在上一篇文章单点登录 - CAS【四】获取更全面的用户信息中提到 配置attributeRepository
key="username"必须是“username”，为什么会是一个定值哪？现在分析下：
1、查看org.jasig.services.persondir.support.jdbc.SingleRowJdbcPersonAttributeDao源代码
2、通过SingleRowJdbcPersonAttributeDao找到父类AbstractJdbcPersonAttributeDao
3、通过AbstractJdbcPersonAttributeDao找到父类AbstractDefaultAttributePersonAttributeDao
看下关键的代码：
public abstract class AbstractDefaultAttributePersonAttributeDao extends AbstractFlatteningPersonAttributeDao {
private IUsernameAttributeProvider usernameAttributeProvider = new SimpleUsernameAttributeProvider();
/**
* @see org.jasig.services.persondir.IPersonAttributeDao#getPerson(java.lang.String)
* @throws org.springframework.dao.IncorrectResultSizeDataAccessException if more than one matching {@link IPersonAttributes} is found.
*/
public IPersonAttributes getPerson(String uid) {
Validate.notNull(uid, "uid may not be null.");
//Generate the seed map for the uid
final Map> seed = this.toSeedMap(uid);
//Run the query using the seed
final Set people = this.getPeopleWithMultivaluedAttributes(seed);
//Ensure a single result is returned
IPersonAttributes person = (IPersonAttributes)DataAccessUtils.singleResult(people);
if (person == null) {
return null;
}
//Force set the name of the returned IPersonAttributes if it isn't provided in the return object
if (person.getName() == null) {
person = new NamedPersonImpl(uid, person.getAttributes());
}
return person;
}
/**
* Converts the uid to a multi-valued seed Map using the value from {@link #getDefaultAttributeName()}
* as the key.
*/
protected Map> toSeedMap(String uid) {
final List
发现如下几行
final List
4、获取SQL查询参数
final String usernameAttribute = this.usernameAttributeProvider.getUsernameAttribute();
然后找到 IUsernameAttributeProvider.java
public class SimpleUsernameAttributeProvider implements IUsernameAttributeProvider {
private String usernameAttribute = "username";
public SimpleUsernameAttributeProvider() {
}
public SimpleUsernameAttributeProvider(String usernameAttribute) {
this.setUsernameAttribute(usernameAttribute);
}
/**
* The usernameAttribute to use
*/
public void setUsernameAttribute(String usernameAttribute) {
Validate.notNull(usernameAttribute);
this.usernameAttribute = usernameAttribute;
}
/* (non-Javadoc)
* @see org.jasig.services.persondir.support.IUsernameAttributeProvider#getUsernameAttribute()
*/
public String getUsernameAttribute() {
return this.usernameAttribute;
}
private String usernameAttribute = "username";
发现原因了吧，原来是在这个地方将属性给写死了，不明白为什么非得要将属性给写死哪？
queryAttributeMapping配置在org.jasig.services.persondir.support.jdbc.SingleRowJdbcPersonAttributeDao中，那么queryAttributeMapping是其或其父类中的属性，完全可以从属性中获取到想要的属性。
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在查看代码是发现AbstractJdbcPersonAttributeDao.java
public abstract class AbstractJdbcPersonAttributeDao extends AbstractQueryPersonAttributeDao {
private static final Pattern WHERE_PLACEHOLDER = Pattern.compile("\\{0\\}");
private final SimpleJdbcTemplate simpleJdbcTemplate;
private final String queryTemplate;
private QueryType queryType = QueryType.AND;
/**
* @param ds The DataSource to use for queries
* @param queryTemplate Template to use for SQL query generation. Use {0} as the placeholder for where the generated portion of the WHERE clause should be inserted.
*/
public AbstractJdbcPersonAttributeDao(DataSource ds, String queryTemplate) {
Validate.notNull(ds, "DataSource can not be null");
Validate.notNull(queryTemplate, "queryTemplate can not be null");
this.simpleJdbcTemplate = new SimpleJdbcTemplate(ds);
this.queryTemplate = queryTemplate;
}
/**
* @return the queryTemplate
*/
public String getQueryTemplate() {
return queryTemplate;
}
/**
* @return the queryType
*/
public QueryType getQueryType() {
return queryType;
}
/**
* Type of logical operator to use when joining WHERE clause components
*
* @param queryType the queryType to set
*/
public void setQueryType(QueryType queryType) {
this.queryType = queryType;
}
QueryType queryType = QueryType.AND;
/**
* Type of logical operator to use when joining WHERE clause components
*
* @param queryType the queryType to set
*/
public void setQueryType(QueryType queryType) {
this.queryType = queryType;
}
queryType 是查询逻辑操作符，值为：AND、OR
难道是支持多条件查询？
而我们在AbstractDefaultAttributePersonAttributeDao.java中发现
final List
where条件后面参数替换
private static final Pattern WHERE_PLACEHOLDER = Pattern.compile("\\{0\\}");
这些只会返回单条数据，而不会支持上面的猜想。