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From cos...@apache.org
Subject cvs commit: jakarta-tomcat/src/share/org/apache/tomcat/util IntrospectionUtils.java
Date Sun, 04 Mar 2001 03:37:16 GMT
costin      01/03/03 19:37:16

  Modified:    src/share/org/apache/tomcat/util IntrospectionUtils.java
  Log:
  Added few more introspection tools.
  
  Revision  Changes    Path
  1.5       +106 -0    jakarta-tomcat/src/share/org/apache/tomcat/util/IntrospectionUtils.java
  
  Index: IntrospectionUtils.java
  ===================================================================
  RCS file: /home/cvs/jakarta-tomcat/src/share/org/apache/tomcat/util/IntrospectionUtils.java,v
  retrieving revision 1.4
  retrieving revision 1.5
  diff -u -r1.4 -r1.5
  --- IntrospectionUtils.java	2001/01/20 21:44:39	1.4
  +++ IntrospectionUtils.java	2001/03/04 03:37:16	1.5
  @@ -191,4 +191,110 @@
   	}
   	return null;
       }
  +
  +
  +    /** Find a method with the right name
  +	If found, call the method ( if param is int or boolean we'll convert
  +	value to the right type before) - that means you can have setDebug(1).
  +    */
  +    public static void setProperty( Object o, String name, String value )
  +    {
  +	if( dbg > 1 ) d("setProperty(" +
  +			o.getClass() + " " +  name + "="  +
  +			value  +")" );
  +
  +	String setter= "set" +capitalize(name);
  +
  +	try {
  +	    Method methods[]=o.getClass().getMethods();
  +	    Method setPropertyMethod=null;
  +
  +	    // First, the ideal case - a setFoo( String ) method
  +	    for( int i=0; i< methods.length; i++ ) {
  +		Class paramT[]=methods[i].getParameterTypes();
  +		if( setter.equals( methods[i].getName() ) &&
  +		    paramT.length == 1 &&
  +		    "java.lang.String".equals( paramT[0].getName())) {
  +		    
  +		    methods[i].invoke( o, new Object[] { value } );
  +		    return;
  +		}
  +	    }
  +	    
  +	    // Try a setFoo ( int ) or ( boolean )
  +	    for( int i=0; i< methods.length; i++ ) {
  +		boolean ok=true;
  +		if( setter.equals( methods[i].getName() ) &&
  +		    methods[i].getParameterTypes().length == 1) {
  +
  +		    // match - find the type and invoke it
  +		    Class paramType=methods[i].getParameterTypes()[0];
  +		    Object params[]=new Object[1];
  +		    if ("java.lang.Integer".equals( paramType.getName()) ||
  +			"int".equals( paramType.getName())) {
  +			try {
  +			    params[0]=new Integer(value);
  +			} catch( NumberFormatException ex ) {ok=false;}
  +		    } else if ("java.lang.Boolean".
  +			       equals( paramType.getName()) ||
  +			"boolean".equals( paramType.getName())) {
  +			params[0]=new Boolean(value);
  +		    } else {
  +			d("Unknown type " + paramType.getName() );
  +		    }
  +
  +		    if( ok ) {
  +			methods[i].invoke( o, params );
  +			return;
  +		    }
  +		}
  +
  +		// save "setProperty" for later
  +		if( "setProperty".equals( methods[i].getName())) {
  +		    setPropertyMethod=methods[i];
  +		}
  +	    }
  +
  +	    // Ok, no setXXX found, try a setProperty("name", "value")
  +	    if( setPropertyMethod != null ) {
  +		Object params[]=new Object[2];
  +		params[0]=name;
  +		params[1]=value;
  +		setPropertyMethod.invoke( o, params );
  +	    }
  +
  +	} catch( SecurityException ex1 ) {
  +	    if( dbg > 0 )
  +		d("SecurityException for " + o.getClass() + " " +
  +			name + "="  + value  +")" );
  +	    if( dbg > 1 ) ex1.printStackTrace();
  +	} catch (IllegalAccessException iae) {
  +	    if( dbg > 0 )
  +		d("IllegalAccessException for " +
  +			o.getClass() + " " +  name + "="  + value  +")" );
  +	    if( dbg > 1 ) iae.printStackTrace();
  +	} catch (InvocationTargetException ie) {
  +	    if( dbg > 0 )
  +		d("InvocationTargetException for " + o.getClass() +
  +			" " +  name + "="  + value  +")" );
  +	    if( dbg > 1 ) ie.printStackTrace();
  +	}
  +    }
  +
  +    /** Reverse of Introspector.decapitalize
  +     */
  +    public static String capitalize(String name) {
  +	if (name == null || name.length() == 0) {
  +	    return name;
  +	}
  +	char chars[] = name.toCharArray();
  +	chars[0] = Character.toUpperCase(chars[0]);
  +	return new String(chars);
  +    }
  +
  +    // debug --------------------
  +    static final int dbg=0;
  +    static void d(String s ) {
  +	System.out.println("IntrospectionUtils: " + s );
  +    }
   }
  
  
  

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