} finally {
                ZipInputStreamUtil.closeEntry(zipInputStream);
            }
        }
    }

    /**
     * Traverses classes contained in the file system.
     *
     * @param dir the base directory
     * @param packageName the package name to traverse
     * @param handler the handler to process classes
     */

            throw new MetadataGraphTransformationException(e);
        }
    }

    // ===================================================================================================
    /**
     * Helper class to traverse graph. Required to make the containing method thread-safe
     * and yet use class level data to lessen stack usage in recursion
     */
    private class ClasspathGraphVisitor {
        MetadataGraph graph;

import java.util.AbstractMap.SimpleImmutableEntry;
import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@code Entry} for {@link ImmutableMap} that adds extra methods to traverse hash
 * buckets for the key and the value. This allows reuse in {@link RegularImmutableMap} and {@link
 * RegularImmutableBiMap}, which don't have to recopy the entries created by their {@code Builder}
 * implementations.
 *

     */
    int FILE_READ_EA = 0x00000008; // 4
    /**
     * Permission to write extended attributes
     */
    int FILE_WRITE_EA = 0x00000010; // 5
    /**
     * Permission to execute a file or traverse a directory
     */
    int FILE_EXECUTE = 0x00000020; // 6
    /**
     * Permission to delete a file or directory
     */
    int FILE_DELETE = 0x00000040; // 7
    /**
     * Permission to read file attributes

func (e *FuncExpr) aggregateRow(r Record, tableAlias string) error {
	switch e.getFunctionName() {
	case aggFnAvg, aggFnSum, aggFnMax, aggFnMin, aggFnCount:
		return e.evalAggregationNode(r, tableAlias)
	default:
		// TODO: traverse arguments and call aggregateRow on
		// them if they could be an ancestor of an
		// aggregation.
	}
	return nil
}

// getAggregate() implementation for each AST node follows. This is

    public static final int FILE_READ_EA = 0x00000008; // 4
    /** Permission to write extended attributes */
    public static final int FILE_WRITE_EA = 0x00000010; // 5
    /** Permission to execute a file or traverse a directory */
    public static final int FILE_EXECUTE = 0x00000020; // 6
    /** Permission to delete a file or directory */
    public static final int FILE_DELETE = 0x00000040; // 7

 */
package org.codelibs.core.io;

/**
 * Object representing a collection of classes or resources.
 *
 * @author koichik
 * @see TraversalUtil
 */
public interface Traverser {

    /**
     * Returns <code>true</code> if the class file corresponding to the specified class name exists in the resources handled by this instance.
     * <p>

        final Traverser[] traversers = TraversalUtil.getTraversers("org.codelibs.core.io.xxx");
        assertThat(traversers, is(notNullValue()));
        assertThat(traversers.length, is(1));

        final Traverser traverser = traversers[0];
        assertThat(traverser instanceof FileSystemTraverser, is(true));

        assertThat(traverser.isExistClass("DummyTest"), is(true));

        assertArgumentNotNull("handler", handler);

        forEach(rootDir, null, handler);
    }

    /**
     * Traverses resources contained in the file system.
     * <p>

import org.eclipse.aether.collection.DependencyTraverser;
import org.eclipse.aether.graph.Dependency;

import static java.util.Objects.requireNonNull;

/**
 * A dependency traverser that excludes the dependencies of fat artifacts from the traversal. Fat artifacts are
 * artifacts that have the property {@link MavenArtifactProperties#INCLUDES_DEPENDENCIES} set to
 * {@code true}.
 *