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<A NAME="Expression()"><!-- --></A><H3>
Expression</H3>
<PRE>
public <B>Expression</B>()</PRE>
<DL>
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<A NAME="getExpressionString()"><!-- --></A><H3>
getExpressionString</H3>
<PRE>
public abstract <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getExpressionString</B>()</PRE>
<DL>
<DD>Returns the original String used to create this <code>Expression</code>,
 unmodified.

 <p>This is used for debugging purposes but also for the purposes
 of comparison (e.g. to ensure the expression in a configuration
 file has not changed).</p>

 <p>This method does not provide sufficient information to
 re-create an expression. Two different expressions can have exactly
 the same expression string but different function mappings.
 Serialization should be used to save and restore the state of an
 <code>Expression</code>.</p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The original expression String.</DL>
</DD>
</DL>
<HR>

<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
equals</H3>
<PRE>
public abstract boolean <B>equals</B>(<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;obj)</PRE>
<DL>
<DD>Determines whether the specified object is equal to this
 <code>Expression</code>.

 <p>The result is <code>true</code> if and only if the argument is
 not <code>null</code>, is an <code>Expression</code> object that
 is the of the same type (<code>ValueExpression</code> or
 <code>MethodExpression</code>), and has an identical parsed
 representation.</p>

 <p>Note that two expressions can be equal if their expression
 Strings are different. For example, <code>${fn1:foo()}</code>
 and <code>${fn2:foo()}</code> are equal if their corresponding
 <code>FunctionMapper</code>s mapped <code>fn1:foo</code> and
 <code>fn2:foo</code> to the same method.</p>
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang">equals</A></CODE> in class <CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>obj</CODE> - the <code>Object</code> to test for equality.
<DT><B>Returns:</B><DD><code>true</code> if <code>obj</code> equals this
     <code>Expression</code>; <code>false</code> otherwise.<DT><B>See Also:</B><DD><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/util/Hashtable.html" title="class or interface in java.util"><CODE>Hashtable</CODE></A>, 
<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang"><CODE>Object.equals(java.lang.Object)</CODE></A></DL>
</DD>
</DL>
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<A NAME="hashCode()"><!-- --></A><H3>
hashCode</H3>
<PRE>
public abstract int <B>hashCode</B>()</PRE>
<DL>
<DD>Returns the hash code for this <code>Expression</code>.

 <p>See the note in the <A HREF="../../javax/el/Expression.html#equals(java.lang.Object)"><CODE>equals(java.lang.Object)</CODE></A> method on how two expressions
 can be equal if their expression Strings are different. Recall that
 if two objects are equal according to the <code>equals(Object)</code>
 method, then calling the <code>hashCode</code> method on each of the
 two objects must produce the same integer result. Implementations must
 take special note and implement <code>hashCode</code> correctly.</p>
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang">hashCode</A></CODE> in class <CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The hash code for this <code>Expression</code>.<DT><B>See Also:</B><DD><A HREF="../../javax/el/Expression.html#equals(java.lang.Object)"><CODE>equals(java.lang.Object)</CODE></A>, 
<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/util/Hashtable.html" title="class or interface in java.util"><CODE>Hashtable</CODE></A>, 
<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang"><CODE>Object.hashCode()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="isLiteralText()"><!-- --></A><H3>
isLiteralText</H3>
<PRE>
public abstract boolean <B>isLiteralText</B>()</PRE>
<DL>
<DD>Returns whether this expression was created from only literal text.

 <p>This method must return <code>true</code> if and only if the
 expression string this expression was created from contained no
 unescaped EL delimeters (<code>${...}</code> or
 <code>#{...}</code>).</p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD><code>true</code> if this expression was created from only
     literal text; <code>false</code> otherwise.</DL>
</DD>
</DL>
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