content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.extension.matcher;
  
  import static io.opentelemetry.javaagent.extension.matcher.Utils.safeTypeDefinitionName;
  import static java.util.logging.Level.FINE;
  
  import io.opentelemetry.javaagent.extension.matcher.internal.DelegatingMatcher;
  import java.util.logging.Logger;
  import javax.annotation.Nullable;
  import net.bytebuddy.description.type.TypeDefinition;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  /**
   * An element matcher that matches its argument's {@link TypeDescription.Generic} raw type against
   * the given matcher for a {@link TypeDescription}. As a wildcard does not define an erasure, a
   * runtime exception is thrown when this matcher is applied to a wildcard.
   *
   * <p>Catches and logs exception if it was thrown when getting erasure, returning false.
   *
   * @param <T> The type of the matched entity.
   * @see net.bytebuddy.matcher.ErasureMatcher
   */
  class SafeErasureMatcher<T extends TypeDefinition> extends ElementMatcher.Junction.AbstractBase<T>
      implements DelegatingMatcher {
  
    private static final Logger logger = Logger.getLogger(SafeErasureMatcher.class.getName());
  
    /** The matcher to apply to the raw type of the matched element. */
    private final ElementMatcher<TypeDescription> matcher;
  
    /**
     * Creates a new erasure matcher.
     *
     * @param matcher The matcher to apply to the raw type.
     */
    public SafeErasureMatcher(ElementMatcher<TypeDescription> matcher) {
      this.matcher = matcher;
    }
  
    @Override
    public boolean matches(T target) {
      TypeDescription erasure = safeAsErasure(target);
      if (erasure == null) {
        return false;
      } else {
        // We would like matcher exceptions to propagate
        return matcher.matches(erasure);
      }
    }
  
    static TypeDescription safeAsErasure(TypeDefinition typeDefinition) {
      try {
        return typeDefinition.asErasure();
      } catch (Throwable e) {
        if (logger.isLoggable(FINE)) {
          logger.log(
              FINE,
              "{0} trying to get erasure for target {1}: {2}",
              new Object[] {
                e.getClass().getSimpleName(), safeTypeDefinitionName(typeDefinition), e.getMessage()
              });
        }
        return null;
      }
    }
  
    @Override
    public String toString() {
      return "safeErasure(" + matcher + ")";
    }
  
    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj == this) {
        return true;
      }
      if (!(obj instanceof SafeErasureMatcher)) {
        return false;
      }
      SafeErasureMatcher<?> other = (SafeErasureMatcher<?>) obj;
      return matcher.equals(other.matcher);
    }
  
    @Override
    public int hashCode() {
      return matcher.hashCode();
    }
  
    @Override
    public ElementMatcher<?> getDelegate() {
      return matcher;
    }
  }
  