| /* |
| * 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. |
| */ |
| /* |
| * $Id: AVTPart.java 468643 2006-10-28 06:56:03Z minchau $ |
| */ |
| package org.apache.xalan.templates; |
| |
| import org.apache.xml.utils.FastStringBuffer; |
| import org.apache.xpath.XPathContext; |
| |
| /** |
| * Class to hold a part, either a string or XPath, |
| * of an Attribute Value Template. |
| * @xsl.usage internal |
| */ |
| public abstract class AVTPart implements java.io.Serializable, XSLTVisitable |
| { |
| static final long serialVersionUID = -1747749903613916025L; |
| |
| /** |
| * Construct a part. |
| */ |
| public AVTPart(){} |
| |
| /** |
| * Get the AVT part as the original string. |
| * |
| * @return the AVT part as the original string. |
| */ |
| public abstract String getSimpleString(); |
| |
| /** |
| * Write the evaluated value into the given |
| * string buffer. |
| * |
| * @param xctxt The XPath context to use to evaluate this AVT. |
| * @param buf Buffer to write into. |
| * @param context The current source tree context. |
| * @param nsNode The current namespace context (stylesheet tree context). |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public abstract void evaluate( |
| XPathContext xctxt, FastStringBuffer buf, int context, |
| org.apache.xml.utils.PrefixResolver nsNode) |
| throws javax.xml.transform.TransformerException; |
| |
| /** |
| * Set the XPath support. |
| * |
| * @param support XPathContext to set. |
| */ |
| public void setXPathSupport(XPathContext support){} |
| |
| /** |
| * 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 false; |
| } |
| |
| /** |
| * 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 abstract void fixupVariables(java.util.Vector vars, int globalsSize); |
| |
| |
| } |