XStream: Как игнорировать пробелы

Question

Можно ли при разборе с XStream игнорировать пробелы:

public class TestTest { 

    @Test 
    public void smokeTest() { 
     InputStream file = TestTest.class.getResourceAsStream("TestTest.xml"); 
     XStream xStream = new XStream(); 
     xStream.ignoreUnknownElements(); 
     xStream.processAnnotations(Mother.class); 

     Mother mother = (Mother) xStream.fromXML(file); 
    } 

    @XStreamAlias("mother") 
    public class Mother { 

     @XStreamAsAttribute 
     public String name; 

     public int age; 
    } 
} 

XML:

<?xml version="1.0" encoding="UTF-8"?> 
<mother name="Jenny"> 
     <age> 33 </age> 
</mother> 

Ошибка:

com.thoughtworks.xstream.converters.ConversionException: For input string: " 33 " : For input string: " 33 " 
---- Debugging information ---- 
message    : For input string: " 33 " 
cause-exception  : java.lang.NumberFormatException 
cause-message  : For input string: " 33 " 
class    : java.lang.Integer 
required-type  : java.lang.Integer 
converter-type  : com.thoughtworks.xstream.converters.SingleValueConverterWrapper 
wrapped-converter : com.thoughtworks.xstream.converters.basic.IntConverter 
path    : /mother/age 
line number   : 3 
class[1]   : de.mosst.xstream.test.TestTest$Mother 
converter-type[1] : com.thoughtworks.xstream.converters.reflection.ReflectionConverter 
version    : 1.4.7 
------------------------------- 
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:79) 
    at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65) 
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) 
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:474) 
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:406) 
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:257) 
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) 
    at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65) 
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) 
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) 
    at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134) 
    at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32) 
    at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1185) 
    at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1169) 
    at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1049) 
    at de.mosst.xstream.test.TestTest.smokeTest(TestTest.java:30) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) 
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) 
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) 
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) 
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) 
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) 
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) 
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) 
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) 
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) 
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) 
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363) 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) 
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) 
Caused by: java.lang.NumberFormatException: For input string: " 33 " 
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) 
    at java.lang.Long.parseLong(Long.java:578) 
    at java.lang.Long.valueOf(Long.java:776) 
    at java.lang.Long.decode(Long.java:928) 
    at com.thoughtworks.xstream.converters.basic.IntConverter.fromString(IntConverter.java:27) 
    at com.thoughtworks.xstream.converters.SingleValueConverterWrapper.fromString(SingleValueConverterWrapper.java:41) 
    at com.thoughtworks.xstream.converters.SingleValueConverterWrapper.unmarshal(SingleValueConverterWrapper.java:49) 
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) 
    ... 38 more 

Answer 1

я не нашел который будет обрезать строковые значения.

Вы можете добавить пользовательский конвертер, который будет подрезать пространства:

xStream.registerConverter(new IntConverter() { 
     @Override 
     public Object fromString(String str) { 
      return super.fromString(str.trim()); 
     } 

    }); 

В качестве альтернативы, вы можете добавить обертку для ввода Preprocess для всех SingleValueConverters:

XStream xStream = new XStream() { 
     @Override 
     public void registerConverter(SingleValueConverter converter, int priority) { 
      SingleValueConverter stringPreprocessor = new SingleValueConverterWrapper(converter) { 

       @Override 
       public Object fromString(String str) { 
        // You can trim whitespace or do other preprocessing here 
        return converter.fromString(str.trim()); 
       } 

      }; 
      super.registerConverter(stringPreprocessor, priority); 
     } 
    };