Java Code Examples for org.springframework.expression.spel.standard.SpelExpressionParser#parseRaw()

The following examples show how to use org.springframework.expression.spel.standard.SpelExpressionParser#parseRaw() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: ScenariosForSpringSecurity.java    From spring-analysis-note with MIT License 6 votes vote down vote up
@Test
public void testScenario03_Arithmetic() throws Exception {
	SpelExpressionParser parser = new SpelExpressionParser();
	StandardEvaluationContext ctx = new StandardEvaluationContext();

	// Might be better with a as a variable although it would work as a property too...
	// Variable references using a '#'
	Expression expr = parser.parseRaw("(hasRole('SUPERVISOR') or (#a <  1.042)) and hasIpAddress('10.10.0.0/16')");

	Boolean value = null;

	ctx.setVariable("a",1.0d); // referenced as #a in the expression
	ctx.setRootObject(new Supervisor("Ben")); // so non-qualified references 'hasRole()' 'hasIpAddress()' are invoked against it
	value = expr.getValue(ctx,Boolean.class);
	assertTrue(value);

	ctx.setRootObject(new Manager("Luke"));
	ctx.setVariable("a",1.043d);
	value = expr.getValue(ctx,Boolean.class);
	assertFalse(value);
}
 
Example 2
Source File: ScenariosForSpringSecurity.java    From spring-analysis-note with MIT License 6 votes vote down vote up
@Test
	public void testScenario04_ControllingWhichMethodsRun() throws Exception {
		SpelExpressionParser parser = new SpelExpressionParser();
		StandardEvaluationContext ctx = new StandardEvaluationContext();

		ctx.setRootObject(new Supervisor("Ben")); // so non-qualified references 'hasRole()' 'hasIpAddress()' are invoked against it);

		ctx.addMethodResolver(new MyMethodResolver()); // NEEDS TO OVERRIDE THE REFLECTION ONE - SHOW REORDERING MECHANISM
		// Might be better with a as a variable although it would work as a property too...
		// Variable references using a '#'
//		SpelExpression expr = parser.parseExpression("(hasRole('SUPERVISOR') or (#a <  1.042)) and hasIpAddress('10.10.0.0/16')");
		Expression expr = parser.parseRaw("(hasRole(3) or (#a <  1.042)) and hasIpAddress('10.10.0.0/16')");

		Boolean value = null;

		ctx.setVariable("a",1.0d); // referenced as #a in the expression
		value = expr.getValue(ctx,Boolean.class);
		assertTrue(value);

//			ctx.setRootObject(new Manager("Luke"));
//			ctx.setVariable("a",1.043d);
//			value = (Boolean)expr.getValue(ctx,Boolean.class);
//			assertFalse(value);
	}
 
Example 3
Source File: ExpressionLanguageScenarioTests.java    From java-technology-stack with MIT License 6 votes vote down vote up
/**
 * Scenario: using the standard context but adding your own variables
 */
@Test
public void testScenario_DefiningVariablesThatWillBeAccessibleInExpressions() throws Exception {
	// Create a parser
	SpelExpressionParser parser = new SpelExpressionParser();
	// Use the standard evaluation context
	StandardEvaluationContext ctx = new StandardEvaluationContext();
	ctx.setVariable("favouriteColour","blue");
	List<Integer> primes = new ArrayList<>();
	primes.addAll(Arrays.asList(2,3,5,7,11,13,17));
	ctx.setVariable("primes",primes);

	Expression expr = parser.parseRaw("#favouriteColour");
	Object value = expr.getValue(ctx);
	assertEquals("blue", value);

	expr = parser.parseRaw("#primes.get(1)");
	value = expr.getValue(ctx);
	assertEquals(3, value);

	// all prime numbers > 10 from the list (using selection ?{...})
	expr = parser.parseRaw("#primes.?[#this>10]");
	value = expr.getValue(ctx);
	assertEquals("[11, 13, 17]", value.toString());
}
 
Example 4
Source File: ExpressionLanguageScenarioTests.java    From java-technology-stack with MIT License 6 votes vote down vote up
/**
 * Scenario: using your own java methods and calling them from the expression
 */
@Test
public void testScenario_RegisteringJavaMethodsAsFunctionsAndCallingThem() throws SecurityException, NoSuchMethodException {
	try {
		// Create a parser
		SpelExpressionParser parser = new SpelExpressionParser();
		// Use the standard evaluation context
		StandardEvaluationContext ctx = new StandardEvaluationContext();
		ctx.registerFunction("repeat",ExpressionLanguageScenarioTests.class.getDeclaredMethod("repeat",String.class));

		Expression expr = parser.parseRaw("#repeat('hello')");
		Object value = expr.getValue(ctx);
		assertEquals("hellohello", value);

	}
	catch (EvaluationException | ParseException ex) {
		ex.printStackTrace();
		fail("Unexpected Exception: " + ex.getMessage());
	}
}
 
Example 5
Source File: ScenariosForSpringSecurity.java    From java-technology-stack with MIT License 6 votes vote down vote up
@Test
	public void testScenario04_ControllingWhichMethodsRun() throws Exception {
		SpelExpressionParser parser = new SpelExpressionParser();
		StandardEvaluationContext ctx = new StandardEvaluationContext();

		ctx.setRootObject(new Supervisor("Ben")); // so non-qualified references 'hasRole()' 'hasIpAddress()' are invoked against it);

		ctx.addMethodResolver(new MyMethodResolver()); // NEEDS TO OVERRIDE THE REFLECTION ONE - SHOW REORDERING MECHANISM
		// Might be better with a as a variable although it would work as a property too...
		// Variable references using a '#'
//		SpelExpression expr = parser.parseExpression("(hasRole('SUPERVISOR') or (#a <  1.042)) and hasIpAddress('10.10.0.0/16')");
		Expression expr = parser.parseRaw("(hasRole(3) or (#a <  1.042)) and hasIpAddress('10.10.0.0/16')");

		Boolean value = null;

		ctx.setVariable("a",1.0d); // referenced as #a in the expression
		value = expr.getValue(ctx,Boolean.class);
		assertTrue(value);

//			ctx.setRootObject(new Manager("Luke"));
//			ctx.setVariable("a",1.043d);
//			value = (Boolean)expr.getValue(ctx,Boolean.class);
//			assertFalse(value);
	}
 
Example 6
Source File: ExpressionLanguageScenarioTests.java    From spring-analysis-note with MIT License 6 votes vote down vote up
/**
 * Scenario: using the standard context but adding your own variables
 */
@Test
public void testScenario_DefiningVariablesThatWillBeAccessibleInExpressions() throws Exception {
	// Create a parser
	SpelExpressionParser parser = new SpelExpressionParser();
	// Use the standard evaluation context
	StandardEvaluationContext ctx = new StandardEvaluationContext();
	ctx.setVariable("favouriteColour","blue");
	List<Integer> primes = new ArrayList<>();
	primes.addAll(Arrays.asList(2,3,5,7,11,13,17));
	ctx.setVariable("primes",primes);

	Expression expr = parser.parseRaw("#favouriteColour");
	Object value = expr.getValue(ctx);
	assertEquals("blue", value);

	expr = parser.parseRaw("#primes.get(1)");
	value = expr.getValue(ctx);
	assertEquals(3, value);

	// all prime numbers > 10 from the list (using selection ?{...})
	expr = parser.parseRaw("#primes.?[#this>10]");
	value = expr.getValue(ctx);
	assertEquals("[11, 13, 17]", value.toString());
}
 
Example 7
Source File: ScenariosForSpringSecurity.java    From java-technology-stack with MIT License 6 votes vote down vote up
@Test
public void testScenario03_Arithmetic() throws Exception {
	SpelExpressionParser parser = new SpelExpressionParser();
	StandardEvaluationContext ctx = new StandardEvaluationContext();

	// Might be better with a as a variable although it would work as a property too...
	// Variable references using a '#'
	Expression expr = parser.parseRaw("(hasRole('SUPERVISOR') or (#a <  1.042)) and hasIpAddress('10.10.0.0/16')");

	Boolean value = null;

	ctx.setVariable("a",1.0d); // referenced as #a in the expression
	ctx.setRootObject(new Supervisor("Ben")); // so non-qualified references 'hasRole()' 'hasIpAddress()' are invoked against it
	value = expr.getValue(ctx,Boolean.class);
	assertTrue(value);

	ctx.setRootObject(new Manager("Luke"));
	ctx.setVariable("a",1.043d);
	value = expr.getValue(ctx,Boolean.class);
	assertFalse(value);
}
 
Example 8
Source File: ExpressionLanguageScenarioTests.java    From spring-analysis-note with MIT License 6 votes vote down vote up
/**
 * Scenario: using your own java methods and calling them from the expression
 */
@Test
public void testScenario_RegisteringJavaMethodsAsFunctionsAndCallingThem() throws SecurityException, NoSuchMethodException {
	try {
		// Create a parser
		SpelExpressionParser parser = new SpelExpressionParser();
		// Use the standard evaluation context
		StandardEvaluationContext ctx = new StandardEvaluationContext();
		ctx.registerFunction("repeat",ExpressionLanguageScenarioTests.class.getDeclaredMethod("repeat",String.class));

		Expression expr = parser.parseRaw("#repeat('hello')");
		Object value = expr.getValue(ctx);
		assertEquals("hellohello", value);

	}
	catch (EvaluationException | ParseException ex) {
		ex.printStackTrace();
		fail("Unexpected Exception: " + ex.getMessage());
	}
}
 
Example 9
Source File: ExpressionLanguageScenarioTests.java    From java-technology-stack with MIT License 6 votes vote down vote up
/**
 * Scenario: using the standard infrastructure and running simple expression evaluation.
 */
@Test
public void testScenario_UsingStandardInfrastructure() {
	try {
		// Create a parser
		SpelExpressionParser parser = new SpelExpressionParser();
		// Parse an expression
		Expression expr = parser.parseRaw("new String('hello world')");
		// Evaluate it using a 'standard' context
		Object value = expr.getValue();
		// They are reusable
		value = expr.getValue();

		assertEquals("hello world", value);
		assertEquals(String.class, value.getClass());
	}
	catch (EvaluationException | ParseException ex) {
		ex.printStackTrace();
		fail("Unexpected Exception: " + ex.getMessage());
	}
}
 
Example 10
Source File: ExpressionLanguageScenarioTests.java    From java-technology-stack with MIT License 6 votes vote down vote up
@Test
public void testScenario_AddingYourOwnPropertyResolvers_2() throws Exception {
	// Create a parser
	SpelExpressionParser parser = new SpelExpressionParser();
	// Use the standard evaluation context
	StandardEvaluationContext ctx = new StandardEvaluationContext();

	ctx.addPropertyAccessor(new VegetableColourAccessor());
	Expression expr = parser.parseRaw("pea");
	Object value = expr.getValue(ctx);
	assertEquals(Color.green, value);

	try {
		expr.setValue(ctx, Color.blue);
		fail("Should not be allowed to set peas to be blue !");
	}
	catch (SpelEvaluationException ee) {
		assertEquals(SpelMessage.PROPERTY_OR_FIELD_NOT_WRITABLE_ON_NULL, ee.getMessageCode());
	}
}
 
Example 11
Source File: ScenariosForSpringSecurity.java    From java-technology-stack with MIT License 6 votes vote down vote up
@Test
public void testScenario01_Roles() throws Exception {
	try {
		SpelExpressionParser parser = new SpelExpressionParser();
		StandardEvaluationContext ctx = new StandardEvaluationContext();
		Expression expr = parser.parseRaw("hasAnyRole('MANAGER','TELLER')");

		ctx.setRootObject(new Person("Ben"));
		Boolean value = expr.getValue(ctx,Boolean.class);
		assertFalse(value);

		ctx.setRootObject(new Manager("Luke"));
		value = expr.getValue(ctx,Boolean.class);
		assertTrue(value);

	}
	catch (EvaluationException ee) {
		ee.printStackTrace();
		fail("Unexpected SpelException: " + ee.getMessage());
	}
}
 
Example 12
Source File: PropertyAccessTests.java    From spring-analysis-note with MIT License 5 votes vote down vote up
@Test
// Adding a new property accessor just for a particular type
public void testAddingSpecificPropertyAccessor() {
	SpelExpressionParser parser = new SpelExpressionParser();
	StandardEvaluationContext ctx = new StandardEvaluationContext();

	// Even though this property accessor is added after the reflection one, it specifically
	// names the String class as the type it is interested in so is chosen in preference to
	// any 'default' ones
	ctx.addPropertyAccessor(new StringyPropertyAccessor());
	Expression expr = parser.parseRaw("new String('hello').flibbles");
	Integer i = expr.getValue(ctx, Integer.class);
	assertEquals(7, (int) i);

	// The reflection one will be used for other properties...
	expr = parser.parseRaw("new String('hello').CASE_INSENSITIVE_ORDER");
	Object o = expr.getValue(ctx);
	assertNotNull(o);

	expr = parser.parseRaw("new String('hello').flibbles");
	expr.setValue(ctx, 99);
	i = expr.getValue(ctx, Integer.class);
	assertEquals(99, (int) i);

	// Cannot set it to a string value
	try {
		expr.setValue(ctx, "not allowed");
		fail("Should not have been allowed");
	}
	catch (EvaluationException ex) {
		// success - message will be: EL1063E:(pos 20): A problem occurred whilst attempting to set the property
		// 'flibbles': 'Cannot set flibbles to an object of type 'class java.lang.String''
		// System.out.println(e.getMessage());
	}
}
 
Example 13
Source File: SpelReproTests.java    From java-technology-stack with MIT License 5 votes vote down vote up
@Test
public void projectionTypeDescriptors_1() {
	StandardEvaluationContext context = new StandardEvaluationContext(new C());
	SpelExpressionParser parser = new SpelExpressionParser();
	String el1 = "ls.![#this.equals('abc')]";
	SpelExpression exp = parser.parseRaw(el1);
	List<?> value = (List<?>) exp.getValue(context);
	// value is list containing [true,false]
	assertEquals(Boolean.class, value.get(0).getClass());
	TypeDescriptor evaluated = exp.getValueTypeDescriptor(context);
	assertEquals(null, evaluated.getElementTypeDescriptor());
}
 
Example 14
Source File: ScenariosForSpringSecurity.java    From spring-analysis-note with MIT License 5 votes vote down vote up
@Test
public void testScenario02_ComparingNames() throws Exception {
	SpelExpressionParser parser = new SpelExpressionParser();
	StandardEvaluationContext ctx = new StandardEvaluationContext();

	ctx.addPropertyAccessor(new SecurityPrincipalAccessor());

	// Multiple options for supporting this expression: "p.name == principal.name"
	// (1) If the right person is the root context object then "name==principal.name" is good enough
	Expression expr = parser.parseRaw("name == principal.name");

	ctx.setRootObject(new Person("Andy"));
	Boolean value = expr.getValue(ctx,Boolean.class);
	assertTrue(value);

	ctx.setRootObject(new Person("Christian"));
	value = expr.getValue(ctx,Boolean.class);
	assertFalse(value);

	// (2) Or register an accessor that can understand 'p' and return the right person
	expr = parser.parseRaw("p.name == principal.name");

	PersonAccessor pAccessor = new PersonAccessor();
	ctx.addPropertyAccessor(pAccessor);
	ctx.setRootObject(null);

	pAccessor.setPerson(new Person("Andy"));
	value = expr.getValue(ctx,Boolean.class);
	assertTrue(value);

	pAccessor.setPerson(new Person("Christian"));
	value = expr.getValue(ctx,Boolean.class);
	assertFalse(value);
}
 
Example 15
Source File: SpelReproTests.java    From spring-analysis-note with MIT License 5 votes vote down vote up
@Test
public void projectionTypeDescriptors_1() {
	StandardEvaluationContext context = new StandardEvaluationContext(new C());
	SpelExpressionParser parser = new SpelExpressionParser();
	String el1 = "ls.![#this.equals('abc')]";
	SpelExpression exp = parser.parseRaw(el1);
	List<?> value = (List<?>) exp.getValue(context);
	// value is list containing [true,false]
	assertEquals(Boolean.class, value.get(0).getClass());
	TypeDescriptor evaluated = exp.getValueTypeDescriptor(context);
	assertEquals(null, evaluated.getElementTypeDescriptor());
}
 
Example 16
Source File: SpelReproTests.java    From spring-analysis-note with MIT License 5 votes vote down vote up
@Test
public void projectionTypeDescriptors_3() {
	StandardEvaluationContext context = new StandardEvaluationContext(new C());
	SpelExpressionParser parser = new SpelExpressionParser();
	String el1 = "ms.![key.equals('abc')]";
	SpelExpression exp = parser.parseRaw(el1);
	List<?> value = (List<?>) exp.getValue(context);
	// value is list containing [true,false]
	assertEquals(Boolean.class, value.get(0).getClass());
	TypeDescriptor evaluated = exp.getValueTypeDescriptor(context);
	assertEquals(null, evaluated.getElementTypeDescriptor());
}
 
Example 17
Source File: SpelReproTests.java    From spring-analysis-note with MIT License 5 votes vote down vote up
@Test
public void greaterThanWithNulls_SPR7840() {
	List<D> list = new ArrayList<>();
	list.add(new D("aaa"));
	list.add(new D("bbb"));
	list.add(new D(null));
	list.add(new D("ccc"));
	list.add(new D(null));
	list.add(new D("zzz"));

	StandardEvaluationContext context = new StandardEvaluationContext(list);
	SpelExpressionParser parser = new SpelExpressionParser();

	String el1 = "#root.?[a < 'hhh']";
	SpelExpression exp = parser.parseRaw(el1);
	Object value = exp.getValue(context);
	assertEquals("[D(aaa), D(bbb), D(null), D(ccc), D(null)]", value.toString());

	String el2 = "#root.?[a > 'hhh']";
	SpelExpression exp2 = parser.parseRaw(el2);
	Object value2 = exp2.getValue(context);
	assertEquals("[D(zzz)]", value2.toString());

	// trim out the nulls first
	String el3 = "#root.?[a!=null].?[a < 'hhh']";
	SpelExpression exp3 = parser.parseRaw(el3);
	Object value3 = exp3.getValue(context);
	assertEquals("[D(aaa), D(bbb), D(ccc)]", value3.toString());
}
 
Example 18
Source File: SpelReproTests.java    From java-technology-stack with MIT License 5 votes vote down vote up
@Test
public void reservedWordProperties_SPR9862() {
	StandardEvaluationContext context = new StandardEvaluationContext();
	SpelExpressionParser parser = new SpelExpressionParser();
	SpelExpression expression = parser.parseRaw("T(org.springframework.expression.spel.testresources.le.div.mod.reserved.Reserver).CONST");
	Object value = expression.getValue(context);
	assertEquals(value, Reserver.CONST);
}
 
Example 19
Source File: PropertyAccessTests.java    From java-technology-stack with MIT License 5 votes vote down vote up
@Test
// Adding a new property accessor just for a particular type
public void testAddingSpecificPropertyAccessor() {
	SpelExpressionParser parser = new SpelExpressionParser();
	StandardEvaluationContext ctx = new StandardEvaluationContext();

	// Even though this property accessor is added after the reflection one, it specifically
	// names the String class as the type it is interested in so is chosen in preference to
	// any 'default' ones
	ctx.addPropertyAccessor(new StringyPropertyAccessor());
	Expression expr = parser.parseRaw("new String('hello').flibbles");
	Integer i = expr.getValue(ctx, Integer.class);
	assertEquals(7, (int) i);

	// The reflection one will be used for other properties...
	expr = parser.parseRaw("new String('hello').CASE_INSENSITIVE_ORDER");
	Object o = expr.getValue(ctx);
	assertNotNull(o);

	expr = parser.parseRaw("new String('hello').flibbles");
	expr.setValue(ctx, 99);
	i = expr.getValue(ctx, Integer.class);
	assertEquals(99, (int) i);

	// Cannot set it to a string value
	try {
		expr.setValue(ctx, "not allowed");
		fail("Should not have been allowed");
	}
	catch (EvaluationException ex) {
		// success - message will be: EL1063E:(pos 20): A problem occurred whilst attempting to set the property
		// 'flibbles': 'Cannot set flibbles to an object of type 'class java.lang.String''
		// System.out.println(e.getMessage());
	}
}
 
Example 20
Source File: ScenariosForSpringSecurity.java    From java-technology-stack with MIT License 5 votes vote down vote up
@Test
public void testScenario02_ComparingNames() throws Exception {
	SpelExpressionParser parser = new SpelExpressionParser();
	StandardEvaluationContext ctx = new StandardEvaluationContext();

	ctx.addPropertyAccessor(new SecurityPrincipalAccessor());

	// Multiple options for supporting this expression: "p.name == principal.name"
	// (1) If the right person is the root context object then "name==principal.name" is good enough
	Expression expr = parser.parseRaw("name == principal.name");

	ctx.setRootObject(new Person("Andy"));
	Boolean value = expr.getValue(ctx,Boolean.class);
	assertTrue(value);

	ctx.setRootObject(new Person("Christian"));
	value = expr.getValue(ctx,Boolean.class);
	assertFalse(value);

	// (2) Or register an accessor that can understand 'p' and return the right person
	expr = parser.parseRaw("p.name == principal.name");

	PersonAccessor pAccessor = new PersonAccessor();
	ctx.addPropertyAccessor(pAccessor);
	ctx.setRootObject(null);

	pAccessor.setPerson(new Person("Andy"));
	value = expr.getValue(ctx,Boolean.class);
	assertTrue(value);

	pAccessor.setPerson(new Person("Christian"));
	value = expr.getValue(ctx,Boolean.class);
	assertFalse(value);
}