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changeset 200:9fb218211763

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add Package.block(); add LuanException.getFullMessage(); git-svn-id: https://luan-java.googlecode.com/svn/trunk@201 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 03 Jul 2014 22:22:16 +0000
parents 8960c81eb4bc
children 27abb3746917
files core/src/luan/Luan.java core/src/luan/LuanException.java core/src/luan/LuanState.java core/src/luan/impl/ExpressionsExpr.java core/src/luan/impl/LuanParser.java core/src/luan/impl/LuanStateImpl.java core/src/luan/init.luan core/src/luan/modules/PackageLuan.java
diffstat 8 files changed, 56 insertions(+), 9 deletions(-) [+]
line wrap: on
line diff
--- a/core/src/luan/Luan.java	Thu Jul 03 21:37:47 2014 +0000
+++ b/core/src/luan/Luan.java	Thu Jul 03 22:22:16 2014 +0000
@@ -11,7 +11,7 @@
 			LuanFunction standalone = (LuanFunction)BasicLuan.load_file(luan,"java:luan/cmd_line.luan");
 			luan.call(standalone,args);
 		} catch(LuanException e) {
-			System.err.println(e.getMessage());
+			System.err.println(e.getFullMessage());
 //			e.printStackTrace();
 			System.exit(-1);
 		}
--- a/core/src/luan/LuanException.java	Thu Jul 03 21:37:47 2014 +0000
+++ b/core/src/luan/LuanException.java	Thu Jul 03 22:22:16 2014 +0000
@@ -1,7 +1,10 @@
 package luan;
 
+import java.io.StringWriter;
+import java.io.PrintWriter;
 
-public class LuanException extends Exception {
+
+public final class LuanException extends Exception {
 	private final String stackTrace;
 
 	LuanException(LuanBit bit,Object msg) {
@@ -13,6 +16,18 @@
 		return super.getMessage() + stackTrace;
 	}
 
+	public String getFullMessage() {
+		String msg = getMessage();
+		Throwable cause = getCause();
+		if( cause != null ) {
+			msg += "\nCaused by: ";
+			StringWriter sw = new StringWriter();
+			cause.printStackTrace(new PrintWriter(sw));
+			msg += sw;
+		}
+		return msg;
+	}
+
 	private String message() {
 		return super.getMessage();
 	}
--- a/core/src/luan/LuanState.java	Thu Jul 03 21:37:47 2014 +0000
+++ b/core/src/luan/LuanState.java	Thu Jul 03 22:22:16 2014 +0000
@@ -6,6 +6,8 @@
 import java.util.ArrayList;
 import java.util.Map;
 import java.util.LinkedHashMap;
+import java.util.Set;
+import java.util.HashSet;
 import luan.impl.LuanCompiler;
 import luan.modules.BasicLuan;
 import luan.modules.PackageLuan;
@@ -19,6 +21,7 @@
 	private LuanTable loaded;
 	private LuanTable preload;
 	private LuanTable searchers;
+	public final Set<String> blocked;
 
 	protected LuanState() {
 		global = new LuanTable();
@@ -26,6 +29,11 @@
 		loaded = new LuanTable();
 		preload = new LuanTable();
 		searchers = new LuanTable();
+		blocked = new HashSet<String>();
+	}
+
+	protected LuanState(LuanState luan) {
+		blocked = new HashSet<String>(luan.blocked);
 	}
 
 	@Override public void deepenClone(LuanState clone,DeepCloner cloner) {
--- a/core/src/luan/impl/ExpressionsExpr.java	Thu Jul 03 21:37:47 2014 +0000
+++ b/core/src/luan/impl/ExpressionsExpr.java	Thu Jul 03 22:22:16 2014 +0000
@@ -10,6 +10,8 @@
 	private final Expressions expressions;
 
 	ExpressionsExpr(Expressions expressions) {
+		if( expressions==null )
+			throw new NullPointerException();
 		this.expressions = expressions;
 	}
 
--- a/core/src/luan/impl/LuanParser.java	Thu Jul 03 21:37:47 2014 +0000
+++ b/core/src/luan/impl/LuanParser.java	Thu Jul 03 22:22:16 2014 +0000
@@ -174,6 +174,8 @@
 	}
 
 	private static Expr expr(Expressions exprs) {
+		if( exprs==null )
+			return null;
 		if( exprs instanceof Expr )
 			return (Expr)exprs; 
 		return new ExpressionsExpr(exprs);
--- a/core/src/luan/impl/LuanStateImpl.java	Thu Jul 03 21:37:47 2014 +0000
+++ b/core/src/luan/impl/LuanStateImpl.java	Thu Jul 03 22:22:16 2014 +0000
@@ -68,10 +68,14 @@
 
 	LuanStateImpl() {}
 
+	private LuanStateImpl(LuanStateImpl luan) {
+		super(luan);
+	}
+
 	@Override public LuanState shallowClone() {
 //		if( frame != null )
 //			throw new IllegalStateException("frame isn't null");
-		return new LuanStateImpl();
+		return new LuanStateImpl(this);
 	}
 
 	// returns stack
--- a/core/src/luan/init.luan	Thu Jul 03 21:37:47 2014 +0000
+++ b/core/src/luan/init.luan	Thu Jul 03 22:22:16 2014 +0000
@@ -39,6 +39,13 @@
 do_file "java:luan/version.luan"
 
 
+function Package.block(mod_name)
+	local fn,path = Package.search(mod_name)
+	if path == nil then
+		error("module '"..mod_name.."' not found")
+	end
+	Package.block_lib(path)
+end
 
 function Io.print_to(out,...)
 	local list = {}
--- a/core/src/luan/modules/PackageLuan.java	Thu Jul 03 21:37:47 2014 +0000
+++ b/core/src/luan/modules/PackageLuan.java	Thu Jul 03 22:22:16 2014 +0000
@@ -27,8 +27,9 @@
 			module.put("jpath",jpath);
 			try {
 				module.put("require",requireFn);
+				add( module, "block_lib", LuanState.class, String.class );
 				add( module, "load", LuanState.class, String.class );
-				add( module, "load_lib", String.class );
+				add( module, "load_lib", LuanState.class, String.class );
 				add( module, "search_path", String.class, String.class );
 				add( module, "search", LuanState.class, String.class );
 			} catch(NoSuchMethodException e) {
@@ -149,7 +150,7 @@
 		@Override public Object call(LuanState luan,Object[] args) throws LuanException {
 			try {
 				String objName = (String)args[1];
-				LuanFunction fn = load_lib(objName);
+				LuanFunction fn = load_lib(luan,objName);
 				return fn.call(luan,args);
 			} catch(ClassNotFoundException e) {
 				throw new RuntimeException(e);
@@ -162,7 +163,9 @@
 	};
 
 	public static final LuanFunction javaSearcher = new LuanFunction() {
-		@Override public Object[] call(LuanState luan,Object[] args) {
+		@Override public Object[] call(LuanState luan,Object[] args)
+			throws LuanException
+		{
 			String modName = (String)args[0];
 			modName = modName.replace('/','.');
 			String path = (String)luan.get("Package.jpath");
@@ -171,7 +174,7 @@
 			for( String s : path.split(";") ) {
 				String objName = s.replaceAll("\\?",modName);
 				try {
-					load_lib(objName);  // throws exception if not found
+					load_lib(luan,objName);  // throws exception if not found
 					return new Object[]{javaLoader,objName};
 				} catch(ClassNotFoundException e) {
 				} catch(NoSuchFieldException e) {
@@ -183,9 +186,15 @@
 	};
 
 
-	public static LuanFunction load_lib(String path)
-		throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException
+	public static void block_lib(LuanState luan,String path) {
+		luan.blocked.add(path);
+	}
+
+	public static LuanFunction load_lib(LuanState luan,String path)
+		throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException, LuanException
 	{
+		if( luan.blocked.contains(path) )
+			throw luan.exception(path+" is blocked");
 		int i = path.lastIndexOf('.');
 		String clsPath = path.substring(0,i);
 		String fld = path.substring(i+1);