MVEL Expression Samples

gistfile1.java

	    Map vars = new HashMap();
		
		vars.put("foobar", new Integer(120));
		
		Boolean result = (Boolean) MVEL.eval("foobar > 99", vars);
		
		if (result.booleanValue()) {
			System.out.println("Hurrah");
		}
			
		
		result = (Boolean) MVEL.eval("foobar > 99 && foobar < 110", vars);
		
		if (result.booleanValue()) {
			System.out.println("Hurrah AND Operator");
		}
		
		vars.put("foobar", new Integer(70));
		
		result = (Boolean) MVEL.eval("foobar < 0.8 * 100 ", vars);
		
		if (result.booleanValue()) {
			System.out.println("Hurrah less than 80% threshold");
		}
		
		vars.put("foobar", new Integer(70));
		
		result = (Boolean) MVEL.eval("foobar == 100 ", vars);
		
		if (result.booleanValue()) {
			System.out.println("Hurrah less than 80% threshold");
		}
		
		/* Multi Variable */
		
		vars.put("foobar", new Integer(120));
		vars.put("rhs1", new Integer(99));
		
		
		result = (Boolean) MVEL.eval("foobar > rhs1", vars);
		
		if (result.booleanValue()) {
			System.out.println("Hurrah");
		}
			
		vars.put("rhs2", new Integer(110));
		result = (Boolean) MVEL.eval("foobar > rhs1 && foobar < rhs2", vars);
		
		if (result.booleanValue()) {
			System.out.println("Hurrah AND Operator");
		}
		
		vars.put("foobar", new Integer(70));
		vars.put("rhs1", new Float(0.8));
		vars.put("rhs2", new Integer(100));
		
		result = (Boolean) MVEL.eval("foobar < rhs1 * rhs2 ", vars);
		
		if (result.booleanValue()) {
			System.out.println("Hurrah less than 80% threshold");
		}
		
		vars.put("foobar", new Integer(70));
		vars.put("rhs1", new Integer(100));
		
		result = (Boolean) MVEL.eval("foobar == rhs1 ", vars);
		
		if (result.booleanValue()) {
			System.out.println("Hurrah they are equal");
		}
		
		
		
		ParserContext pctx = new ParserContext();
		pctx.stronglyTyped();
		pctx.withInput("contentinstance", ContentInstance.class);
		
		MVEL.compileExpression("content = contentinstance.content", pctx);
		MVEL.compileExpression("contentInstanceId = contentinstance.contentInstanceId", pctx);
		MVEL.compileExpression("creationTime = contentinstance.creationTime", pctx);
		
		Map<String, Class> inputs = pctx.getVariables();