org.springframework.expression.Expression.getValueTypeDescriptor java code examples

Common ways to obtain Expression

private void myMethod () {
 Expression e =SpelExpressionParser parser;String str;parser.parseExpression(str, ParserContext.TEMPLATE_EXPRESSION)
ExpressionParser parser;String expressionString;parser.parseExpression(expressionString)
SpelExpressionParser parser;String expressionString;parser.parseExpression(expressionString)
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}

@SuppressWarnings("unchecked")
@Test
public void resolveMapKeyValueTypes() {
  mapNotGeneric = new HashMap();
  mapNotGeneric.put("baseAmount", 3.11);
  mapNotGeneric.put("bonusAmount", 7.17);
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("mapNotGeneric");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.util.HashMap<?, ?>", expression.getValueTypeDescriptor(this).toString());
}

@SuppressWarnings("unchecked")
@Test
public void resolveCollectionElementType() {
  listNotGeneric = new ArrayList(2);
  listNotGeneric.add(5);
  listNotGeneric.add(6);
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("listNotGeneric");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.util.ArrayList<?>", expression.getValueTypeDescriptor(this).toString());
  assertEquals("5,6", expression.getValue(this, String.class));
}

@Test
public void indexIntoPropertyContainingListOfList() {
  List<List<Integer>> property = new ArrayList<>();
  property.add(Arrays.asList(3));
  this.parameterizedListOfList = property;
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("parameterizedListOfList[0]");
  assertEquals("java.util.Arrays$ArrayList<java.lang.Integer>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property.get(0), expression.getValue(this));
  expression = parser.parseExpression("parameterizedListOfList[0][0]");
  assertEquals(3, expression.getValue(this));
}

@Test
public void indexIntoPropertyContainingList() {
  List<Integer> property = new ArrayList<>();
  property.add(3);
  this.parameterizedList = property;
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("parameterizedList");
  assertEquals("java.util.ArrayList<java.lang.Integer>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("parameterizedList[0]");
  assertEquals(3, expression.getValue(this));
}

@Test
public void indexIntoGenericPropertyContainingList() {
  List<String> property = new ArrayList<>();
  property.add("bar");
  this.property = property;
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("property");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.util.ArrayList<?>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("property[0]");
  assertEquals("bar", expression.getValue(this));
}

@Test
public void indexIntoGenericPropertyContainingMap() {
  Map<String, String> property = new HashMap<>();
  property.put("foo", "bar");
  this.property = property;
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("property");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.util.HashMap<?, ?>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  assertEquals(property, expression.getValue(this, Map.class));
  expression = parser.parseExpression("property['foo']");
  assertEquals("bar", expression.getValue(this));
}

@Test
public void emptyList() {
  listOfScalarNotGeneric = new ArrayList();
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("listOfScalarNotGeneric");
  assertEquals("java.util.ArrayList<?>", expression.getValueTypeDescriptor(this).toString());
  assertEquals("", expression.getValue(this, String.class));
}

@Test
public void setPropertyContainingMap() {
  Map<Integer, Integer> property = new HashMap<>();
  property.put(9, 3);
  this.parameterizedMap = property;
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("parameterizedMap");
  assertEquals("java.util.HashMap<java.lang.Integer, java.lang.Integer>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("parameterizedMap['9']");
  assertEquals(3, expression.getValue(this));
  expression.setValue(this, "37");
  assertEquals(37, expression.getValue(this));
}

@Test
public void setPropertyContainingList() {
  List<Integer> property = new ArrayList<>();
  property.add(3);
  this.parameterizedList = property;
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("parameterizedList");
  assertEquals("java.util.ArrayList<java.lang.Integer>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("parameterizedList[0]");
  assertEquals(3, expression.getValue(this));
  expression.setValue(this, "4");
  assertEquals(4, expression.getValue(this));
}

@Test
public void setGenericPropertyContainingList() {
  List<Integer> property = new ArrayList<>();
  property.add(3);
  this.property = property;
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("property");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.util.ArrayList<?>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("property[0]");
  assertEquals(3, expression.getValue(this));
  expression.setValue(this, "4");
  assertEquals("4", expression.getValue(this));
}

@Test
public void setGenericPropertyContainingMap() {
  Map<String, String> property = new HashMap<>();
  property.put("foo", "bar");
  this.property = property;
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("property");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.util.HashMap<?, ?>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("property['foo']");
  assertEquals("bar", expression.getValue(this));
  expression.setValue(this, "baz");
  assertEquals("baz", expression.getValue(this));
}

@Test
public void indexIntoGenericPropertyContainingMapObject() {
  Map<String, Map<String, String>> property = new HashMap<>();
  Map<String, String> map = new HashMap<>();
  map.put("foo", "bar");
  property.put("property", map);
  SpelExpressionParser parser = new SpelExpressionParser();
  StandardEvaluationContext context = new StandardEvaluationContext();
  context.addPropertyAccessor(new MapAccessor());
  context.setRootObject(property);
  Expression expression = parser.parseExpression("property");
  assertEquals("java.util.HashMap<?, ?>", expression.getValueTypeDescriptor(context).toString());
  assertEquals(map, expression.getValue(context));
  assertEquals(map, expression.getValue(context, Map.class));
  expression = parser.parseExpression("property['foo']");
  assertEquals("bar", expression.getValue(context));
}

@Test
public void indexIntoGenericPropertyContainingArray() {
  String[] property = new String[] { "bar" };
  this.property = property;
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("property");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.lang.String[]", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("property[0]");
  assertEquals("bar", expression.getValue(this));
}

@Test
public void resolveCollectionElementTypeNull() {
  SpelExpressionParser parser = new SpelExpressionParser();
  Expression expression = parser.parseExpression("listNotGeneric");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.util.List<?>", expression.getValueTypeDescriptor(this).toString());
}

@Test
public void setPropertyContainingMapAutoGrow() {
  SpelExpressionParser parser = new SpelExpressionParser(new SpelParserConfiguration(true, false));
  Expression expression = parser.parseExpression("parameterizedMap");
  assertEquals("java.util.Map<java.lang.Integer, java.lang.Integer>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("parameterizedMap['9']");
  assertEquals(null, expression.getValue(this));
  expression.setValue(this, "37");
  assertEquals(37, expression.getValue(this));
}

@Test
public void indexIntoGenericPropertyContainingGrowingList() {
  List<String> property = new ArrayList<>();
  this.property = property;
  SpelParserConfiguration configuration = new SpelParserConfiguration(true, true);
  SpelExpressionParser parser = new SpelExpressionParser(configuration);
  Expression expression = parser.parseExpression("property");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.util.ArrayList<?>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("property[0]");
  try {
    assertEquals("bar", expression.getValue(this));
  }
  catch (EvaluationException ex) {
    assertTrue(ex.getMessage().startsWith("EL1053E"));
  }
}

@Test
public void indexIntoGenericPropertyContainingGrowingList2() {
  List<String> property2 = new ArrayList<>();
  this.property2 = property2;
  SpelParserConfiguration configuration = new SpelParserConfiguration(true, true);
  SpelExpressionParser parser = new SpelExpressionParser(configuration);
  Expression expression = parser.parseExpression("property2");
  assertEquals("java.util.ArrayList<?>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property2, expression.getValue(this));
  expression = parser.parseExpression("property2[0]");
  try {
    assertEquals("bar", expression.getValue(this));
  }
  catch (EvaluationException ex) {
    assertTrue(ex.getMessage().startsWith("EL1053E"));
  }
}

@Test
public void indexIntoGenericPropertyContainingNullList() {
  SpelParserConfiguration configuration = new SpelParserConfiguration(true, true);
  SpelExpressionParser parser = new SpelExpressionParser(configuration);
  Expression expression = parser.parseExpression("property");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.lang.Object", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("property[0]");
  try {
    assertEquals("bar", expression.getValue(this));
  }
  catch (EvaluationException ex) {
    assertTrue(ex.getMessage().startsWith("EL1027E"));
  }
}

@Test
public void setGenericPropertyContainingListAutogrow() {
  List<Integer> property = new ArrayList<>();
  this.property = property;
  SpelExpressionParser parser = new SpelExpressionParser(new SpelParserConfiguration(true, true));
  Expression expression = parser.parseExpression("property");
  assertEquals("@org.springframework.expression.spel.IndexingTests$FieldAnnotation java.util.ArrayList<?>", expression.getValueTypeDescriptor(this).toString());
  assertEquals(property, expression.getValue(this));
  expression = parser.parseExpression("property[0]");
  try {
    expression.setValue(this, "4");
  }
  catch (EvaluationException ex) {
    assertTrue(ex.getMessage().startsWith("EL1053E"));
  }
}

assertEquals(String.class,ex.getValueTypeDescriptor().getType());
assertEquals(String.class,ex.getValueTypeDescriptor(ctx).getType());
assertEquals(String.class,ex.getValueType(new Rooty()));
assertEquals(String.class,ex.getValueType(ctx, new Rooty()));
assertEquals(String.class,ex.getValueTypeDescriptor(new Rooty()).getType());
assertEquals(String.class,ex.getValueTypeDescriptor(ctx, new Rooty()).getType());

Javadoc

Return the most general type that can be passed to a #setValuemethod using the default context.

Popular methods of Expression

getValue
Evaluate the expression in a specified context which can resolve references to properties, methods,
getExpressionString
Return the original string used to create this expression (unmodified).
setValue
Set this expression in the provided context to the value provided. The supplied root object override
getValueType
Return the most general type that can be passed to the #setValue(EvaluationContext,Object,Object) me
isWritable
Determine if an expression can be written to, i.e. setValue() can be called. The supplied root objec

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How to use getValueTypeDescriptormethodin org.springframework.expression.Expression

Best Java code snippets using org.springframework.expression.Expression.getValueTypeDescriptor (Showing top 20 results out of 315)

How to use
getValueTypeDescriptor
method
in
org.springframework.expression.Expression