--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.xml/share/classes/com/sun/org/apache/xpath/internal/functions/FunctionOneArg.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,175 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+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 one argument.
+ * @xsl.usage advanced
+ */
+public class FunctionOneArg extends Function implements ExpressionOwner
+{
+    static final long serialVersionUID = -5180174180765609758L;
+
+  /** The first argument passed to the function (at index 0).
+   *  @serial  */
+  Expression m_arg0;
+
+  /**
+   * Return the first argument passed to the function (at index 0).
+   *
+   * @return An expression that represents the first argument passed to the
+   *         function.
+   */
+  public Expression getArg0()
+  {
+    return m_arg0;
+  }
+
+  /**
+   * 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 0.
+   */
+  public void setArg(Expression arg, int argNum)
+          throws WrongNumberArgsException
+  {
+
+    if (0 == argNum)
+    {
+      m_arg0 = 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 != 1)
+      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("one", 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 m_arg0.canTraverseOutsideSubtree();
+   }
+
+  /**
+   * 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)
+  {
+    if(null != m_arg0)
+      m_arg0.fixupVariables(vars, globalsSize);
+  }
+
+  /**
+   * @see com.sun.org.apache.xpath.internal.XPathVisitable#callVisitors(ExpressionOwner, XPathVisitor)
+   */
+  public void callArgVisitors(XPathVisitor visitor)
+  {
+        if(null != m_arg0)
+                m_arg0.callVisitors(this, visitor);
+  }
+
+
+  /**
+   * @see ExpressionOwner#getExpression()
+   */
+  public Expression getExpression()
+  {
+    return m_arg0;
+  }
+
+  /**
+   * @see ExpressionOwner#setExpression(Expression)
+   */
+  public void setExpression(Expression exp)
+  {
+        exp.exprSetParent(this);
+        m_arg0 = exp;
+  }
+
+  /**
+   * @see Expression#deepEquals(Expression)
+   */
+  public boolean deepEquals(Expression expr)
+  {
+        if(!super.deepEquals(expr))
+                return false;
+
+        if(null != m_arg0)
+        {
+                if(null == ((FunctionOneArg)expr).m_arg0)
+                        return false;
+
+                if(!m_arg0.deepEquals(((FunctionOneArg)expr).m_arg0))
+                        return false;
+        }
+        else if(null != ((FunctionOneArg)expr).m_arg0)
+                return false;
+
+        return true;
+  }
+
+
+}