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SubsequenceTestFn
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com.saxonica.functions.extfn</FONT>
<BR>
Class SubsequenceTestFn</H2>
<PRE>
<A HREF="http://download.oracle.com/javase/6/docs/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="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html" title="class in net.sf.saxon.lib">net.sf.saxon.lib.ExtensionFunctionDefinition</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.saxonica.functions.extfn.SubsequenceTestFn</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://download.oracle.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</A></DD>
</DL>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.SubsequenceAfterFn.html" title="class in com.saxonica.functions.extfn">SubsequenceTestFn.SubsequenceAfterFn</A>, <A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.SubsequenceBeforeFn.html" title="class in com.saxonica.functions.extfn">SubsequenceTestFn.SubsequenceBeforeFn</A>, <A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.SubsequenceFromFn.html" title="class in com.saxonica.functions.extfn">SubsequenceTestFn.SubsequenceFromFn</A>, <A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.SubsequenceUntilFn.html" title="class in com.saxonica.functions.extfn">SubsequenceTestFn.SubsequenceUntilFn</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public abstract class <B>SubsequenceTestFn</B><DT>extends <A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html" title="class in net.sf.saxon.lib">ExtensionFunctionDefinition</A></DL>
</PRE>
<P>
Abstract class providing functionality common to functions saxon:subsequence-before,
saxon:subsequence-after etc;
contains the concrete implementations of these functions as inner subclasses
<P>
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../serialized-form.html#com.saxonica.functions.extfn.SubsequenceTestFn">Serialized Form</A></DL>
<HR>
<P>
<!-- ======== NESTED CLASS SUMMARY ======== -->
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<CODE>static class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.SubsequenceAfterFn.html" title="class in com.saxonica.functions.extfn">SubsequenceTestFn.SubsequenceAfterFn</A></B></CODE>
<BR>
Implement saxon:subsequence-after</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.SubsequenceBeforeFn.html" title="class in com.saxonica.functions.extfn">SubsequenceTestFn.SubsequenceBeforeFn</A></B></CODE>
<BR>
Implement saxon:subsequence-before</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.SubsequenceFromFn.html" title="class in com.saxonica.functions.extfn">SubsequenceTestFn.SubsequenceFromFn</A></B></CODE>
<BR>
Implement saxon:subsequence-from</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.SubsequenceUntilFn.html" title="class in com.saxonica.functions.extfn">SubsequenceTestFn.SubsequenceUntilFn</A></B></CODE>
<BR>
Implement saxon:subsequence-until</TD>
</TR>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#SubsequenceTestFn()">SubsequenceTestFn</A></B>()</CODE>
<BR>
</TD>
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<!-- ========== METHOD SUMMARY =========== -->
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected abstract <A HREF="../../../../net/sf/saxon/om/SequenceIterator.html" title="interface in net.sf.saxon.om">SequenceIterator</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#compute(net.sf.saxon.om.SequenceIterator, net.sf.saxon.om.FunctionItem, net.sf.saxon.expr.XPathContext)">compute</A></B>(<A HREF="../../../../net/sf/saxon/om/SequenceIterator.html" title="interface in net.sf.saxon.om">SequenceIterator</A> input,
<A HREF="../../../../net/sf/saxon/om/FunctionItem.html" title="interface in net.sf.saxon.om">FunctionItem</A> test,
<A HREF="../../../../net/sf/saxon/expr/XPathContext.html" title="interface in net.sf.saxon.expr">XPathContext</A> context)</CODE>
<BR>
The function that does the work, which must be implemented in subclasses</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../net/sf/saxon/value/SequenceType.html" title="class in net.sf.saxon.value">SequenceType</A>[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#getArgumentTypes()">getArgumentTypes</A></B>()</CODE>
<BR>
Get the required types for the arguments of this function.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#getMaximumNumberOfArguments()">getMaximumNumberOfArguments</A></B>()</CODE>
<BR>
Get the maximum number of arguments allowed by the function.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#getMinimumNumberOfArguments()">getMinimumNumberOfArguments</A></B>()</CODE>
<BR>
Get the minimum number of arguments required by the function</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../net/sf/saxon/value/SequenceType.html" title="class in net.sf.saxon.value">SequenceType</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#getResultType(net.sf.saxon.value.SequenceType[])">getResultType</A></B>(<A HREF="../../../../net/sf/saxon/value/SequenceType.html" title="class in net.sf.saxon.value">SequenceType</A>[] suppliedArgumentTypes)</CODE>
<BR>
Get the type of the result of the function</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionCall.html" title="class in net.sf.saxon.lib">ExtensionFunctionCall</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#makeCallExpression()">makeCallExpression</A></B>()</CODE>
<BR>
Create a call on this function.</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="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#trustResultType()">trustResultType</A></B>()</CODE>
<BR>
Ask whether the result actually returned by the function can be trusted,
or whether it should be checked against the declared type.</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_net.sf.saxon.lib.ExtensionFunctionDefinition"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class net.sf.saxon.lib.<A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html" title="class in net.sf.saxon.lib">ExtensionFunctionDefinition</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html#dependsOnFocus()">dependsOnFocus</A>, <A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html#getFunctionQName()">getFunctionQName</A>, <A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html#hasSideEffects()">hasSideEffects</A></CODE></TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://download.oracle.com/javase/6/docs/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="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://download.oracle.com/javase/6/docs/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 ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<B>Constructor Detail</B></FONT></TH>
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<A NAME="SubsequenceTestFn()"><!-- --></A><H3>
SubsequenceTestFn</H3>
<PRE>
public <B>SubsequenceTestFn</B>()</PRE>
<DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<B>Method Detail</B></FONT></TH>
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<A NAME="getMinimumNumberOfArguments()"><!-- --></A><H3>
getMinimumNumberOfArguments</H3>
<PRE>
public int <B>getMinimumNumberOfArguments</B>()</PRE>
<DL>
<DD>Get the minimum number of arguments required by the function
<p>The default implementation returns the number of items in the result of calling
<A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#getArgumentTypes()"><CODE>getArgumentTypes()</CODE></A></p>
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html#getMinimumNumberOfArguments()">getMinimumNumberOfArguments</A></CODE> in class <CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html" title="class in net.sf.saxon.lib">ExtensionFunctionDefinition</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the minimum number of arguments that must be supplied in a call to this function</DL>
</DD>
</DL>
<HR>
<A NAME="getMaximumNumberOfArguments()"><!-- --></A><H3>
getMaximumNumberOfArguments</H3>
<PRE>
public int <B>getMaximumNumberOfArguments</B>()</PRE>
<DL>
<DD>Get the maximum number of arguments allowed by the function.
<p>The default implementation returns the value of <A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#getMinimumNumberOfArguments()"><CODE>getMinimumNumberOfArguments()</CODE></A>
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html#getMaximumNumberOfArguments()">getMaximumNumberOfArguments</A></CODE> in class <CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html" title="class in net.sf.saxon.lib">ExtensionFunctionDefinition</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the maximum number of arguments that may be supplied in a call to this function</DL>
</DD>
</DL>
<HR>
<A NAME="trustResultType()"><!-- --></A><H3>
trustResultType</H3>
<PRE>
public boolean <B>trustResultType</B>()</PRE>
<DL>
<DD>Ask whether the result actually returned by the function can be trusted,
or whether it should be checked against the declared type.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html#trustResultType()">trustResultType</A></CODE> in class <CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html" title="class in net.sf.saxon.lib">ExtensionFunctionDefinition</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if the function implementation warrants that the value it returns will
be an instance of the declared result type. The default value is false, in which case
the result will be checked at run-time to ensure that it conforms to the declared type.
If the value true is returned, but the function returns a value of the wrong type, the
consequences are unpredictable.</DL>
</DD>
</DL>
<HR>
<A NAME="getArgumentTypes()"><!-- --></A><H3>
getArgumentTypes</H3>
<PRE>
public <A HREF="../../../../net/sf/saxon/value/SequenceType.html" title="class in net.sf.saxon.value">SequenceType</A>[] <B>getArgumentTypes</B>()</PRE>
<DL>
<DD>Get the required types for the arguments of this function.
<p>This method must be implemented in all subtypes.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html#getArgumentTypes()">getArgumentTypes</A></CODE> in class <CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html" title="class in net.sf.saxon.lib">ExtensionFunctionDefinition</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the required types of the arguments, as defined by the function signature. Normally
this should be an array of size <A HREF="../../../../com/saxonica/functions/extfn/SubsequenceTestFn.html#getMaximumNumberOfArguments()"><CODE>getMaximumNumberOfArguments()</CODE></A>; however for functions
that allow a variable number of arguments, the array can be smaller than this, with the last
entry in the array providing the required type for all the remaining arguments.</DL>
</DD>
</DL>
<HR>
<A NAME="getResultType(net.sf.saxon.value.SequenceType[])"><!-- --></A><H3>
getResultType</H3>
<PRE>
public <A HREF="../../../../net/sf/saxon/value/SequenceType.html" title="class in net.sf.saxon.value">SequenceType</A> <B>getResultType</B>(<A HREF="../../../../net/sf/saxon/value/SequenceType.html" title="class in net.sf.saxon.value">SequenceType</A>[] suppliedArgumentTypes)</PRE>
<DL>
<DD>Get the type of the result of the function
<p>This method must be implemented in all subtypes.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html#getResultType(net.sf.saxon.value.SequenceType[])">getResultType</A></CODE> in class <CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html" title="class in net.sf.saxon.lib">ExtensionFunctionDefinition</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>suppliedArgumentTypes</CODE> - the static types of the supplied arguments to the function.
This is provided so that a more precise result type can be returned in the common
case where the type of the result depends on the types of the arguments.
<DT><B>Returns:</B><DD>the return type of the function, as defined by its function signature</DL>
</DD>
</DL>
<HR>
<A NAME="compute(net.sf.saxon.om.SequenceIterator, net.sf.saxon.om.FunctionItem, net.sf.saxon.expr.XPathContext)"><!-- --></A><H3>
compute</H3>
<PRE>
protected abstract <A HREF="../../../../net/sf/saxon/om/SequenceIterator.html" title="interface in net.sf.saxon.om">SequenceIterator</A> <B>compute</B>(<A HREF="../../../../net/sf/saxon/om/SequenceIterator.html" title="interface in net.sf.saxon.om">SequenceIterator</A> input,
<A HREF="../../../../net/sf/saxon/om/FunctionItem.html" title="interface in net.sf.saxon.om">FunctionItem</A> test,
<A HREF="../../../../net/sf/saxon/expr/XPathContext.html" title="interface in net.sf.saxon.expr">XPathContext</A> context)
throws <A HREF="../../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE>
<DL>
<DD>The function that does the work, which must be implemented in subclasses
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>input</CODE> - the input sequence<DD><CODE>test</CODE> - the function to be applied to the items in the sequence, which takes
an item in the sequence as input and produces a boolean as its result<DD><CODE>context</CODE> - the XPath dynamic context
<DT><B>Returns:</B><DD>the result
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></CODE> - if a dynamic error occurs</DL>
</DD>
</DL>
<HR>
<A NAME="makeCallExpression()"><!-- --></A><H3>
makeCallExpression</H3>
<PRE>
public <A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionCall.html" title="class in net.sf.saxon.lib">ExtensionFunctionCall</A> <B>makeCallExpression</B>()</PRE>
<DL>
<DD>Create a call on this function. This method is called by the compiler when it identifies
a function call that calls this function.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html#makeCallExpression()">makeCallExpression</A></CODE> in class <CODE><A HREF="../../../../net/sf/saxon/lib/ExtensionFunctionDefinition.html" title="class in net.sf.saxon.lib">ExtensionFunctionDefinition</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>an expression representing a call of this extension function</DL>
</DD>
</DL>
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