diff options
Diffstat (limited to 'tutorial')
| -rw-r--r-- | tutorial/tutorial.html | 2 | ||||
| -rw-r--r-- | tutorial/tutorial2.html | 35 |
2 files changed, 25 insertions, 12 deletions
diff --git a/tutorial/tutorial.html b/tutorial/tutorial.html index 77c3dc97..c68eb814 100644 --- a/tutorial/tutorial.html +++ b/tutorial/tutorial.html @@ -690,6 +690,6 @@ binary code license.</i> <hr> Java(TM) is a trademark of Sun Microsystems, Inc.<br> -Copyright (C) 2000-2003 by Shigeru Chiba, All rights reserved. +Copyright (C) 2000-2004 by Shigeru Chiba, All rights reserved. </body> </html> diff --git a/tutorial/tutorial2.html b/tutorial/tutorial2.html index 0e7530bf..b78c1ae1 100644 --- a/tutorial/tutorial2.html +++ b/tutorial/tutorial2.html @@ -149,12 +149,20 @@ if (i < 0) { i = -i; } </pre></ul> <p>The statement and the block can refer to fields and methods. -However, they <em>cannot refer to local variables</em> declared in the -method that they are inserted into. -They can refer to the parameters -to the method although they must use different names -<code>$0</code>, <code>$1</code>, <code>$2</code>, ... described -below. Declaring a local variable in the block is allowed. +They can also refer to the parameters +to the method that they are inserted into +if that method was compiled with the -g option +(to include a local variable attribute in the class file). +Otherwise, they must access the method parameters through the special +variables <code>$0</code>, <code>$1</code>, <code>$2</code>, ... described +below. +<em>Accessing local variables declared in the method is not allowed</em> +although declaring a new local variable in the block is allowed. +However, <code>insertAt()</code> allows the statement and the block +to access local variables +if these variables are available at the specified line number +and the target method was compiled with the -g option. + <!-- <p><center><table border=8 cellspacing=0 bordercolor="#cfcfcf"> @@ -166,8 +174,8 @@ below. Declaring a local variable in the block is allowed. --> <p>The <code>String</code> object passed to the methods -<code>insertBefore()</code>, <code>insertAfter()</code>, and -<code>addCatch()</code> are compiled by +<code>insertBefore()</code>, <code>insertAfter()</code>, +<code>addCatch()</code>, and <code>insertAt()</code> are compiled by the compiler included in Javassist. Since the compiler supports language extensions, several identifiers starting with <code>$</code> @@ -239,8 +247,7 @@ the class currently edited.</td> <h4>$0, $1, $2, ...</h4> -<p>The parameters passed to the methods <code>insertBefore()</code>, -<code>insertAfter()</code>, and <code>addCatch()</code> +<p>The parameters passed to the target method are accessible with <code>$0</code>, <code>$1</code>, <code>$2</code>, ... instead of the original parameter names. @@ -685,6 +692,12 @@ object creation, or others. The second statement could be: <p>if the expression is write access. +<p>Local variables available in the target expression is +also available in the source text passed to <code>replace()</code> +if the method searched by <code>instrument()</code> was compiled +with the -g option (the class file includes a local variable +attribute). + <h4>javassist.expr.MethodCall</h4> <p>A <code>MethodCall</code> object represents a method call. @@ -1318,6 +1331,6 @@ write: <hr> Java(TM) is a trademark of Sun Microsystems, Inc.<br> -Copyright (C) 2000-2003 by Shigeru Chiba, All rights reserved. +Copyright (C) 2000-2004 by Shigeru Chiba, All rights reserved. </body> </html> |