolean startOfBlock;

  public SynchronizedNode(@Nullable Tree tree, Node expression, boolean startOfBlock, Types types) {
    super(types.getNoType(TypeKind.NONE));
    this.tree = tree;
    this.expression = expression;
    this.startOfBlock = startOfBlock;
  }

  @Override
  public @Nullable Tree getTree() {
    return tree;
  }

  public Node getExpression() {
    return expression;
  }

  public boolean getIsStartOfBlock() {
    return startOfBlock;
  }

  @Override
  public  R accept(NodeVisitor visitor, P p) {
    return visitor.visitSynchronized(this, p);
  }

  @Override
  public String toString() {
    StringBuilder sb = new StringBuilder();
    sb.append("synchronized (");
    sb.append(expression);
    sb.append(")");
    return sb.toString();
  }

  @Override
  public boolean equals(@Nullable Object obj) {
    if (!(obj instanceof SynchronizedNode)) {
      return false;
    }
    SynchronizedNode other = (SynchronizedNode) obj;
    return Objects.equals(getTree(), other.getTree())
        && getExpression().equals(other.getExpression())
        && startOfBlock == other.startOfBlock;
  }

  @Override
  public int hashCode() {
    return Objects.hash(tree, startOfBlock, getExpression());
  }

  @Override
  public Collection getOperands() {
    return Collections.emptyList();
  }
}