--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxp/src/share/classes/com/sun/org/apache/xpath/internal/functions/Function2Args.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,186 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+/*
+ * Copyright 1999-2004 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * $Id: Function2Args.java,v 1.2.4.1 2005/09/14 20:18:46 jeffsuttor Exp $
+ */
+package com.sun.org.apache.xpath.internal.functions;
+
+import com.sun.org.apache.xalan.internal.res.XSLMessages;
+import com.sun.org.apache.xpath.internal.Expression;
+import com.sun.org.apache.xpath.internal.ExpressionOwner;
+import com.sun.org.apache.xpath.internal.XPathVisitor;
+
+/**
+ * Base class for functions that accept two arguments.
+ * @xsl.usage advanced
+ */
+public class Function2Args extends FunctionOneArg
+{
+    static final long serialVersionUID = 5574294996842710641L;
+
+  /** The second argument passed to the function (at index 1).
+   *  @serial  */
+  Expression m_arg1;
+
+  /**
+   * Return the second argument passed to the function (at index 1).
+   *
+   * @return An expression that represents the second argument passed to the
+   *         function.
+   */
+  public Expression getArg1()
+  {
+    return m_arg1;
+  }
+
+  /**
+   * This function is used to fixup variables from QNames to stack frame
+   * indexes at stylesheet build time.
+   * @param vars List of QNames that correspond to variables.  This list
+   * should be searched backwards for the first qualified name that
+   * corresponds to the variable reference qname.  The position of the
+   * QName in the vector from the start of the vector will be its position
+   * in the stack frame (but variables above the globalsTop value will need
+   * to be offset to the current stack frame).
+   */
+  public void fixupVariables(java.util.Vector vars, int globalsSize)
+  {
+    super.fixupVariables(vars, globalsSize);
+    if(null != m_arg1)
+      m_arg1.fixupVariables(vars, globalsSize);
+  }
+
+
+  /**
+   * Set an argument expression for a function.  This method is called by the
+   * XPath compiler.
+   *
+   * @param arg non-null expression that represents the argument.
+   * @param argNum The argument number index.
+   *
+   * @throws WrongNumberArgsException If the argNum parameter is greater than 1.
+   */
+  public void setArg(Expression arg, int argNum)
+          throws WrongNumberArgsException
+  {
+
+    // System.out.println("argNum: "+argNum);
+    if (argNum == 0)
+      super.setArg(arg, argNum);
+    else if (1 == argNum)
+    {
+      m_arg1 = arg;
+      arg.exprSetParent(this);
+    }
+    else
+                  reportWrongNumberArgs();
+  }
+
+  /**
+   * Check that the number of arguments passed to this function is correct.
+   *
+   *
+   * @param argNum The number of arguments that is being passed to the function.
+   *
+   * @throws WrongNumberArgsException
+   */
+  public void checkNumberArgs(int argNum) throws WrongNumberArgsException
+  {
+    if (argNum != 2)
+      reportWrongNumberArgs();
+  }
+
+  /**
+   * Constructs and throws a WrongNumberArgException with the appropriate
+   * message for this function object.
+   *
+   * @throws WrongNumberArgsException
+   */
+  protected void reportWrongNumberArgs() throws WrongNumberArgsException {
+      throw new WrongNumberArgsException(XSLMessages.createXPATHMessage("two", null));
+  }
+
+  /**
+   * Tell if this expression or it's subexpressions can traverse outside
+   * the current subtree.
+   *
+   * @return true if traversal outside the context node's subtree can occur.
+   */
+   public boolean canTraverseOutsideSubtree()
+   {
+    return super.canTraverseOutsideSubtree()
+    ? true : m_arg1.canTraverseOutsideSubtree();
+   }
+
+  class Arg1Owner implements ExpressionOwner
+  {
+    /**
+     * @see ExpressionOwner#getExpression()
+     */
+    public Expression getExpression()
+    {
+      return m_arg1;
+    }
+
+
+    /**
+     * @see ExpressionOwner#setExpression(Expression)
+     */
+    public void setExpression(Expression exp)
+    {
+        exp.exprSetParent(Function2Args.this);
+        m_arg1 = exp;
+    }
+  }
+
+
+  /**
+   * @see com.sun.org.apache.xpath.internal.XPathVisitable#callVisitors(ExpressionOwner, XPathVisitor)
+   */
+  public void callArgVisitors(XPathVisitor visitor)
+  {
+        super.callArgVisitors(visitor);
+        if(null != m_arg1)
+                m_arg1.callVisitors(new Arg1Owner(), visitor);
+  }
+
+  /**
+   * @see Expression#deepEquals(Expression)
+   */
+  public boolean deepEquals(Expression expr)
+  {
+        if(!super.deepEquals(expr))
+                return false;
+
+        if(null != m_arg1)
+        {
+                if(null == ((Function2Args)expr).m_arg1)
+                        return false;
+
+                if(!m_arg1.deepEquals(((Function2Args)expr).m_arg1))
+                        return false;
+        }
+        else if(null != ((Function2Args)expr).m_arg1)
+                return false;
+
+        return true;
+  }
+
+}