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| EventSubject (Cayenne API Documentation - v.1.2) |
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| org.objectstyle.cayenne.event</FONT> |
| <BR> |
| Class EventSubject</H2> |
| <PRE> |
| java.lang.Object |
| <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.objectstyle.cayenne.event.EventSubject</B> |
| </PRE> |
| <DL> |
| <DT><B>All Implemented Interfaces:</B> <DD>java.io.Serializable</DD> |
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| <DL> |
| <DT><PRE>public class <B>EventSubject</B><DT>extends java.lang.Object<DT>implements java.io.Serializable</DL> |
| </PRE> |
| |
| <P> |
| This class encapsulates the String that is used to identify the <em>subject</em> that |
| a listener is interested in. Using plain Strings causes several severe problems: |
| <ul> |
| <li>it's easy to misspell a subject, leading to undesired behaviour at runtime that is |
| hard to debug.</li> |
| <li>in systems with many different subjects there is no safeguard for defining the |
| same subject twice for different purposes. This is especially true in a distributed |
| setting. |
| </ul> |
| <P> |
| |
| <P> |
| <DL> |
| <DT><B>Author:</B></DT> |
| <DD>Dirk Olmes, Holger Hoffstaette</DD> |
| <DT><B>See Also:</B><DD><A HREF="../../../../serialized-form.html#org.objectstyle.cayenne.event.EventSubject">Serialized Form</A></DL> |
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| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>protected </CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/objectstyle/cayenne/event/EventSubject.html#EventSubject(java.lang.String)">EventSubject</A></B>(java.lang.String fullSubjectName)</CODE> |
| |
| <BR> |
| Protected constructor for new subjects.</TD> |
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| <CODE> boolean</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/objectstyle/cayenne/event/EventSubject.html#equals(java.lang.Object)">equals</A></B>(java.lang.Object obj)</CODE> |
| |
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| </TD> |
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| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>static <A HREF="../../../../org/objectstyle/cayenne/event/EventSubject.html" title="class in org.objectstyle.cayenne.event">EventSubject</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/objectstyle/cayenne/event/EventSubject.html#getSubject(java.lang.Class, java.lang.String)">getSubject</A></B>(java.lang.Class subjectOwner, |
| java.lang.String subjectName)</CODE> |
| |
| <BR> |
| Returns an event subject identified by the given owner and subject name.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> java.lang.String</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/objectstyle/cayenne/event/EventSubject.html#getSubjectName()">getSubjectName</A></B>()</CODE> |
| |
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| <CODE> int</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/objectstyle/cayenne/event/EventSubject.html#hashCode()">hashCode</A></B>()</CODE> |
| |
| <BR> |
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| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> java.lang.String</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/objectstyle/cayenne/event/EventSubject.html#toString()">toString</A></B>()</CODE> |
| |
| <BR> |
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| <TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH> |
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| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE>clone, finalize, getClass, notify, notifyAll, wait, wait, wait</CODE></TD> |
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| |
| <A NAME="EventSubject(java.lang.String)"><!-- --></A><H3> |
| EventSubject</H3> |
| <PRE> |
| protected <B>EventSubject</B>(java.lang.String fullSubjectName)</PRE> |
| <DL> |
| <DD>Protected constructor for new subjects. |
| <P> |
| <DL> |
| <DT><B>Parameters:</B><DD><CODE>fullSubjectName</CODE> - the name of the new subject to be created</DL> |
| </DL> |
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| |
| <A NAME="getSubject(java.lang.Class, java.lang.String)"><!-- --></A><H3> |
| getSubject</H3> |
| <PRE> |
| public static <A HREF="../../../../org/objectstyle/cayenne/event/EventSubject.html" title="class in org.objectstyle.cayenne.event">EventSubject</A> <B>getSubject</B>(java.lang.Class subjectOwner, |
| java.lang.String subjectName)</PRE> |
| <DL> |
| <DD>Returns an event subject identified by the given owner and subject name. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| <DT><B>Parameters:</B><DD><CODE>subjectOwner</CODE> - the Class used for uniquely identifying this subject<DD><CODE>subjectName</CODE> - a String used as name, e.g. "MyEventTopic" |
| <DT><B>Throws:</B> |
| <DD><CODE>java.lang.IllegalArgumentException</CODE> - if subjectOwner/subjectName are <code>null</code> |
| or subjectName is empty.</DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="equals(java.lang.Object)"><!-- --></A><H3> |
| equals</H3> |
| <PRE> |
| public boolean <B>equals</B>(java.lang.Object obj)</PRE> |
| <DL> |
| <DD><DL> |
| <DT><B>Overrides:</B><DD><CODE>equals</CODE> in class <CODE>java.lang.Object</CODE></DL> |
| </DD> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="hashCode()"><!-- --></A><H3> |
| hashCode</H3> |
| <PRE> |
| public int <B>hashCode</B>()</PRE> |
| <DL> |
| <DD><DL> |
| <DT><B>Overrides:</B><DD><CODE>hashCode</CODE> in class <CODE>java.lang.Object</CODE></DL> |
| </DD> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="getSubjectName()"><!-- --></A><H3> |
| getSubjectName</H3> |
| <PRE> |
| public java.lang.String <B>getSubjectName</B>()</PRE> |
| <DL> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="toString()"><!-- --></A><H3> |
| toString</H3> |
| <PRE> |
| public java.lang.String <B>toString</B>()</PRE> |
| <DL> |
| <DD><DL> |
| <DT><B>Overrides:</B><DD><CODE>toString</CODE> in class <CODE>java.lang.Object</CODE></DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>a String in the form <code><ClassName 0x123456> SomeName</code><DT><B>See Also:</B><DD><CODE>Object.toString()</CODE></DL> |
| </DD> |
| </DL> |
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