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Until (Gson 2.3.1 API)
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com.google.gson.annotations</FONT>
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Annotation Type Until</H2>
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<DT><PRE><FONT SIZE="-1"><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/annotation/Retention.html?is-external=true" title="class or interface in java.lang.annotation">@Retention</A>(<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/annotation/Retention.html?is-external=true#value()" title="class or interface in java.lang.annotation">value</A>=<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/annotation/RetentionPolicy.html?is-external=true#RUNTIME" title="class or interface in java.lang.annotation">RUNTIME</A>)
<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/annotation/Target.html?is-external=true" title="class or interface in java.lang.annotation">@Target</A>(<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/annotation/Target.html?is-external=true#value()" title="class or interface in java.lang.annotation">value</A>={<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/annotation/ElementType.html?is-external=true#FIELD" title="class or interface in java.lang.annotation">FIELD</A>,<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/annotation/ElementType.html?is-external=true#TYPE" title="class or interface in java.lang.annotation">TYPE</A>})
</FONT>public @interface <B>Until</B></DL>
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<P>
An annotation that indicates the version number until a member or a type should be present.
Basically, if Gson is created with a version number that exceeds the value stored in the
<code>Until</code> annotation then the field will be ignored from the JSON output. This annotation
is useful to manage versioning of your JSON classes for a web-service.
<p>
This annotation has no effect unless you build <A HREF="../../../../com/google/gson/Gson.html" title="class in com.google.gson"><CODE>Gson</CODE></A> with a
<A HREF="../../../../com/google/gson/GsonBuilder.html" title="class in com.google.gson"><CODE>GsonBuilder</CODE></A> and invoke
<A HREF="../../../../com/google/gson/GsonBuilder.html#setVersion(double)"><CODE>GsonBuilder.setVersion(double)</CODE></A> method.
<p>Here is an example of how this annotation is meant to be used:</p>
<pre>
public class User {
private String firstName;
private String lastName;
@Until(1.1) private String emailAddress;
@Until(1.1) private String password;
}
</pre>
<p>If you created Gson with <code>new Gson()</code>, the <code>toJson()</code> and <code>fromJson()</code>
methods will use all the fields for serialization and deserialization. However, if you created
Gson with <code>Gson gson = new GsonBuilder().setVersion(1.2).create()</code> then the
<code>toJson()</code> and <code>fromJson()</code> methods of Gson will exclude the <code>emailAddress</code>
and <code>password</code> fields from the example above, because the version number passed to the
GsonBuilder, <code>1.2</code>, exceeds the version number set on the <code>Until</code> annotation,
<code>1.1</code>, for those fields.
<P>
<P>
<DL>
<DT><B>Since:</B></DT>
<DD>1.3</DD>
<DT><B>Author:</B></DT>
<DD>Inderjeet Singh, Joel Leitch</DD>
</DL>
<HR>
<P>
<!-- =========== ANNOTATION TYPE REQUIRED MEMBER SUMMARY =========== -->
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<CODE> double</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/annotations/Until.html#value()">value</A></B></CODE>
<BR>
the value indicating a version number until this member
or type should be ignored.</TD>
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<A NAME="value()"><!-- --></A><H3>
value</H3>
<PRE>
public abstract double <B>value</B></PRE>
<DL>
<DD>the value indicating a version number until this member
or type should be ignored.
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