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      1 /*
      2  * Licensed to the Apache Software Foundation (ASF) under one
      3  * or more contributor license agreements. See the NOTICE file
      4  * distributed with this work for additional information
      5  * regarding copyright ownership. The ASF licenses this file
      6  * to you under the Apache License, Version 2.0 (the  "License");
      7  * you may not use this file except in compliance with the License.
      8  * You may obtain a copy of the License at
      9  *
     10  *     http://www.apache.org/licenses/LICENSE-2.0
     11  *
     12  * Unless required by applicable law or agreed to in writing, software
     13  * distributed under the License is distributed on an "AS IS" BASIS,
     14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15  * See the License for the specific language governing permissions and
     16  * limitations under the License.
     17  */
     18 /*
     19  * $Id: ElemApplyImport.java 468643 2006-10-28 06:56:03Z minchau $
     20  */
     21 package org.apache.xalan.templates;
     22 
     23 import javax.xml.transform.TransformerException;
     24 
     25 import org.apache.xalan.res.XSLTErrorResources;
     26 import org.apache.xalan.transformer.TransformerImpl;
     27 import org.apache.xml.dtm.DTM;
     28 
     29 /**
     30  * Implement xsl:apply-imports.
     31  * <pre>
     32  * <!ELEMENT xsl:apply-imports EMPTY>
     33  * </pre>
     34  * @see <a href="http://www.w3.org/TR/xslt#apply-imports">apply-imports in XSLT Specification</a>
     35  * @xsl.usage advanced
     36  */
     37 public class ElemApplyImport extends ElemTemplateElement
     38 {
     39     static final long serialVersionUID = 3764728663373024038L;
     40 
     41   /**
     42    * Get an int constant identifying the type of element.
     43    * @see org.apache.xalan.templates.Constants
     44    *
     45    * @return Token ID for xsl:apply-imports element types
     46    */
     47   public int getXSLToken()
     48   {
     49     return Constants.ELEMNAME_APPLY_IMPORTS;
     50   }
     51 
     52   /**
     53    * Return the node name.
     54    *
     55    * @return Element name
     56    */
     57   public String getNodeName()
     58   {
     59     return Constants.ELEMNAME_APPLY_IMPORTS_STRING;
     60   }
     61 
     62   /**
     63    * Execute the xsl:apply-imports transformation.
     64    *
     65    * @param transformer non-null reference to the the current transform-time state.
     66    *
     67    * @throws TransformerException
     68    */
     69   public void execute(
     70           TransformerImpl transformer)
     71             throws TransformerException
     72   {
     73 
     74     if (transformer.currentTemplateRuleIsNull())
     75     {
     76       transformer.getMsgMgr().error(this,
     77         XSLTErrorResources.ER_NO_APPLY_IMPORT_IN_FOR_EACH);  //"xsl:apply-imports not allowed in a xsl:for-each");
     78     }
     79 
     80     int sourceNode = transformer.getXPathContext().getCurrentNode();
     81     if (DTM.NULL != sourceNode)
     82     {
     83       // supply the current templated (matched, not named)
     84       ElemTemplate matchTemplate = transformer.getMatchedTemplate();
     85       transformer.applyTemplateToNode(this, matchTemplate, sourceNode);
     86     }
     87     else  // if(null == sourceNode)
     88     {
     89       transformer.getMsgMgr().error(this,
     90         XSLTErrorResources.ER_NULL_SOURCENODE_APPLYIMPORTS);  //"sourceNode is null in xsl:apply-imports!");
     91     }
     92   }
     93 
     94   /**
     95    * Add a child to the child list.
     96    * <!ELEMENT xsl:apply-imports EMPTY>
     97    *
     98    * @param newChild New element to append to this element's children list
     99    *
    100    * @return null, xsl:apply-Imports cannot have children
    101    */
    102   public ElemTemplateElement appendChild(ElemTemplateElement newChild)
    103   {
    104 
    105     error(XSLTErrorResources.ER_CANNOT_ADD,
    106           new Object[]{ newChild.getNodeName(),
    107                         this.getNodeName() });  //"Can not add " +((ElemTemplateElement)newChild).m_elemName +
    108 
    109     //" to " + this.m_elemName);
    110     return null;
    111   }
    112 }
    113