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| <h2 title="Interface PrincipalCollection" class="title">Interface PrincipalCollection</h2> |
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| <dt>All Superinterfaces:</dt> |
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| </dl> |
| <dl> |
| <dt>All Known Subinterfaces:</dt> |
| <dd><a href="../../../../org/apache/shiro/subject/MutablePrincipalCollection.html" title="interface in org.apache.shiro.subject">MutablePrincipalCollection</a>, <a href="../../../../org/apache/shiro/subject/PrincipalMap.html" title="interface in org.apache.shiro.subject">PrincipalMap</a></dd> |
| </dl> |
| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../../org/apache/shiro/subject/SimplePrincipalCollection.html" title="class in org.apache.shiro.subject">SimplePrincipalCollection</a>, <a href="../../../../org/apache/shiro/subject/SimplePrincipalMap.html" title="class in org.apache.shiro.subject">SimplePrincipalMap</a></dd> |
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| <pre>public interface <a href="../../../../src-html/org/apache/shiro/subject/PrincipalCollection.html#line.40">PrincipalCollection</a> |
| extends <a href="http://java.sun.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>, <a href="http://java.sun.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></pre> |
| <div class="block">A collection of all principals associated with a corresponding <a href="../../../../org/apache/shiro/subject/Subject.html" title="interface in org.apache.shiro.subject"><code>Subject</code></a>. A <em>principal</em> is |
| just a security term for an identifying attribute, such as a username or user id or social security number or |
| anything else that can be considered an 'identifying' attribute for a <code>Subject</code>. |
| <p/> |
| A PrincipalCollection organizes its internal principals based on the <code>Realm</code> where they came from when the |
| Subject was first created. To obtain the principal(s) for a specific Realm, see the <a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#fromRealm-java.lang.String-"><code>fromRealm(java.lang.String)</code></a> method. You |
| can also see which realms contributed to this collection via the <a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#getRealmNames--"><code>getRealmNames()</code></a> method.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>0.9</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#getPrimaryPrincipal--"><code>getPrimaryPrincipal()</code></a>, |
| <a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#fromRealm-java.lang.String-"><code>fromRealm(String realmName)</code></a>, |
| <a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#getRealmNames--"><code>getRealmNames()</code></a></dd> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="http://java.sun.com/javase/6/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#asList--">asList</a></span>()</code> |
| <div class="block">Returns a single Subject's principals retrieved from all configured Realms as a List, or an empty List if |
| there are not any principals.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="http://java.sun.com/javase/6/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#asSet--">asSet</a></span>()</code> |
| <div class="block">Returns a single Subject's principals retrieved from all configured Realms as a Set, or an empty Set if there |
| are not any principals.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><T> <a href="http://java.sun.com/javase/6/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><T></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#byType-java.lang.Class-">byType</a></span>(<a href="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><T> type)</code> |
| <div class="block">Returns all principals assignable from the specified type, or an empty Collection if no principals of that |
| type are contained.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="http://java.sun.com/javase/6/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#fromRealm-java.lang.String-">fromRealm</a></span>(<a href="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> realmName)</code> |
| <div class="block">Returns a single Subject's principals retrieved from the specified Realm <em>only</em> as a Collection, or an empty |
| Collection if there are not any principals from that realm.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#getPrimaryPrincipal--">getPrimaryPrincipal</a></span>()</code> |
| <div class="block">Returns the primary principal used application-wide to uniquely identify the owning account/Subject.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="http://java.sun.com/javase/6/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#getRealmNames--">getRealmNames</a></span>()</code> |
| <div class="block">Returns the realm names that this collection has principals for.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#isEmpty--">isEmpty</a></span>()</code> |
| <div class="block">Returns <code>true</code> if this collection is empty, <code>false</code> otherwise.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><T> T</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/subject/PrincipalCollection.html#oneByType-java.lang.Class-">oneByType</a></span>(<a href="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><T> type)</code> |
| <div class="block">Returns the first discovered principal assignable from the specified type, or <code>null</code> if there are none |
| of the specified type.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
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| <h3>Methods inherited from interface java.lang.<a href="http://java.sun.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a></h3> |
| <code><a href="http://java.sun.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true#forEach-java.util.function.Consumer-" title="class or interface in java.lang">forEach</a>, <a href="http://java.sun.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true#iterator--" title="class or interface in java.lang">iterator</a>, <a href="http://java.sun.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true#spliterator--" title="class or interface in java.lang">spliterator</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
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| <!-- ============ METHOD DETAIL ========== --> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="getPrimaryPrincipal--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getPrimaryPrincipal</h4> |
| <pre><a href="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> <a href="../../../../src-html/org/apache/shiro/subject/PrincipalCollection.html#line.77">getPrimaryPrincipal</a>()</pre> |
| <div class="block">Returns the primary principal used application-wide to uniquely identify the owning account/Subject. |
| <p/> |
| The value is usually always a uniquely identifying attribute specific to the data source that retrieved the |
| account data. Some examples: |
| <ul> |
| <li>a <a href="http://java.sun.com/javase/6/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util"><code>UUID</code></a></li> |
| <li>a <code>long</code> value such as a surrogate primary key in a relational database</li> |
| <li>an LDAP UUID or static DN</li> |
| <li>a String username unique across all user accounts</li> |
| </ul> |
| <h3>Multi-Realm Applications</h3> |
| In a single-<code>Realm</code> application, typically there is only ever one unique principal to retain and that |
| is the value returned from this method. However, in a multi-<code>Realm</code> application, where the |
| <code>PrincipalCollection</code> might retain principals across more than one realm, the value returned from this |
| method should be the single principal that uniquely identifies the subject for the entire application. |
| <p/> |
| That value is of course application specific, but most applications will typically choose one of the primary |
| principals from one of the <code>Realm</code>s. |
| <p/> |
| Shiro's default implementations of this interface make this |
| assumption by usually simply returning <a href="http://java.sun.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true#iterator--" title="class or interface in java.lang"><code>Iterable.iterator()</code></a>.<a href="http://java.sun.com/javase/6/docs/api/java/util/Iterator.html?is-external=true#next--" title="class or interface in java.util"><code>next()</code></a>, which just |
| returns the first returned principal obtained from the first consulted/configured <code>Realm</code> during the |
| authentication attempt. This means in a multi-<code>Realm</code> application, <code>Realm</code> configuraiton order |
| matters if you want to retain this default heuristic. |
| <p/> |
| If this heuristic is not sufficient, most Shiro end-users will need to implement a custom |
| <a href="../../../../org/apache/shiro/authc/pam/AuthenticationStrategy.html" title="interface in org.apache.shiro.authc.pam"><code>AuthenticationStrategy</code></a>. An <code>AuthenticationStrategy</code> has exact control |
| over the <a href="../../../../org/apache/shiro/subject/PrincipalCollection.html" title="interface in org.apache.shiro.subject"><code>PrincipalCollection</code></a> returned at the end of an authentication attempt via the |
| <code>AuthenticationStrategy#<a href="../../../../org/apache/shiro/authc/pam/AuthenticationStrategy.html#afterAllAttempts-org.apache.shiro.authc.AuthenticationToken-org.apache.shiro.authc.AuthenticationInfo-"><code>afterAllAttempts</code></a></code> |
| implementation.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the primary principal used to uniquely identify the owning account/Subject</dd> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.0</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="oneByType-java.lang.Class-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>oneByType</h4> |
| <pre><T> T <a href="../../../../src-html/org/apache/shiro/subject/PrincipalCollection.html#line.88">oneByType</a>(<a href="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><T> type)</pre> |
| <div class="block">Returns the first discovered principal assignable from the specified type, or <code>null</code> if there are none |
| of the specified type. |
| <p/> |
| Note that this will return <code>null</code> if the 'owning' subject has not yet logged in.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>type</code> - the type of the principal that should be returned.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a principal of the specified type or <code>null</code> if there isn't one of the specified type.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="byType-java.lang.Class-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>byType</h4> |
| <pre><T> <a href="http://java.sun.com/javase/6/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><T> <a href="../../../../src-html/org/apache/shiro/subject/PrincipalCollection.html#line.100">byType</a>(<a href="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><T> type)</pre> |
| <div class="block">Returns all principals assignable from the specified type, or an empty Collection if no principals of that |
| type are contained. |
| <p/> |
| Note that this will return an empty Collection if the 'owning' subject has not yet logged in.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>type</code> - the type of the principals that should be returned.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a Collection of principals that are assignable from the specified type, or |
| an empty Collection if no principals of this type are associated.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="asList--"> |
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| </a> |
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| <h4>asList</h4> |
| <pre><a href="http://java.sun.com/javase/6/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a> <a href="../../../../src-html/org/apache/shiro/subject/PrincipalCollection.html#line.110">asList</a>()</pre> |
| <div class="block">Returns a single Subject's principals retrieved from all configured Realms as a List, or an empty List if |
| there are not any principals. |
| <p/> |
| Note that this will return an empty List if the 'owning' subject has not yet logged in.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a single Subject's principals retrieved from all configured Realms as a List.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="asSet--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>asSet</h4> |
| <pre><a href="http://java.sun.com/javase/6/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a> <a href="../../../../src-html/org/apache/shiro/subject/PrincipalCollection.html#line.120">asSet</a>()</pre> |
| <div class="block">Returns a single Subject's principals retrieved from all configured Realms as a Set, or an empty Set if there |
| are not any principals. |
| <p/> |
| Note that this will return an empty Set if the 'owning' subject has not yet logged in.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a single Subject's principals retrieved from all configured Realms as a Set.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="fromRealm-java.lang.String-"> |
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| <h4>fromRealm</h4> |
| <pre><a href="http://java.sun.com/javase/6/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a> <a href="../../../../src-html/org/apache/shiro/subject/PrincipalCollection.html#line.132">fromRealm</a>(<a href="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> realmName)</pre> |
| <div class="block">Returns a single Subject's principals retrieved from the specified Realm <em>only</em> as a Collection, or an empty |
| Collection if there are not any principals from that realm. |
| <p/> |
| Note that this will return an empty Collection if the 'owning' subject has not yet logged in.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>realmName</code> - the name of the Realm from which the principals were retrieved.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the Subject's principals from the specified Realm only as a Collection or an empty Collection if there |
| are not any principals from that realm.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRealmNames--"> |
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| <h4>getRealmNames</h4> |
| <pre><a href="http://java.sun.com/javase/6/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> <a href="../../../../src-html/org/apache/shiro/subject/PrincipalCollection.html#line.139">getRealmNames</a>()</pre> |
| <div class="block">Returns the realm names that this collection has principals for.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the names of realms that this collection has one or more principals for.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>isEmpty</h4> |
| <pre>boolean <a href="../../../../src-html/org/apache/shiro/subject/PrincipalCollection.html#line.146">isEmpty</a>()</pre> |
| <div class="block">Returns <code>true</code> if this collection is empty, <code>false</code> otherwise.</div> |
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