net.bytebuddy.matcher.ClassLoaderHierarchyMatcher Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of byte-buddy Show documentation

Byte Buddy is a Java library for creating Java classes at run time. This artifact is a build of Byte Buddy with all ASM dependencies repackaged into its own name space.

There is a newer version: 1.15.11

Show newest version

package net.bytebuddy.matcher;

import net.bytebuddy.build.HashCodeAndEqualsPlugin;

/**
 * An element matcher that matches all {@link java.lang.ClassLoader}s in the matched class loaders hierarchy
 * against a given matcher.
 *
 * @param  The exact type of the class loader that is matched.
 */
@HashCodeAndEqualsPlugin.Enhance
public class ClassLoaderHierarchyMatcher extends ElementMatcher.Junction.AbstractBase {

    /**
     * The matcher to apply on each class loader in the hierarchy.
     */
    private final ElementMatcher matcher;

    /**
     * Creates a new class loader hierarchy matcher.
     *
     * @param matcher The matcher to apply on each class loader in the hierarchy.
     */
    public ClassLoaderHierarchyMatcher(ElementMatcher matcher) {
        this.matcher = matcher;
    }

    @Override
    public boolean matches(T target) {
        ClassLoader current = target;
        while (current != null) {
            if (matcher.matches(current)) {
                return true;
            }
            current = current.getParent();
        }
        return matcher.matches(null);
    }

    @Override
    public String toString() {
        return "hasChild(" + matcher + ')';
    }
}