ClassVisitor

package org.objectweb.asm;

public abstract class ClassVisitor {

    protected final int api;
    protected ClassVisitor cv;

    public ClassVisitor(int api) {
        this(api, (ClassVisitor) null);
    }

    public ClassVisitor(int api, ClassVisitor classVisitor) {
        this.api = api;
        this.cv = classVisitor;
    }

    public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
        if (this.cv != null) {
            this.cv.visit(version, access, name, signature, superName, interfaces);
        }

    }

    public void visitSource(String source, String debug) {
        if (this.cv != null) {
            this.cv.visitSource(source, debug);
        }
    }

    public ModuleVisitor visitModule(String name, int access, String version) {
        if (this.api < 393216) {
            throw new UnsupportedOperationException();
        } else {
            return this.cv != null ? this.cv.visitModule(name, access, version) : null;
        }
    }

    @Deprecated
    public void visitNestHostExperimental(String nestHost) {
        if (this.cv != null) {
            this.cv.visitNestHostExperimental(nestHost);
        }
    }

    public void visitOuterClass(String owner, String name, String descriptor) {
        if (this.cv != null) {
            this.cv.visitOuterClass(owner, name, descriptor);
        }

    }

    public AnnotationVisitor visitAnnotation(String descriptor, boolean visible) {
        return this.cv != null ? this.cv.visitAnnotation(descriptor, visible) : null;
    }

    public AnnotationVisitor visitTypeAnnotation(int typeRef, TypePath typePath, String descriptor, boolean visible) {
        return this.cv != null ? this.cv.visitTypeAnnotation(typeRef, typePath, descriptor, visible) : null;
    }

    public void visitAttribute(Attribute attribute) {
        if (this.cv != null) {
            this.cv.visitAttribute(attribute);
        }
    }

    @Deprecated
    public void visitNestMemberExperimental(String nestMember) {
        if (this.cv != null) {
            this.cv.visitNestMemberExperimental(nestMember);
        }
    }

    public void visitInnerClass(String name, String outerName, String innerName, int access) {
        if (this.cv != null) {
            this.cv.visitInnerClass(name, outerName, innerName, access);
        }

    }

    public FieldVisitor visitField(int access, String name, String descriptor, String signature, Object value) {
        return this.cv != null ? this.cv.visitField(access, name, descriptor, signature, value) : null;
    }

    public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
        return this.cv != null ? this.cv.visitMethod(access, name, descriptor, signature, exceptions) : null;
    }

    public void visitEnd() {
        if (this.cv != null) {
            this.cv.visitEnd();
        }
    }
}