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| <H2> | |
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| org.apache.xalan.xsltc.compiler.util</FONT> | |
| <BR> | |
| Class MethodGenerator.LocalVariableRegistry</H2> | |
| <PRE> | |
| java.lang.Object | |
| <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.xalan.xsltc.compiler.util.MethodGenerator.LocalVariableRegistry</B> | |
| </PRE> | |
| <DL> | |
| <DT><B>Enclosing class:</B><DD><A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.html" title="class in org.apache.xalan.xsltc.compiler.util">MethodGenerator</A></DD> | |
| </DL> | |
| <HR> | |
| <DL> | |
| <DT><PRE>protected class <A HREF="../../../../../../src-html/org/apache/xalan/xsltc/compiler/util/MethodGenerator.html#line.269"><B>MethodGenerator.LocalVariableRegistry</B></A><DT>extends java.lang.Object</DL> | |
| </PRE> | |
| <P> | |
| Keeps track of all local variables used in the method. | |
| <p>The | |
| <CODE>MethodGen#addLocalVariable(String,Type,InstructionHandle,InstructionHandle)</CODE></code> | |
| and | |
| <CODE>MethodGen#addLocalVariable(String,Type,int,InstructionHandle,InstructionHandle)</CODE></code> | |
| methods of <CODE>MethodGen</CODE> will only keep track of | |
| <CODE>LocalVariableGen</CODE> object until it'ss removed by a call to | |
| <CODE>MethodGen#removeLocalVariable(LocalVariableGen)</CODE>.</p> | |
| <p>In order to support efficient copying of local variables to outlined | |
| methods by | |
| <A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.html#outline(InstructionHandle, InstructionHandle, java.lang.String, org.apache.xalan.xsltc.compiler.util.ClassGenerator)"><CODE>MethodGenerator.outline(InstructionHandle,InstructionHandle,String,ClassGenerator)</CODE></A>, | |
| this class keeps track of all local variables defined by the method.</p> | |
| <P> | |
| <P> | |
| <HR> | |
| <P> | |
| <!-- =========== FIELD SUMMARY =========== --> | |
| <A NAME="field_summary"><!-- --></A> | |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | |
| <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> | |
| <B>Field Summary</B></FONT></TH> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>protected java.util.HashMap</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#_nameToLVGMap">_nameToLVGMap</A></B></CODE> | |
| <BR> | |
| Maps a name to a <CODE>LocalVariableGen</CODE></TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>protected java.util.ArrayList</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#_variables">_variables</A></B></CODE> | |
| <BR> | |
| A <code>java.lang.ArrayList</code> of all | |
| <CODE>LocalVariableGen</CODE>s created for this method, indexed by the | |
| slot number of the local variable.</TD> | |
| </TR> | |
| </TABLE> | |
| | |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> | |
| <A NAME="constructor_summary"><!-- --></A> | |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | |
| <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> | |
| <B>Constructor Summary</B></FONT></TH> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>protected </CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#MethodGenerator.LocalVariableRegistry()">MethodGenerator.LocalVariableRegistry</A></B>()</CODE> | |
| <BR> | |
| </TD> | |
| </TR> | |
| </TABLE> | |
| | |
| <!-- ========== METHOD SUMMARY =========== --> | |
| <A NAME="method_summary"><!-- --></A> | |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | |
| <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> | |
| <B>Method Summary</B></FONT></TH> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>protected LocalVariableGen[]</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#getLocals(boolean)">getLocals</A></B>(boolean includeRemoved)</CODE> | |
| <BR> | |
| Gets all <CODE>LocalVariableGen</CODE> objects for this method.</TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>protected LocalVariableGen</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#lookUpByName(java.lang.String)">lookUpByName</A></B>(java.lang.String name)</CODE> | |
| <BR> | |
| Given the name of a variable, finds a <CODE>LocalVariableGen</CODE> | |
| corresponding to it.</TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>protected LocalVariableGen</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#lookupRegisteredLocalVariable(int, int)">lookupRegisteredLocalVariable</A></B>(int slot, | |
| int offset)</CODE> | |
| <BR> | |
| Find which <CODE>LocalVariableGen</CODE>, if any, is registered for a | |
| particular JVM local stack frame slot at a particular position in the | |
| byte code for the method.</TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>protected void</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#registerByName(LocalVariableGen)">registerByName</A></B>(LocalVariableGen lvg)</CODE> | |
| <BR> | |
| Set up a mapping of the name of the specified | |
| <CODE>LocalVariableGen</CODE> object to the <code>LocalVariableGen</code> | |
| itself.</TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>protected void</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#registerLocalVariable(LocalVariableGen)">registerLocalVariable</A></B>(LocalVariableGen lvg)</CODE> | |
| <BR> | |
| Registers a <CODE>org.apache.bcel.generic.LocalVariableGen</CODE> | |
| for this method.</TD> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
| <CODE>protected void</CODE></FONT></TD> | |
| <TD><CODE><B><A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#removeByNameTracking(LocalVariableGen)">removeByNameTracking</A></B>(LocalVariableGen lvg)</CODE> | |
| <BR> | |
| Remove the mapping from the name of the specified | |
| <CODE>LocalVariableGen</CODE> to itself.</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.Object</B></TH> | |
| </TR> | |
| <TR BGCOLOR="white" CLASS="TableRowColor"> | |
| <TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD> | |
| </TR> | |
| </TABLE> | |
| | |
| <P> | |
| <!-- ============ FIELD DETAIL =========== --> | |
| <A NAME="field_detail"><!-- --></A> | |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> | |
| <B>Field Detail</B></FONT></TH> | |
| </TR> | |
| </TABLE> | |
| <A NAME="_variables"><!-- --></A><H3> | |
| _variables</H3> | |
| <PRE> | |
| protected java.util.ArrayList <A HREF="../../../../../../src-html/org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#line.284"><B>_variables</B></A></PRE> | |
| <DL> | |
| <DD><p>A <code>java.lang.ArrayList</code> of all | |
| <CODE>LocalVariableGen</CODE>s created for this method, indexed by the | |
| slot number of the local variable. The JVM stack frame of local | |
| variables is divided into "slots". A single slot can be used to | |
| store more than one variable in a method, without regard to type, so | |
| long as the byte code keeps the ranges of the two disjoint.</p> | |
| <p>If only one registration of use of a particular slot occurs, the | |
| corresponding entry of <code>_variables</code> contains the | |
| <code>LocalVariableGen</code>; if more than one occurs, the | |
| corresponding entry contains all such <code>LocalVariableGen</code>s | |
| registered for the same slot; and if none occurs, the entry will be | |
| <code>null</code>. | |
| <P> | |
| <DL> | |
| </DL> | |
| </DL> | |
| <HR> | |
| <A NAME="_nameToLVGMap"><!-- --></A><H3> | |
| _nameToLVGMap</H3> | |
| <PRE> | |
| protected java.util.HashMap <A HREF="../../../../../../src-html/org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#line.289"><B>_nameToLVGMap</B></A></PRE> | |
| <DL> | |
| <DD>Maps a name to a <CODE>LocalVariableGen</CODE> | |
| <P> | |
| <DL> | |
| </DL> | |
| </DL> | |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> | |
| <A NAME="constructor_detail"><!-- --></A> | |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> | |
| <B>Constructor Detail</B></FONT></TH> | |
| </TR> | |
| </TABLE> | |
| <A NAME="MethodGenerator.LocalVariableRegistry()"><!-- --></A><H3> | |
| MethodGenerator.LocalVariableRegistry</H3> | |
| <PRE> | |
| protected <A HREF="../../../../../../src-html/org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#line.269"><B>MethodGenerator.LocalVariableRegistry</B></A>()</PRE> | |
| <DL> | |
| </DL> | |
| <!-- ============ METHOD DETAIL ========== --> | |
| <A NAME="method_detail"><!-- --></A> | |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> | |
| <B>Method Detail</B></FONT></TH> | |
| </TR> | |
| </TABLE> | |
| <A NAME="registerLocalVariable(LocalVariableGen)"><!-- --></A><H3> | |
| registerLocalVariable</H3> | |
| <PRE> | |
| protected void <A HREF="../../../../../../src-html/org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#line.303"><B>registerLocalVariable</B></A>(LocalVariableGen lvg)</PRE> | |
| <DL> | |
| <DD>Registers a <CODE>org.apache.bcel.generic.LocalVariableGen</CODE> | |
| for this method. | |
| <p><b>Preconditions:</b> | |
| <ul> | |
| <li>The range of instructions for <code>lvg</code> does not | |
| overlap with the range of instructions for any | |
| <code>LocalVariableGen</code> with the same slot index previously | |
| registered for this method. <b><em>(Unchecked.)</em></b></li> | |
| </ul></p> | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>lvg</CODE> - The variable to be registered</DL> | |
| </DD> | |
| </DL> | |
| <HR> | |
| <A NAME="lookupRegisteredLocalVariable(int, int)"><!-- --></A><H3> | |
| lookupRegisteredLocalVariable</H3> | |
| <PRE> | |
| protected LocalVariableGen <A HREF="../../../../../../src-html/org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#line.356"><B>lookupRegisteredLocalVariable</B></A>(int slot, | |
| int offset)</PRE> | |
| <DL> | |
| <DD><p>Find which <CODE>LocalVariableGen</CODE>, if any, is registered for a | |
| particular JVM local stack frame slot at a particular position in the | |
| byte code for the method.</p> | |
| <p><b>Preconditions:</b> | |
| <ul> | |
| <li>The <CODE>InstructionList#setPositions()</CODE> has been called for | |
| the <CODE>InstructionList</CODE> associated with this | |
| <A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.html" title="class in org.apache.xalan.xsltc.compiler.util"><CODE>MethodGenerator</CODE></A>.</li> | |
| </ul></p> | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>slot</CODE> - the JVM local stack frame slot number<DD><CODE>offset</CODE> - the position in the byte code | |
| <DT><B>Returns:</B><DD>the <code>LocalVariableGen</code> for the local variable | |
| stored in the relevant slot at the relevant offset; <code>null</code> | |
| if there is none.</DL> | |
| </DD> | |
| </DL> | |
| <HR> | |
| <A NAME="registerByName(LocalVariableGen)"><!-- --></A><H3> | |
| registerByName</H3> | |
| <PRE> | |
| protected void <A HREF="../../../../../../src-html/org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#line.408"><B>registerByName</B></A>(LocalVariableGen lvg)</PRE> | |
| <DL> | |
| <DD><p>Set up a mapping of the name of the specified | |
| <CODE>LocalVariableGen</CODE> object to the <code>LocalVariableGen</code> | |
| itself.</p> | |
| <p>This is a bit of a hack. XSLTC is relying on the fact that the | |
| name that is being looked up won't be duplicated, which isn't | |
| guaranteed. It replaces code which used to call | |
| <CODE>MethodGen#getLocalVariables()</CODE> and looped through the | |
| <code>LocalVariableGen</code> objects it contained to find the one | |
| with the specified name. However, <code>getLocalVariables()</code> | |
| has the side effect of setting the start and end for any | |
| <code>LocalVariableGen</code> which did not already have them | |
| set, which causes problems for outlining..</p> | |
| <p>See also <A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#lookUpByName(java.lang.String)"><CODE>lookUpByName(String)</CODE></A> and | |
| <A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#removeByNameTracking(LocalVariableGen)"><CODE>removeByNameTracking(LocalVariableGen)</CODE></A></P | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>lvg</CODE> - a <code>LocalVariableGen</code></DL> | |
| </DD> | |
| </DL> | |
| <HR> | |
| <A NAME="removeByNameTracking(LocalVariableGen)"><!-- --></A><H3> | |
| removeByNameTracking</H3> | |
| <PRE> | |
| protected void <A HREF="../../../../../../src-html/org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#line.436"><B>removeByNameTracking</B></A>(LocalVariableGen lvg)</PRE> | |
| <DL> | |
| <DD>Remove the mapping from the name of the specified | |
| <CODE>LocalVariableGen</CODE> to itself. | |
| See also <A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#registerByName(LocalVariableGen)"><CODE>registerByName(LocalVariableGen)</CODE></A> and | |
| <A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#lookUpByName(java.lang.String)"><CODE>lookUpByName(String)</CODE></A> | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>lvg</CODE> - a <code>LocalVariableGen</code></DL> | |
| </DD> | |
| </DL> | |
| <HR> | |
| <A NAME="lookUpByName(java.lang.String)"><!-- --></A><H3> | |
| lookUpByName</H3> | |
| <PRE> | |
| protected LocalVariableGen <A HREF="../../../../../../src-html/org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#line.460"><B>lookUpByName</B></A>(java.lang.String name)</PRE> | |
| <DL> | |
| <DD><p>Given the name of a variable, finds a <CODE>LocalVariableGen</CODE> | |
| corresponding to it.</p> | |
| <p>See also <A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#registerByName(LocalVariableGen)"><CODE>registerByName(LocalVariableGen)</CODE></A> and | |
| <A HREF="../../../../../../org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#removeByNameTracking(LocalVariableGen)"><CODE>removeByNameTracking(LocalVariableGen)</CODE></A></p> | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>name</CODE> - | |
| <DT><B>Returns:</B><DD></DL> | |
| </DD> | |
| </DL> | |
| <HR> | |
| <A NAME="getLocals(boolean)"><!-- --></A><H3> | |
| getLocals</H3> | |
| <PRE> | |
| protected LocalVariableGen[] <A HREF="../../../../../../src-html/org/apache/xalan/xsltc/compiler/util/MethodGenerator.LocalVariableRegistry.html#line.494"><B>getLocals</B></A>(boolean includeRemoved)</PRE> | |
| <DL> | |
| <DD><p>Gets all <CODE>LocalVariableGen</CODE> objects for this method.</p> | |
| <p>When the <code>includeRemoved</code> argument has the value | |
| <code>false</code>, this method replaces uses of | |
| <CODE>MethodGen#getLocalVariables()</CODE> which has | |
| a side-effect of setting the start and end range for any | |
| <code>LocalVariableGen</code> if either was <code>null</code>. That | |
| side-effect causes problems for outlining of code in XSLTC. | |
| <P> | |
| <DD><DL> | |
| <DT><B>Parameters:</B><DD><CODE>includeRemoved</CODE> - Specifies whether all local variables ever | |
| declared should be returned (<code>true</code>) or only those not | |
| removed (<code>false</code>) | |
| <DT><B>Returns:</B><DD>an array of <code>LocalVariableGen</code> containing all the | |
| local variables</DL> | |
| </DD> | |
| </DL> | |
| <!-- ========= END OF CLASS DATA ========= --> | |
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