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| Interface Scope</H2> |
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| <DT><PRE>public interface <B>Scope</B></DL> |
| </PRE> |
| |
| <P> |
| A scope is a level of visibility that instances provided by Guice may have. |
| By default, an instance created by the <A HREF="../../../com/google/inject/Injector.html" title="interface in com.google.inject"><CODE>Injector</CODE></A> has <i>no scope</i>, |
| meaning it has no state from the framework's perspective -- the |
| <code>Injector</code> creates it, injects it once into the class that required it, |
| and then immediately forgets it. Associating a scope with a particular |
| binding allows the created instance to be "remembered" and possibly used |
| again for other injections. |
| |
| <p>An example of a scope is <A HREF="../../../com/google/inject/Scopes.html#SINGLETON"><CODE>Scopes.SINGLETON</CODE></A>. |
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| <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY=""> |
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| <TD NOWRAP><FONT SIZE="-1"> |
| <CODE><T> <A HREF="../../../com/google/inject/Provider.html" title="interface in com.google.inject">Provider</A><T></CODE></FONT></TD> |
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| </CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../com/google/inject/Scope.html#scope(com.google.inject.Key, com.google.inject.Provider)">scope</A></B>(<A HREF="../../../com/google/inject/Key.html" title="class in com.google.inject">Key</A><T> key, |
| <A HREF="../../../com/google/inject/Provider.html" title="interface in com.google.inject">Provider</A><T> unscoped)</CODE> |
| |
| <BR> |
| Scopes a provider.</TD> |
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| <CODE> <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></FONT></TD> |
| <TD><CODE><B><A HREF="../../../com/google/inject/Scope.html#toString()">toString</A></B>()</CODE> |
| |
| <BR> |
| A short but useful description of this scope.</TD> |
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| <A NAME="scope(com.google.inject.Key, com.google.inject.Provider)"><!-- --></A><H3> |
| scope</H3> |
| <PRE> |
| <T> <A HREF="../../../com/google/inject/Provider.html" title="interface in com.google.inject">Provider</A><T> <B>scope</B>(<A HREF="../../../com/google/inject/Key.html" title="class in com.google.inject">Key</A><T> key, |
| <A HREF="../../../com/google/inject/Provider.html" title="interface in com.google.inject">Provider</A><T> unscoped)</PRE> |
| <DL> |
| <DD>Scopes a provider. The returned provider returns objects from this scope. |
| If an object does not exist in this scope, the provider can use the given |
| unscoped provider to retrieve one. |
| |
| <p>Scope implementations are strongly encouraged to override |
| <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang"><CODE>Object.toString()</CODE></A> in the returned provider and include the backing |
| provider's <code>toString()</code> output. |
| <P> |
| <DD><DL> |
| <DT><B>Parameters:</B><DD><CODE>key</CODE> - binding key<DD><CODE>unscoped</CODE> - locates an instance when one doesn't already exist in this |
| scope. |
| <DT><B>Returns:</B><DD>a new provider which only delegates to the given unscoped provider |
| when an instance of the requested object doesn't already exist in this |
| scope</DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="toString()"><!-- --></A><H3> |
| toString</H3> |
| <PRE> |
| <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> <B>toString</B>()</PRE> |
| <DL> |
| <DD>A short but useful description of this scope. For comparison, the standard |
| scopes that ship with guice use the descriptions |
| <code>"Scopes.SINGLETON"</code>, <code>"ServletScopes.SESSION"</code> and |
| <code>"ServletScopes.REQUEST"</code>. |
| <P> |
| <DD><DL> |
| <DT><B>Overrides:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A></CODE> in class <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></DL> |
| </DD> |
| <DD><DL> |
| </DL> |
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