net.gdface.sdk.fse

Class BaseFseDbEngine<F extends gu.sql2java.BaseRow>

java.lang.Object

net.gdface.sdk.fse.BaseFseDbEngine<F>

Type Parameters:

F - 保存特征数据的记录

public abstract class BaseFseDbEngine<F extends gu.sql2java.BaseRow>
extends java.lang.Object

基于数据库的特征搜索引擎 依赖库:

• groupId: com.gitee.l0km
• artifactId: sql2java-manager

Author:

guyadong

Field Summary

Fields

Modifier and Type	Field and Description
protected FeatureSeDecorator	fse

Constructor Summary

Constructors

Constructor and Description
BaseFseDbEngine(FeatureSe fse)

Method Summary

Modifier and Type	Method and Description
protected void	addFeatureBean(F bean)
protected boolean	beanFilter(F bean) 数据库记录过滤器函数
protected byte[]	featureIdOf(F bean) 从特征记录中返回特征数据的MD5
protected abstract byte[]	featureOf(F bean) 从特征记录中返回特征数组
void	init() 搜索引擎初始化
protected void	loaddb() 加载数据库中所有特征到FSE内存表
protected java.lang.String	ownerOf(F bean) 从特征记录中返回特征所属者ID
CodeBean[]	searchFeatures(byte[] feature, double similarty, int rows)
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

fse

protected final FeatureSeDecorator fse

Constructor Detail

BaseFseDbEngine

public BaseFseDbEngine(FeatureSe fse)

Parameters:

fse - FeatureSe引擎实例

Method Detail

loaddb

protected void loaddb()

加载数据库中所有特征到FSE内存表

init

public void init()

搜索引擎初始化

Parameters:

dao - Dao对象

addFeatureBean

protected void addFeatureBean(F bean)

featureIdOf

protected byte[] featureIdOf(F bean)

从特征记录中返回特征数据的MD5

Parameters:

bean -

Returns:

MD5校验码(16字节数组)

ownerOf

protected java.lang.String ownerOf(F bean)

从特征记录中返回特征所属者ID

Parameters:

bean -

Returns:

32字节HEX字符串

featureOf

protected abstract byte[] featureOf(F bean)

从特征记录中返回特征数组

Parameters:

bean -

Returns:

特征数据(二进制数组)

beanFilter

protected boolean beanFilter(F bean)

数据库记录过滤器函数

Parameters:

bean -

Returns:

返回true则加入FSE,否则跳过

searchFeatures

public CodeBean[] searchFeatures(byte[] feature,
                                 double similarty,
                                 int rows)

Parameters:

feature - 要比对的特征码

similarty - 相似度阀值

rows - 最多返回的记录数目

Returns:

返回包含相似度(降序)的结果数组,如果没有查到匹配的记录则返回空数组

See Also:

FeatureSe.searchCode(byte[], double, int)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object