* under the License.
 */
package org.apache.maven.model.interpolation.reflection;

/**
 * @deprecated use {@link org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public class IntrospectionException extends Exception {

    /**
     *
     */
    private static final long serialVersionUID = -6090771282553728784L;

    IntrospectionException(String message) {

package org.apache.maven.model.resolution;

import org.apache.maven.model.Model;

/**
 * WorkspaceModelResolver
 *
 * @deprecated use {@link org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public interface WorkspaceModelResolver {

    Model resolveRawModel(String groupId, String artifactId, String versionConstraint)
            throws UnresolvableModelException;

 * under the License.
 */
package org.apache.maven.api;

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nullable;

/**
 * A dependency exclusion.
 *
 * @since 4.0.0
 * @see DependencyCoordinates#getExclusions()
 */
@Experimental
public interface Exclusion {
    @Nullable
    String getGroupId();

    @Nullable
    String getArtifactId();

/**
 * Provides a skeleton implementation for model building listeners. The methods of this class are empty.
 *
 * @deprecated use {@link org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public class AbstractModelBuildingListener implements ModelBuildingListener {

    @Override
    public void buildExtensionsAssembled(ModelBuildingEvent event) {
        // default does nothing
    }

import org.apache.maven.api.Language;
import org.apache.maven.api.annotations.Consumer;
import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.di.Named;

/**
 * @since 4.0.0
 */
@Experimental
@Consumer
@Named

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.eventspy;

/**
 * A skeleton eventspy that does nothing other than helping implementors.
 * @since 3.0.2
 */
public abstract class AbstractEventSpy implements EventSpy {

    public void init(Context context) throws Exception {}

    public void onEvent(Object event) throws Exception {}

import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * The presence of this annotation on an API indicates that the method may not be used with
 * J2kt.
 *
 * @since 32.0.0
 */
@Retention(RetentionPolicy.CLASS)
@Target({ElementType.TYPE, ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.FIELD})
@GwtCompatible

# 更多模型

书接上文，多个关联模型这种情况很常见。

特别是用户模型，因为：

* **输入模型**应该含密码
* **输出模型**不应含密码
* **数据库模型**需要加密的密码

/// danger | "危险"

千万不要存储用户的明文密码。始终存储可以进行验证的**安全哈希值**。

如果不了解这方面的知识，请参阅[安全性中的章节](security/simple-oauth2.md#password-hashing){.internal-link target=_blank}，了解什么是**密码哈希**。

///

## 多个模型

下面的代码展示了不同模型处理密码字段的方式，及使用位置的大致思路：

//// tab | Python 3.10+

```Python hl_lines="7  9  14  20  22  27-28  31-33  38-39"

	// Below are the stacks ignored by the upstream leaktest code.
	"testing.Main(",
	"testing.tRunner(",
	"testing.tRunner(",
	"runtime.goexit",
	"created by runtime.gc",
	// ignore the snapshot function.
	// since the snapshot is taken here the entry will have the current function too.
	"pickRelevantGoroutines",
	"runtime.MHeap_Scavenger",
	"signal.signal_recv",
	"sigterm.handler",
	"runtime_mcall",
	"goroutine in C code",

		bucketL)
	bucketReplTotalFailedBytesMD = NewCounterMD(bucketReplTotalFailedBytes,
		"Total number of bytes failed at least once to replicate since server start",
		bucketL)
	bucketReplTotalFailedCountMD = NewCounterMD(bucketReplTotalFailedCount,
		"Total number of objects which failed replication since server start",
		bucketL)
	bucketReplProxiedDeleteTaggingRequestsFailuresMD = NewCounterMD(bucketReplProxiedDeleteTaggingRequestsFailures,