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ExpressionList (JoSQL 2.2 - SQL for Java Objects)
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org.josql.expressions</FONT>
<BR>
Class ExpressionList</H2>
<PRE>
<A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions">org.josql.expressions.Expression</A>
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../org/josql/expressions/ValueExpression.html" title="class in org.josql.expressions">org.josql.expressions.ValueExpression</A>
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>org.josql.expressions.ExpressionList</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>ExpressionList</B><DT>extends <A HREF="../../../org/josql/expressions/ValueExpression.html" title="class in org.josql.expressions">ValueExpression</A></DL>
</PRE>
<P>
This class represents a list of expressions used within a SQL statement.
<p>
Expressions lists are created using pairs of "[]" brackets, i.e.
<pre>
[toString, 10, true]
</pre>
Would create a list of expressions that should be treated as a unit.
<p>
Since expression lists are also expressions it is possible to nest them to the nth degree, if desired.
i.e.
<pre>
[toString, [1, 2, 3, 4], [true, true]]
</pre>
<P>
<P>
<HR>
<P>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<TD><CODE><B><A HREF="../../../org/josql/expressions/ExpressionList.html#ExpressionList()">ExpressionList</A></B>()</CODE>
<BR>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/josql/expressions/ExpressionList.html#addExpression(org.josql.expressions.Expression)">addExpression</A></B>(<A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions">Expression</A> expr)</CODE>
<BR>
Add an expression to the list.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/josql/expressions/ExpressionList.html#evaluate(java.lang.Object, org.josql.Query)">evaluate</A></B>(<A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> o,
<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)</CODE>
<BR>
Evaluates the value of this expression list.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/josql/expressions/ExpressionList.html#getExpectedReturnType(org.josql.Query)">getExpectedReturnType</A></B>(<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)</CODE>
<BR>
Get the expected return type, which is <A HREF="/usr/share/doc/default-jdk-doc/api/java/util/List.html?is-external=true" title="class or interface in java.util"><CODE>List</CODE></A>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="/usr/share/doc/default-jdk-doc/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/josql/expressions/ExpressionList.html#getExpressions()">getExpressions</A></B>()</CODE>
<BR>
Returns the expressions, a list of <A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions"><CODE>Expression</CODE></A> objects.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/josql/expressions/ExpressionList.html#getValue(java.lang.Object, org.josql.Query)">getValue</A></B>(<A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> o,
<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)</CODE>
<BR>
Gets the value of the expressions, this will return a list of the values for
each of the expressions in the list.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/josql/expressions/ExpressionList.html#hasFixedResult(org.josql.Query)">hasFixedResult</A></B>(<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)</CODE>
<BR>
Returns <code>true</code> if this expression list is empty (no expressions) or
if ALL of the expressions have a fixed result.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/josql/expressions/ExpressionList.html#init(org.josql.Query)">init</A></B>(<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)</CODE>
<BR>
Initialises this expression list, each expression in the list is inited.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/josql/expressions/ExpressionList.html#isTrue(java.lang.Object, org.josql.Query)">isTrue</A></B>(<A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> o,
<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)</CODE>
<BR>
Returns <code>true</code> if one of the expression values is non-null.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/josql/expressions/ExpressionList.html#setExpressions(java.util.List)">setExpressions</A></B>(<A HREF="/usr/share/doc/default-jdk-doc/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</A> exprs)</CODE>
<BR>
Set the expressions.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="/usr/share/doc/default-jdk-doc/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="../../../org/josql/expressions/ExpressionList.html#toString()">toString</A></B>()</CODE>
<BR>
Returns a string version of this expression list.</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_org.josql.expressions.Expression"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class org.josql.expressions.<A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions">Expression</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../org/josql/expressions/Expression.html#isBracketed()">isBracketed</A>, <A HREF="../../../org/josql/expressions/Expression.html#setBracketed(boolean)">setBracketed</A></CODE></TD>
</TR>
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<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
</TR>
</TABLE>
<P>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
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</TABLE>
<A NAME="ExpressionList()"><!-- --></A><H3>
ExpressionList</H3>
<PRE>
public <B>ExpressionList</B>()</PRE>
<DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
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<A NAME="getExpectedReturnType(org.josql.Query)"><!-- --></A><H3>
getExpectedReturnType</H3>
<PRE>
public <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A> <B>getExpectedReturnType</B>(<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)</PRE>
<DL>
<DD>Get the expected return type, which is <A HREF="/usr/share/doc/default-jdk-doc/api/java/util/List.html?is-external=true" title="class or interface in java.util"><CODE>List</CODE></A>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/josql/expressions/Expression.html#getExpectedReturnType(org.josql.Query)">getExpectedReturnType</A></CODE> in class <CODE><A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions">Expression</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>q</CODE> - The Query object.
<DT><B>Returns:</B><DD><A HREF="/usr/share/doc/default-jdk-doc/api/java/util/List.html?is-external=true" title="class or interface in java.util"><CODE>List</CODE></A>.</DL>
</DD>
</DL>
<HR>
<A NAME="init(org.josql.Query)"><!-- --></A><H3>
init</H3>
<PRE>
public void <B>init</B>(<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)
throws <A HREF="../../../org/josql/QueryParseException.html" title="class in org.josql">QueryParseException</A></PRE>
<DL>
<DD>Initialises this expression list, each expression in the list is inited.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/josql/expressions/Expression.html#init(org.josql.Query)">init</A></CODE> in class <CODE><A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions">Expression</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>q</CODE> - The Query object.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../org/josql/QueryParseException.html" title="class in org.josql">QueryParseException</A></CODE> - If one of the expressions cannot be inited.</DL>
</DD>
</DL>
<HR>
<A NAME="getExpressions()"><!-- --></A><H3>
getExpressions</H3>
<PRE>
public <A HREF="/usr/share/doc/default-jdk-doc/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</A> <B>getExpressions</B>()</PRE>
<DL>
<DD>Returns the expressions, a list of <A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions"><CODE>Expression</CODE></A> objects.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>The expressions.</DL>
</DD>
</DL>
<HR>
<A NAME="addExpression(org.josql.expressions.Expression)"><!-- --></A><H3>
addExpression</H3>
<PRE>
public void <B>addExpression</B>(<A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions">Expression</A> expr)</PRE>
<DL>
<DD>Add an expression to the list.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>expr</CODE> - The expression.</DL>
</DD>
</DL>
<HR>
<A NAME="setExpressions(java.util.List)"><!-- --></A><H3>
setExpressions</H3>
<PRE>
public void <B>setExpressions</B>(<A HREF="/usr/share/doc/default-jdk-doc/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</A> exprs)</PRE>
<DL>
<DD>Set the expressions.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>exprs</CODE> - The expressions.</DL>
</DD>
</DL>
<HR>
<A NAME="getValue(java.lang.Object, org.josql.Query)"><!-- --></A><H3>
getValue</H3>
<PRE>
public <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> <B>getValue</B>(<A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> o,
<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)
throws <A HREF="../../../org/josql/QueryExecutionException.html" title="class in org.josql">QueryExecutionException</A></PRE>
<DL>
<DD>Gets the value of the expressions, this will return a list of the values for
each of the expressions in the list. In essence <A HREF="../../../org/josql/expressions/Expression.html#getValue(java.lang.Object, org.josql.Query)"><CODE>Expression.getValue(Object,Query)</CODE></A>
is called on each of the expressions.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../org/josql/expressions/ValueExpression.html#getValue(java.lang.Object, org.josql.Query)">getValue</A></CODE> in class <CODE><A HREF="../../../org/josql/expressions/ValueExpression.html" title="class in org.josql.expressions">ValueExpression</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - The current object.<DD><CODE>q</CODE> - The Query object.
<DT><B>Returns:</B><DD>A list of the values, if there are no expressions in the list then an empty list is returned.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../org/josql/QueryExecutionException.html" title="class in org.josql">QueryExecutionException</A></CODE> - If something goes wrong the acquisition of the values.</DL>
</DD>
</DL>
<HR>
<A NAME="isTrue(java.lang.Object, org.josql.Query)"><!-- --></A><H3>
isTrue</H3>
<PRE>
public boolean <B>isTrue</B>(<A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> o,
<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)
throws <A HREF="../../../org/josql/QueryExecutionException.html" title="class in org.josql">QueryExecutionException</A></PRE>
<DL>
<DD>Returns <code>true</code> if one of the expression values is non-null.
Note: for efficiency this method calls <A HREF="../../../org/josql/expressions/Expression.html#getValue(java.lang.Object, org.josql.Query)"><CODE>Expression.getValue(Object,Query)</CODE></A>
on each expression directly and returns <code>true</code> for the first non-null
value found, as such if any of your expressions triggers side-effects then this
method should not be used.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/josql/expressions/Expression.html#isTrue(java.lang.Object, org.josql.Query)">isTrue</A></CODE> in class <CODE><A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions">Expression</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - The current object.<DD><CODE>q</CODE> - The Query object.
<DT><B>Returns:</B><DD><code>true</code> if one of the expression values is non-null.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../org/josql/QueryExecutionException.html" title="class in org.josql">QueryExecutionException</A></CODE> - If a problem occurs during evaluation.</DL>
</DD>
</DL>
<HR>
<A NAME="evaluate(java.lang.Object, org.josql.Query)"><!-- --></A><H3>
evaluate</H3>
<PRE>
public <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> <B>evaluate</B>(<A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> o,
<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)
throws <A HREF="../../../org/josql/QueryExecutionException.html" title="class in org.josql">QueryExecutionException</A></PRE>
<DL>
<DD>Evaluates the value of this expression list. This is just a thin-wrapper around:
<A HREF="../../../org/josql/expressions/ExpressionList.html#getValue(java.lang.Object, org.josql.Query)"><CODE>getValue(Object,Query)</CODE></A>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/josql/expressions/ValueExpression.html#evaluate(java.lang.Object, org.josql.Query)">evaluate</A></CODE> in class <CODE><A HREF="../../../org/josql/expressions/ValueExpression.html" title="class in org.josql.expressions">ValueExpression</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - The current object.<DD><CODE>q</CODE> - The Query object.
<DT><B>Returns:</B><DD>The value of this expression list.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../org/josql/QueryExecutionException.html" title="class in org.josql">QueryExecutionException</A></CODE> - If there is a problem getting the values.</DL>
</DD>
</DL>
<HR>
<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public <A HREF="/usr/share/doc/default-jdk-doc/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>toString</B>()</PRE>
<DL>
<DD>Returns a string version of this expression list.
Returns in the form: "[" Expression [ , Expression ]* "]".
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/josql/expressions/Expression.html#toString()">toString</A></CODE> in class <CODE><A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions">Expression</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>A string version of the expression list.</DL>
</DD>
</DL>
<HR>
<A NAME="hasFixedResult(org.josql.Query)"><!-- --></A><H3>
hasFixedResult</H3>
<PRE>
public boolean <B>hasFixedResult</B>(<A HREF="../../../org/josql/Query.html" title="class in org.josql">Query</A> q)</PRE>
<DL>
<DD>Returns <code>true</code> if this expression list is empty (no expressions) or
if ALL of the expressions have a fixed result.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/josql/expressions/Expression.html#hasFixedResult(org.josql.Query)">hasFixedResult</A></CODE> in class <CODE><A HREF="../../../org/josql/expressions/Expression.html" title="class in org.josql.expressions">Expression</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>q</CODE> - The Query object.
<DT><B>Returns:</B><DD>See description.</DL>
</DD>
</DL>
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