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Improve compatibility with lua 5.2.

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This commit is contained in:
James Roseborough
2012-09-21 05:24:58 +00:00
parent 9666f40ad7
commit be4a320bf9
7 changed files with 154 additions and 117 deletions
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5
examples/jse/SampleJseMain.java
View File

@@ -1,5 +1,6 @@
import org.luaj.vm2.Globals;
import org.luaj.vm2.LuaValue;
import org.luaj.vm2.lib.jse.JsePlatform;
@@ -10,8 +11,8 @@ public class SampleJseMain {
String script = "examples/lua/hello.lua";
// create an environment to run in
LuaValue _G = JsePlatform.standardGlobals();
_G.get("dofile").call( LuaValue.valueOf(script) );
Globals _G = JsePlatform.standardGlobals();
_G.loadFile(script).arg1().call( LuaValue.valueOf(script) );
}

44
examples/jse/ScriptEngineSample.java
View File

@@ -10,16 +10,22 @@ import javax.script.ScriptException;
import javax.script.SimpleBindings;
import org.luaj.vm2.LuaValue;
import org.luaj.vm2.lib.OneArgFunction;
public class ScriptEngineSample {
public static void main(String [] args) {
// Set the property 'luaj.debug' before getting the engine to get
// the debug libraries, which will be slower, but may provide stack traces
// when luaJC is not used.
// System.setProperty("luaj.debug", "true");
ScriptEngineManager sem = new ScriptEngineManager();
ScriptEngine e = sem.getEngineByExtension(".lua");
ScriptEngineFactory f = e.getFactory();
// uncomment to enable the lua-to-java bytecode compiler
// (require bcel library in class path)
// (requires bcel library in class path)
// org.luaj.vm2.luajc.LuaJC.install();
System.out.println( "Engine name: " +f.getEngineName() );
@@ -29,6 +35,7 @@ public class ScriptEngineSample {
String statement = f.getOutputStatement("\"hello, world\"");
System.out.println(statement);
try {
// Simple evaluations. Each tiny script is compiled then evaluated.
e.eval(statement);
e.put("x", 25);
@@ -38,22 +45,37 @@ public class ScriptEngineSample {
e.put("x", 2);
e.eval("y = math.sqrt(x)");
System.out.println( "y="+e.get("y") );
e.put("f", new OneArgFunction() {
public LuaValue call(LuaValue arg) {
System.out.println("arg "+arg.tojstring());
return LuaValue.valueOf(123);
}
});
System.out.println("eval: "+e.eval("return f('abc')"));
// Example of compiled script tha can be reused once compiled.
CompiledScript cs = ((Compilable)e).compile("y = math.sqrt(x); return y");
Bindings b = e.createBindings();
b.put("x", 3);
System.out.println( "eval: "+cs.eval(b) );
System.out.println( "y="+b.get("y") );
SimpleBindings sb = new SimpleBindings();
sb.put("x", 144);
Bindings b1 = e.createBindings();
Bindings b2 = e.createBindings();
b1.put("x", 3);
b2.put("x", 144);
System.out.println( "eval: "+cs.eval(b1) );
System.out.println( "eval: "+cs.eval(b2) );
System.out.println( "y="+b1.get("y") );
System.out.println( "y="+b2.get("y") );
// Bindings that use a client-specified Bindings type.
Bindings sb = new SimpleBindings();
sb.put("x", 2);
System.out.println( "eval: "+cs.eval(sb) );
System.out.println( "y="+sb.get("y") );
// Example of how exceptions are generated.
try {
e.eval("\n\nbogus example\n\n");
e.eval("\n\nbuggy lua code\n\n");
} catch ( ScriptException se ) {
System.out.println("script threw ScriptException as expected, message is '"+se.getMessage()+"'");
System.out.println("script exception thrown for buggy script, message: '"+se.getMessage()+"'");
}
testEngineBindings(e);