Examples with ParserContext org.mvel2.ParserContext used on opensource projects

Example 41 with ParserContext

use of org.mvel2.ParserContext in project mvel by mvel.

the class CoreConfidenceTests method testNestedEnumFromJar.

public void testNestedEnumFromJar() throws ClassNotFoundException, SecurityException, NoSuchFieldException {
    String expr = "EventRequest.Status.ACTIVE";
    // creating a classloader for the jar
    URL resource = getClass().getResource("/eventing-example.jar");
    assertNotNull(resource);
    URLClassLoader loader = new URLClassLoader(new URL[] { resource }, getClass().getClassLoader());
    // loading the class to prove it works
    Class<?> er = loader.loadClass("org.drools.examples.eventing.EventRequest");
    assertNotNull(er);
    assertEquals("org.drools.examples.eventing.EventRequest", er.getCanonicalName());
    // getting the value of the enum to prove it works:
    Class<?> st = er.getDeclaredClasses()[0];
    assertNotNull(st);
    Field active = st.getField("ACTIVE");
    assertNotNull(active);
    // now, trying with MVEL
    ParserConfiguration pconf = new ParserConfiguration();
    pconf.setClassLoader(loader);
    pconf.addImport(er);
    ParserContext pctx = new ParserContext(pconf);
    pctx.setStrongTyping(true);
    Serializable compiled = MVEL.compileExpression(expr, pctx);
    Object result = MVEL.executeExpression(compiled);
    assertNotNull(result);
}

Example 42 with ParserContext

use of org.mvel2.ParserContext in project mvel by mvel.

the class CoreConfidenceTests method testCompileParserContextShouldNotLoopIndefinitelyOnValidJavaExpression.

/**
 * Provided by: Phillipe Ombredanne
 */
public void testCompileParserContextShouldNotLoopIndefinitelyOnValidJavaExpression() {
    String expr = // 
    "		System.out.println( message );\n" + // 
    "m.setMessage( \"Goodbye cruel world\" );\n" + // 
    "System.out.println(m.getStatus());\n" + "m.setStatus( Message.GOODBYE );\n";
    ParserContext context = new ParserContext();
    context.setStrictTypeEnforcement(false);
    context.addImport("Message", Message.class);
    context.addInput("System", void.class);
    context.addInput("message", Object.class);
    context.addInput("m", Object.class);
    ExpressionCompiler compiler = new ExpressionCompiler(expr, context);
    compiler.compile();
}

Example 43 with ParserContext

use of org.mvel2.ParserContext in project mvel by mvel.

the class CoreConfidenceTests method testMapsAndLists.

public void testMapsAndLists() {
    OptimizerFactory.setDefaultOptimizer("ASM");
    ParserContext ctx = new ParserContext();
    ctx.setStrongTyping(true);
    ctx.addImport(HashMap.class);
    ctx.addImport(ArrayList.class);
    ctx.addInput("list", List.class);
    String expression = "m = new HashMap();\n" + "l = new ArrayList();\n" + "l.add(\"first\");\n" + "m.put(\"content\", l);\n" + "list.add(((ArrayList)m[\"content\"])[0]);";
    Serializable s = compileExpression(expression, ctx);
    Map vars = new HashMap();
    List list = new ArrayList();
    vars.put("list", list);
    Boolean result = (Boolean) executeExpression(s, vars);
    assertNotNull(result);
    assertTrue(result);
    assertEquals(1, list.size());
    assertEquals("first", list.get(0));
}

Example 44 with ParserContext

use of org.mvel2.ParserContext in project mvel by mvel.

the class CoreConfidenceTests method testWhileUsingImports.

public void testWhileUsingImports() {
    Map<String, Object> imports = new HashMap<String, Object>();
    imports.put("ArrayList", java.util.ArrayList.class);
    imports.put("List", java.util.List.class);
    ParserContext context = new ParserContext(imports, null, "testfile");
    ExpressionCompiler compiler = new ExpressionCompiler("List list = new ArrayList(); return (list == empty)", context);
    assertTrue((Boolean) executeExpression(compiler.compile(), new DefaultLocalVariableResolverFactory()));
}

Example 45 with ParserContext

use of org.mvel2.ParserContext in project mvel by mvel.

the class CoreConfidenceTests method testDeepMethodNameResolution.

public void testDeepMethodNameResolution() {
    String expression = "variables = [ \"symbol\" : \"RHT\" ]; \n" + "drools.getProcessManager().startProcess(\"id\", variables );";
    // third pass
    ParserContext ctx = new ParserContext();
    ctx.setStrongTyping(true);
    ctx.addInput("drools", KnowledgeRuntimeHelper.class);
    Map vars = new HashMap();
    vars.put("drools", new KnowledgeRuntimeHelper());
    Serializable expr = MVEL.compileExpression(expression, ctx);
    executeExpression(expr, vars);
}