modelutil.html

开源项目smack的API文件

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns <CODE>true</CODE> if the specified <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html" title="class or interface in java.lang"><CODE>String</CODE></A> is not
 <CODE>null</CODE> and has a length greater than zero.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/jivesoftware/smackx/workgroup/util/ModelUtil.html#hasNonNullElement(java.lang.Object[])">hasNonNullElement</A></B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[]&nbsp;array)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns <CODE>true</CODE> if the specified array is not null
 and contains a non-null element.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/jivesoftware/smackx/workgroup/util/ModelUtil.html#hasStringChanged(java.lang.String, java.lang.String)">hasStringChanged</A></B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;oldString,
                 <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;newString)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Determines if a string has been changed.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/List.html" title="class or interface in java.util">List</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/jivesoftware/smackx/workgroup/util/ModelUtil.html#iteratorAsList(java.util.Iterator)">iteratorAsList</A></B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Iterator.html" title="class or interface in java.util">Iterator</A>&nbsp;i)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Build a List of all elements in an Iterator.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/jivesoftware/smackx/workgroup/util/ModelUtil.html#nullifyIfEmpty(java.lang.String)">nullifyIfEmpty</A></B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;s)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns <CODE>null</CODE> if the specified string is empty or
 <CODE>null</CODE>.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/jivesoftware/smackx/workgroup/util/ModelUtil.html#nullifyingToString(java.lang.Object)">nullifyingToString</A></B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;o)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns <CODE>null</CODE> if the specified object is null
 or if its <CODE>toString()</CODE> representation is empty.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Iterator.html" title="class or interface in java.util">Iterator</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/jivesoftware/smackx/workgroup/util/ModelUtil.html#reverseListIterator(java.util.ListIterator)">reverseListIterator</A></B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/ListIterator.html" title="class or interface in java.util">ListIterator</A>&nbsp;i)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates an Iterator that is the reverse of a ListIterator.</TD>
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&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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<!-- ============ METHOD DETAIL ========== -->

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<B>Method Detail</B></FONT></TH>
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<A NAME="areEqual(java.lang.Object, java.lang.Object)"><!-- --></A><H3>
areEqual</H3>
<PRE>
public static final boolean <B>areEqual</B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;o1,
                                     <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;o2)</PRE>
<DL>
<DD>This is a utility method that compares two objects when one or
 both of the objects might be <CODE>null</CODE>  The result of
 this method is determined as follows:
 <OL>
 <LI>If <CODE>o1</CODE> and <CODE>o2</CODE> are the same object
 according to the <CODE>==</CODE> operator, return
 <CODE>true</CODE>.
 <LI>Otherwise, if either <CODE>o1</CODE> or <CODE>o2</CODE> is
 <CODE>null</CODE>, return <CODE>false</CODE>.
 <LI>Otherwise, return <CODE>o1.equals(o2)</CODE>.
 </OL>
 <p/>
 This method produces the exact logically inverted result as the
 <A HREF="../../../../../org/jivesoftware/smackx/workgroup/util/ModelUtil.html#areDifferent(java.lang.Object, java.lang.Object)"><CODE>areDifferent(Object, Object)</CODE></A> method.<P>
 <p/>
 For array types, one of the <CODE>equals</CODE> methods in
 <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Arrays.html" title="class or interface in java.util"><CODE>Arrays</CODE></A> should be used instead of this method.
 Note that arrays with more than one dimension will require some
 custom code in order to implement <CODE>equals</CODE> properly.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="areBooleansEqual(java.lang.Boolean, java.lang.Boolean)"><!-- --></A><H3>
areBooleansEqual</H3>
<PRE>
public static final boolean <B>areBooleansEqual</B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Boolean.html" title="class or interface in java.lang">Boolean</A>&nbsp;b1,
                                             <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Boolean.html" title="class or interface in java.lang">Boolean</A>&nbsp;b2)</PRE>
<DL>
<DD>This is a utility method that compares two Booleans when one or
 both of the objects might be <CODE>null</CODE>  The result of
 this method is determined as follows:
 <OL>
 <LI>If <CODE>b1</CODE> and <CODE>b2</CODE> are both TRUE or
 neither <CODE>b1</CODE> nor <CODE>b2</CODE> is TRUE,
 return <CODE>true</CODE>.
 <LI>Otherwise, return <CODE>false</CODE>.
 </OL>
 <p/>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="areDifferent(java.lang.Object, java.lang.Object)"><!-- --></A><H3>
areDifferent</H3>
<PRE>
public static final boolean <B>areDifferent</B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;o1,
                                         <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;o2)</PRE>
<DL>
<DD>This is a utility method that compares two objects when one or
 both of the objects might be <CODE>null</CODE>.  The result
 returned by this method is determined as follows:
 <OL>
 <LI>If <CODE>o1</CODE> and <CODE>o2</CODE> are the same object
 according to the <CODE>==</CODE> operator, return
 <CODE>false</CODE>.
 <LI>Otherwise, if either <CODE>o1</CODE> or <CODE>o2</CODE> is
 <CODE>null</CODE>, return <CODE>true</CODE>.
 <LI>Otherwise, return <CODE>!o1.equals(o2)</CODE>.
 </OL>
 <p/>
 This method produces the exact logically inverted result as the
 <A HREF="../../../../../org/jivesoftware/smackx/workgroup/util/ModelUtil.html#areEqual(java.lang.Object, java.lang.Object)"><CODE>areEqual(Object, Object)</CODE></A> method.<P>
 <p/>
 For array types, one of the <CODE>equals</CODE> methods in
 <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Arrays.html" title="class or interface in java.util"><CODE>Arrays</CODE></A> should be used instead of this method.
 Note that arrays with more than one dimension will require some
 custom code in order to implement <CODE>equals</CODE> properly.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="areBooleansDifferent(java.lang.Boolean, java.lang.Boolean)"><!-- --></A><H3>
areBooleansDifferent</H3>
<PRE>
public static final boolean <B>areBooleansDifferent</B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Boolean.html" title="class or interface in java.lang">Boolean</A>&nbsp;b1,
                                                 <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Boolean.html" title="class or interface in java.lang">Boolean</A>&nbsp;b2)</PRE>
<DL>
<DD>This is a utility method that compares two Booleans when one or
 both of the objects might be <CODE>null</CODE>  The result of
 this method is determined as follows:
 <OL>
 <LI>If <CODE>b1</CODE> and <CODE>b2</CODE> are both TRUE or
 neither <CODE>b1</CODE> nor <CODE>b2</CODE> is TRUE,
 return <CODE>false</CODE>.
 <LI>Otherwise, return <CODE>true</CODE>.
 </OL>
 <p/>
 This method produces the exact logically inverted result as the
 <A HREF="../../../../../org/jivesoftware/smackx/workgroup/util/ModelUtil.html#areBooleansEqual(java.lang.Boolean, java.lang.Boolean)"><CODE>areBooleansEqual(Boolean, Boolean)</CODE></A> method.<P>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="hasNonNullElement(java.lang.Object[])"><!-- --></A><H3>
hasNonNullElement</H3>
<PRE>
public static final boolean <B>hasNonNullElement</B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[]&nbsp;array)</PRE>
<DL>
<DD>Returns <CODE>true</CODE> if the specified array is not null
 and contains a non-null element.  Returns <CODE>false</CODE>
 if the array is null or if all the array elements are null.
<P>
<DD><DL>