tomcat-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From cos...@hyperreal.org
Subject cvs commit: jakarta-tools/ant/src/main/org/apache/tools/ant Map.java XmlHelper.java
Date Tue, 16 Nov 1999 00:40:58 GMT
costin      99/11/15 16:40:57

  Added:       ant/src/main/org/apache/tools/ant Map.java XmlHelper.java
  Log:
  More factoring/modularization.
  - moved XML reading from ProjectHelper in a separate class.
  - go directly from SAX to Java objects, no need to construct DOM rep.
  - generic code - is not Task-specific.
  ( ProjectHelper is not changed yet)
  
  Revision  Changes    Path
  1.1                  jakarta-tools/ant/src/main/org/apache/tools/ant/Map.java
  
  Index: Map.java
  ===================================================================
  package org.apache.tools.ant;
  import java.util.*;
  
  
  public interface Map {
  
      public Object get( Object key );
      
  }
  
  
  
  1.1                  jakarta-tools/ant/src/main/org/apache/tools/ant/XmlHelper.java
  
  Index: XmlHelper.java
  ===================================================================
  package org.apache.tools.ant;
  
  import java.beans.*;
  import java.io.*;
  import java.io.IOException;
  import java.lang.reflect.*;
  import java.util.*;
  import java.util.StringTokenizer;
  import org.xml.sax.InputSource;
  import org.xml.sax.SAXException;
  import org.xml.sax.*;
  import org.xml.sax.helpers.*;
  import org.w3c.dom.*;
  import org.apache.tools.ant.*;
  
  /* This file is based on ProjectHelper, with ant-specific classes replaced with generic
     objects.
     The conversion is not perfect yet - but most of the time ant works fine.
  */
  
  
  /**
   * Read an XML file and construct Java objects for each element.
   * Use only SAX - instead of SAX + DOM.
   *
   * @param mapper convert from XML tag names to Java objects
   *
   * @author costin@dnt.ro
   * @author duncan@x180.com
   */
  public class XmlHelper {
  
      public static Object readXml(File xmlFile, Properties initProps, Map mapper, Map valueMapper)
  	throws BuildException
      {
  	InputSource input;
  
  	Parser parser=null;
  	try {
  	    if(System.getProperty("org.xml.sax.parser") != null )
  		parser=ParserFactory.makeParser();
  	    else
  		parser=ParserFactory.makeParser("com.sun.xml.parser.Parser");
  
  	    input = new InputSource( new FileReader(xmlFile));
  
  	    XmlHelperHandler dh=new XmlHelperHandler(mapper, initProps);
  	    parser.setDocumentHandler( dh );
  	    parser.parse( input );
  	    return dh.getRootElement();
  	} catch( IllegalAccessException ex1 ) {
  	    ex1.printStackTrace();
  	    throw new BuildException( "Error creating sax parser" );
  	} catch(ClassNotFoundException  ex2 ) {
  	    ex2.printStackTrace();
  	    throw new BuildException( "Error creating sax parser" );
  	} catch( InstantiationException ex3)  {
  	    ex3.printStackTrace();
  	    throw new BuildException( "Error creating sax parser" );
     	} catch (IOException ioe) {
  	    String msg = "Can't open config file: " + xmlFile +
  		" due to: " + ioe;
  	    throw new BuildException(msg);
  	} catch (SAXException se) {
  	    se.printStackTrace();
  	    String msg = "Can't open config file: " + xmlFile +
  		" due to: " + se;
  	    throw new BuildException(msg);
  	}
      }
  	// "project" "org.apache.tools.ant.Project"
  	//            "default" "defaultTarget"
  	//            "basedir" "baseDirName"
  	// "property" "org.apache.tools.ant.Property" --- SPECIAL - setProperty
  	//            name, value
  	// "taskdef"  "org.apache.tools.ant.TaskDefinition" "TaskDefinition"
  	//             "name",
  	//             "class"
  	// "target"	"...Target" "target"
  	//             "name"
  	//             "depends"
  	// 	
  	// *           mapping "addTask"
  
  }
  
  
  class XmlHelperHandler implements DocumentHandler {
      Locator locator;
      Object elemStack[];
      String tagStack[];
      int sp;
      Properties props;
  
      Map tagMapper;
      
      public XmlHelperHandler(Map mapper, Properties props) {
  	tagMapper=mapper;
  	this.props=props;
      }
      
      public void setDocumentLocator (Locator locator)
      {
  	//	System.out.println("Locator " + locator);
  	this.locator = locator;
      }
  
      public void startDocument () throws SAXException
      {
          elemStack = new Object[100]; // depth of the xml doc
  	tagStack = new String[100]; 
          sp = 0;
      }
  
      public void endDocument () throws SAXException
      {
          if (sp != 0) {
  	    System.out.println("The XML document is probably broken");
  	}
      }
  
      private String processValue( String v) throws SAXException{
  	Object parent=(sp>0) ? elemStack[sp-1] : null;
  	//	System.out.println("PV " + v);
  	try {
  	    return 	ScriptHelper.replaceProperties( v, parent, elemStack[0]);
  	} catch(Exception ex ) {
  	    ex.printStackTrace();
  	}
  	return "";
      }
      
      public void startElement (String tag, AttributeList attributes)
  	throws SAXException
      {
  	try {
  	    //	System.out.println("Start " + tag + " " + attributes + " " + sp);
  
  	// Special case: property
  	if( "property".equals( tag ) ) {
  	    String n=attributes.getValue("name");
  	    String v=attributes.getValue("value");
  	    if(n==null || v==null)
  		System.out.println("Error: property with null name/value");
  	    Object elem=elemStack[sp-1];
  	    //  System.out.println("Setting " + elem.getClass()+ " "  + n + "=" + v );
  	    InvocationHelper.setProperty( elem, n, processValue(v) );
  	    return;
  	}
  	
  	Object elem=tagMapper.get( tag );
  
  	if(sp==0) {
  	    // set all "default" properties
  	    Enumeration e = props.keys();
  	    while (e.hasMoreElements()) {
  		String arg = (String)e.nextElement();
  		String value = (String)props.get(arg);
  		InvocationHelper.setProperty(elem, arg, value);
  	    }
  	    
  	}
  	
  	if( sp > 0 ) {
  	    // we're not the root
  	    InvocationHelper.setAttribute( elem, tagStack[sp-1], elemStack[sp-1] );
  	}
  	
  	if(attributes!=null) {
  	    for (int i = 0; i < attributes.getLength (); i++) {
  		String type = attributes.getType (i);
  		String name=attributes.getName(i);
  		String value=attributes.getValue(i);
  		//System.out.println("Attribute " + i + " type= " + type + " name=" + name + " value="
+ value);
  
  		InvocationHelper.setProperty( elem, name, processValue(value) );
  	    }
  	}
  
  	if( sp > 0 ) {
  	    InvocationHelper.addAttribute( elemStack[sp-1], tag, elem );
  	}
  	
  	elemStack[sp]=elem;
  	tagStack[sp]=tag;
  	sp++;
  	//	System.out.println("Start " + tag + " " + attributes + " " + sp);
  	} catch (Exception ex) {
  	    ex.printStackTrace();
  	}
      }
  
      public void endElement (String tag) throws SAXException
      {
  	if( "property".equals( tag ) ) {
  	    return;
  	}
  	if( sp > 1 ) {
  	    tagStack[sp] = null;
  	    elemStack[sp] = null;
  	}
  	sp--;
      }
  
      public void characters (char buf [], int offset, int len)
  	throws SAXException
      {
  	String value=new String(buf, offset, len );
  	//	System.out.println("XXXCH: " + value );
  	
      }
  
      public void ignorableWhitespace (char buf [], int offset, int len)
  	throws SAXException
      {
      }
      
      public void processingInstruction (String name, String instruction) 
  	throws SAXException
      {
      }
  
      public Object getRootElement() {
  	return elemStack[0];
      }
  	
  }
  
  
  
  

Mime
View raw message