cvs commit: jakarta-tomcat-jasper/jasper34/generator/org/apache/jasper34/jsptree TagInfoImpl.java

[co...@apache.org]

costin      01/06/05 22:53:17

  Added:       jasper34/generator/org/apache/jasper34/jsptree
                        TagInfoImpl.java
  Log:
  This used to be TagCache. Now the information about the tag is stored
  in the TagInfoImpl, a lot of code will be much simpler ( and it's symetrical
  with TagLibraryInfoImpl )
  
  Revision  Changes    Path
  1.1                  jakarta-tomcat-jasper/jasper34/generator/org/apache/jasper34/jsptree/TagInfoImpl.java
  
  Index: TagInfoImpl.java
  ===================================================================
  /*
   * ====================================================================
   * 
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 1999 The Apache Software Foundation.  All rights 
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer. 
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:  
   *       "This product includes software developed by the 
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written 
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */ 
  package org.apache.jasper34.jsptree;
  
  import java.util.Hashtable;
  
  import java.lang.reflect.Method;
  
  import java.beans.BeanInfo;
  import java.beans.Introspector;
  import java.beans.PropertyDescriptor;
  import java.beans.IntrospectionException;
  
  import org.apache.jasper34.core.*;
  import org.apache.jasper34.runtime.JasperException;
  import org.apache.jasper34.parser.*;
  
  import javax.servlet.jsp.tagext.*;
  
  /**
   * Informations about a tag.
   * 
   * A simple cache to hold results of one-time evaluation for a custom 
   * tag. ( used to be called TagCache )
   *
   * @author Anil K. Vijendran (akv@eng.sun.com)
   * @author Costin Manolache
   */
  public class TagInfoImpl extends TagInfo {
      String shortTagName;
      Hashtable methodMaps;
      BeanInfo tagClassInfo;
      Class tagHandlerClass;
      
      public TagInfoImpl(String tagName,
  		       String tagClassName,
  		       String bodycontent,
  		       String infoString,
  		       TagLibraryInfo taglib,
  		       TagExtraInfo tagExtraInfo,
  		       TagAttributeInfo[] attributeInfo) {
  	super( tagName, tagClassName, bodycontent,
  	       infoString, taglib, tagExtraInfo, attributeInfo );
          this.shortTagName = tagName;
          this.methodMaps = new Hashtable();
      }
  
      private void addSetterMethod(String attrName, Method m) {
          methodMaps.put(attrName, m);
      }
      
      public Method getSetterMethod(String attrName) {
          return (Method) methodMaps.get(attrName);
      }
  
      public void setTagHandlerClass(Class tagHandlerClass) 
          throws JasperException
      {
          try {
              this.tagClassInfo = Introspector.getBeanInfo(tagHandlerClass);
              this.tagHandlerClass = tagHandlerClass;
              PropertyDescriptor[] pd = tagClassInfo.getPropertyDescriptors();
              for(int i = 0; i < pd.length; i++) {
                  /* FIXME: why is the check for null below needed?? -akv */
                  /* 
                     FIXME: should probably be checking for things like
                            pageContext, bodyContent, and parent here -akv
                  */
                  if (pd[i].getWriteMethod() != null)
                      addSetterMethod(pd[i].getName(), pd[i].getWriteMethod());
              }
          } catch (IntrospectionException ex) {
              throw new JasperException(Constants.getString("jsp.error.unable.to_introspect",
                                                            new Object[] {
                                                                tagHandlerClass.getName(),
                                                                ex.getMessage()
                                                            }
                                                            ));
          }
      }
  
      public Class getTagHandlerClass() {
          return tagHandlerClass;
      }
      
      BeanInfo getTagClassInfo() {
          return tagClassInfo;
      }
  }