# Klassen als Abhängigkeiten

Bevor wir tiefer in das **Dependency Injection** System eintauchen, lassen Sie uns das vorherige Beispiel verbessern.

## Ein `dict` aus dem vorherigen Beispiel

Im vorherigen Beispiel haben wir ein `dict` von unserer Abhängigkeit („Dependable“) zurückgegeben:

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[9] *}

Aber dann haben wir ein `dict` im Parameter `commons` der *Pfadoperation-Funktion*.

		return true
	default:
		return false
	}
}

// ExplainSQL generate SQL string with given parameters, the generated SQL is expected to be used in logger, execute it might introduce a SQL injection vulnerability
func ExplainSQL(sql string, numericPlaceholder *regexp.Regexp, escaper string, avars ...interface{}) string {
	var (
		convertParams func(interface{}, int)
		vars          = make([]string, len(avars))
	)

    /** Factory for creating ingesters to process documents */
    private IngestFactory ingestFactory = null;

    /**
     * Initializes the callback implementation after dependency injection.
     * Sets up configuration values and initializes the ingest factory if available.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {

### Dependency Injection

FastAPI bao gồm một hệ thống <abbr title='cũng biết đến như là "components", "resources", "services", "providers"'><strong>Dependency Injection</strong></abbr> vô cùng dễ sử dụng nhưng vô cùng mạnh mẽ.

        // This is complex due to the class structure. A better approach would be
        // to refactor SmbFile to be more testable (e.g., dependency injection).
        // For now, we test methods that don't require deep mocks.
        return new SmbFile(url, auth);
    }

    /**
     * Initializes the query field configuration by loading field mappings from FessConfig.
     * This method is called after dependency injection is complete.
     * It sets up response fields, search fields, facet fields, sort fields, and other
     * field configurations based on the application configuration.
     */
    @PostConstruct
    public void init() {

    /**
     * Initializes the RelatedContentHelper by loading related content configurations
     * from the data store. This method is called automatically after dependency
     * injection is complete.
     *
     * PostConstruct annotation ensures this method is called after the bean
     * has been constructed and all dependencies have been injected.
     */
    @PostConstruct
    public void init() {

 */
package jcifs.util;

import java.util.regex.Pattern;

/**
 * Comprehensive input validation utility for SMB protocol implementation.
 * Provides validation methods to prevent buffer overflows, injection attacks,
 * and other security vulnerabilities.
 */
public final class InputValidator {

    private InputValidator() {
        // Utility class
    }

import java.util.concurrent.atomic.AtomicLong;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.smb.SmbException;

/**
 * Validator for SMB server responses to prevent buffer overflow and injection attacks.
 *
 * Features:
 * - Buffer bounds checking
 * - Integer overflow prevention
 * - Size validation
 * - Protocol compliance checking
 * - Malformed response detection
 */

### Wstrzykiwanie Zależności

FastAPI zawiera niezwykle łatwy w użyciu, ale niezwykle potężny system <abbr title='Po angielsku: Dependency Injection. Znane również jako "components", "resources", "services", "providers"'><strong>Wstrzykiwania Zależności</strong></abbr>.

* Nawet zależności mogą mieć zależności, tworząc hierarchię lub **"graf" zależności**.