Examples of javax.script.Bindings

javax.script.Bindings
Modifies the script's global variables.

        for (int i = 0; i < runs; i++) {
            new Thread() {
                public void run() {
                    String name = names.get(random.nextInt(names.size() - 1));
                    try {
                        final Bindings bindings = engine.createBindings();
                        bindings.put("g", g);
                        bindings.put("name", name);
                        Object result = script.eval(bindings);
                        if (name.equals("stephen") || name.equals("pavel") || name.equals("matthias"))
                            assertNull(result);
                        else
                            assertNotNull(result);

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    @Test
    @LoadGraphWith(LoadGraphWith.GraphData.CLASSIC)
    public void shouldEvalGlobalClosuresEvenAfterEvictionOfClass() throws ScriptException {
        final GremlinGroovyScriptEngine engine = new GremlinGroovyScriptEngine();


        final Bindings bindings = engine.createBindings();
        bindings.put("g", g);


        // strong referenced global closure
        engine.eval("def isVadas(v){v.value('name')=='vadas'}", bindings);
        assertEquals(true, engine.eval("isVadas(g.v(2))", bindings));


        // phantom referenced global closure
        bindings.put(GremlinGroovyScriptEngine.KEY_REFERENCE_TYPE, GremlinGroovyScriptEngine.REFERENCE_TYPE_PHANTOM);
        engine.eval("def isMarko(v){v.value('name')=='marko'}", bindings);


        try {
            engine.eval("isMarko(g.v(1))", bindings);
            fail("the isMarko function should not be present");
        } catch (Exception ex) {


        }


        assertEquals(true, engine.eval("def isMarko(v){v.value('name')=='marko'}; isMarko(g.v(1))", bindings));


        try {
            engine.eval("isMarko(g.v(1))", bindings);
            fail("the isMarko function should not be present");
        } catch (Exception ex) {


        }


        bindings.remove(GremlinGroovyScriptEngine.KEY_REFERENCE_TYPE);


        // isVadas class was a hard reference so it should still be hanging about
        assertEquals(true, engine.eval("isVadas(g.v(2))", bindings));
    }

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    @Test
    @LoadGraphWith(LoadGraphWith.GraphData.CLASSIC)
    public void shouldAllowFunctionsUsedInClosure() throws ScriptException {
        final GremlinGroovyScriptEngine engine = new GremlinGroovyScriptEngine();


        final Bindings bindings = engine.createBindings();
        bindings.put("g", g);
        bindings.put("#jsr223.groovy.engine.keep.globals", "phantom");


        // this works on its own when the function and the line that uses it is in one "script".  this is the
        // current workaround
        assertEquals(g.v(2), engine.eval("def isVadas(v){v.value('name')=='vadas'};g.V().filter{isVadas(it.get())}.next()", bindings));


        // let's reset this piece and make sure isVadas is not hanging around.
        engine.reset();


        // validate that isVadas throws an exception since it is not defined
        try {
            engine.eval("isVadas(g.v(2))", bindings);


            // fail the test if the above doesn't throw an exception
            fail();
        } catch (Exception ex) {
            // this is good...we want this. it means isVadas isn't hanging about
        }


        // now...define the function separately on its own in one script
        bindings.remove("#jsr223.groovy.engine.keep.globals");
        engine.eval("def isVadas(v){v.value('name')=='vadas'}", bindings);


        // make sure the function works on its own...no problem
        assertEquals(true, engine.eval("isVadas(g.v(2))", bindings));

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    @org.junit.Ignore
    @LoadGraphWith(LoadGraphWith.GraphData.CLASSIC)
    public void shouldAllowUseOfClasses() throws ScriptException {
        GremlinGroovyScriptEngine engine = new GremlinGroovyScriptEngine();


        final Bindings bindings = engine.createBindings();
        bindings.put("g", g);


        // works when it's all defined together
        assertEquals(true, engine.eval("class c { static def isVadas(v){v.value('name')=='vadas'}};c.isVadas(g.v(2))", bindings));


        // let's reset this piece and make sure isVadas is not hanging around.

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    @Test
    public void shouldClearEngineScopeOnReset() throws Exception {
        final GremlinGroovyScriptEngine engine = new GremlinGroovyScriptEngine();
        engine.eval("x = { y -> y + 1}");
        Bindings b = engine.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
        assertTrue(b.containsKey("x"));
        assertEquals(2, ((Closure) b.get("x")).call(1));


        // should clear the bindings
        engine.reset();
        try {
            engine.eval("x(1)");
            fail("Bindings should have been cleared.");
        } catch (Exception ex) {


        }


        b = engine.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
        assertFalse(b.containsKey("x"));


        // redefine x
        engine.eval("x = { y -> y + 2}");
        assertEquals(3, engine.eval("x(1)"));
        b = engine.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
        assertTrue(b.containsKey("x"));
        assertEquals(3, ((Closure) b.get("x")).call(1));
    }

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        this.script = script;
    }


    public Object apply(final Object a) {
        try {
            final Bindings bindings = new SimpleBindings();
            bindings.put(A, a);
            return this.engine.eval(this.script, bindings);
        } catch (final ScriptException e) {
            throw new IllegalArgumentException(e.getMessage());
        }
    }

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        }
    }


    public void accept(final Object a) {
        try {
            final Bindings bindings = new SimpleBindings();
            bindings.put(A, a);
            this.engine.eval(this.script, bindings);
        } catch (final ScriptException e) {
            throw new IllegalArgumentException(e.getMessage());
        }
    }

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        }
    }


    public void accept(final Object a, final Object b) {
        try {
            final Bindings bindings = new SimpleBindings();
            bindings.put(A, a);
            bindings.put(B, b);
            this.engine.eval(this.script, bindings);
        } catch (final ScriptException e) {
            throw new IllegalArgumentException(e.getMessage());
        }
    }

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        }
    }


    public void accept(final Object a, final Object b, final Object c) {
        try {
            final Bindings bindings = new SimpleBindings();
            bindings.put(A, a);
            bindings.put(B, b);
            bindings.put(C, c);
            this.engine.eval(this.script, bindings);
        } catch (final ScriptException e) {
            throw new IllegalArgumentException(e.getMessage());
        }
    }

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        }
    }


    public boolean test(final Object a) {
        try {
            final Bindings bindings = new SimpleBindings();
            bindings.put(A, a);
            return (boolean) this.engine.eval(this.script, bindings);
        } catch (final ScriptException e) {
            throw new IllegalArgumentException(e.getMessage());
        }
    }

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