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TMC-LANG: Code clean-up, added tests and fixed issues.

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This commit is contained in:
Harald Kuhr
2013-06-06 19:51:07 +02:00
parent f5b5e818c5
commit cdce0aebff
5 changed files with 182 additions and 97 deletions
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59
common/common-lang/src/main/java/com/twelvemonkeys/lang/BeanUtil.java
View File

@@ -41,8 +41,7 @@ import java.util.Arrays;
/**
* A utility class with some useful bean-related functions.
* <p/>
* <em>NOTE: This class is not considered part of the public API and may be
* changed without notice</em>
* <em>NOTE: This class is not considered part of the public API and may be changed without notice</em>
*
* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
* @author last modified by $Author: haku $
@@ -60,10 +59,10 @@ public final class BeanUtil {
* Now supports getting values from properties of properties
* (recursive).
*
* @param pObject The object to get the property from
* @param pObject The object to get the property from
* @param pProperty The name of the property
*
* @return A string containing the value of the given property, or null
* @return A string containing the value of the given property, or {@code null}
* if it can not be found.
* @todo Remove System.err's... Create new Exception? Hmm..
*/
@@ -77,7 +76,7 @@ public final class BeanUtil {
return null;
}
Class objClass = pObject.getClass();
Class<?> objClass = pObject.getClass();
Object result = pObject;
@@ -154,9 +153,8 @@ public final class BeanUtil {
catch (NoSuchMethodException e) {
System.err.print("No method named \"" + methodName + "()\"");
// The array might be of size 0...
if (paramClass != null && paramClass.length > 0) {
System.err.print(" with the parameter "
+ paramClass[0].getName());
if (paramClass.length > 0 && paramClass[0] != null) {
System.err.print(" with the parameter " + paramClass[0].getName());
}
System.err.println(" in class " + objClass.getName() + "!");
@@ -177,8 +175,7 @@ public final class BeanUtil {
result = method.invoke(result, param);
}
catch (InvocationTargetException e) {
System.err.println("property=" + pProperty + " & result="
+ result + " & param=" + Arrays.toString(param));
System.err.println("property=" + pProperty + " & result=" + result + " & param=" + Arrays.toString(param));
e.getTargetException().printStackTrace();
e.printStackTrace();
return null;
@@ -188,8 +185,7 @@ public final class BeanUtil {
return null;
}
catch (NullPointerException e) {
System.err.println(objClass.getName() + "." + method.getName()
+ "(" + ((paramClass != null && paramClass.length > 0) ? paramClass[0].getName() : "") + ")");
System.err.println(objClass.getName() + "." + method.getName() + "(" + ((paramClass.length > 0 && paramClass[0] != null) ? paramClass[0].getName() : "") + ")");
e.printStackTrace();
return null;
}
@@ -221,10 +217,8 @@ public final class BeanUtil {
* @throws IllegalAccessException if the caller class has no access to the
* write method
*/
public static void setPropertyValue(Object pObject, String pProperty,
Object pValue)
throws NoSuchMethodException, InvocationTargetException,
IllegalAccessException {
public static void setPropertyValue(Object pObject, String pProperty, Object pValue)
throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
//
// TODO: Support set(Object, Object)/put(Object, Object) methods
@@ -255,7 +249,8 @@ public final class BeanUtil {
method.invoke(obj, params);
}
private static Method getMethodMayModifyParams(Object pObject, String pName, Class[] pParams, Object[] pValues) throws NoSuchMethodException {
private static Method getMethodMayModifyParams(Object pObject, String pName, Class[] pParams, Object[] pValues)
throws NoSuchMethodException {
// NOTE: This method assumes pParams.length == 1 && pValues.length == 1
Method method = null;
@@ -307,10 +302,8 @@ public final class BeanUtil {
if (method == null) {
Method[] methods = pObject.getClass().getMethods();
for (Method candidate : methods) {
if (Modifier.isPublic(candidate.getModifiers())
&& candidate.getName().equals(pName)
&& candidate.getReturnType() == Void.TYPE
&& candidate.getParameterTypes().length == 1) {
if (Modifier.isPublic(candidate.getModifiers()) && candidate.getName().equals(pName)
&& candidate.getReturnType() == Void.TYPE && candidate.getParameterTypes().length == 1) {
// NOTE: Assumes paramTypes.length == 1
Class type = candidate.getParameterTypes()[0];
@@ -337,7 +330,7 @@ public final class BeanUtil {
return method;
}
private static Object convertValueToType(Object pValue, Class pType) throws ConversionException {
private static Object convertValueToType(Object pValue, Class<?> pType) throws ConversionException {
if (pType.isPrimitive()) {
if (pType == Boolean.TYPE && pValue instanceof Boolean) {
return pValue;
@@ -395,7 +388,7 @@ public final class BeanUtil {
* @throws InvocationTargetException if the constructor failed
*/
// TODO: Move to ReflectUtil
public static Object createInstance(Class pClass, Object pParam)
public static <T> T createInstance(Class<T> pClass, Object pParam)
throws InvocationTargetException {
return createInstance(pClass, new Object[] {pParam});
}
@@ -414,9 +407,9 @@ public final class BeanUtil {
* @throws InvocationTargetException if the constructor failed
*/
// TODO: Move to ReflectUtil
public static Object createInstance(Class pClass, Object... pParams)
public static <T> T createInstance(Class<T> pClass, Object... pParams)
throws InvocationTargetException {
Object value;
T value;
try {
// Create param and argument arrays
@@ -429,8 +422,7 @@ public final class BeanUtil {
}
// Get constructor
//Constructor constructor = pClass.getDeclaredConstructor(paramTypes);
Constructor constructor = pClass.getConstructor(paramTypes);
Constructor<T> constructor = pClass.getConstructor(paramTypes);
// Invoke and create instance
value = constructor.newInstance(pParams);
@@ -468,12 +460,11 @@ public final class BeanUtil {
* If the return type of the method is void, null is returned.
* If the method could not be invoked for any reason, null is returned.
*
* @throws InvocationTargetException if the invocaton failed
* @throws InvocationTargetException if the invocation failed
*/
// TODO: Move to ReflectUtil
// TODO: Rename to invokeStatic?
public static Object invokeStaticMethod(Class pClass, String pMethod,
Object pParam)
public static Object invokeStaticMethod(Class<?> pClass, String pMethod, Object pParam)
throws InvocationTargetException {
return invokeStaticMethod(pClass, pMethod, new Object[] {pParam});
@@ -492,12 +483,11 @@ public final class BeanUtil {
* If the return type of the method is void, null is returned.
* If the method could not be invoked for any reason, null is returned.
*
* @throws InvocationTargetException if the invocaton failed
* @throws InvocationTargetException if the invocation failed
*/
// TODO: Move to ReflectUtil
// TODO: Rename to invokeStatic?
public static Object invokeStaticMethod(Class pClass, String pMethod,
Object[] pParams)
public static Object invokeStaticMethod(Class<?> pClass, String pMethod, Object... pParams)
throws InvocationTargetException {
Object value = null;
@@ -518,8 +508,7 @@ public final class BeanUtil {
Method method = pClass.getMethod(pMethod, paramTypes);
// Invoke public static method
if (Modifier.isPublic(method.getModifiers())
&& Modifier.isStatic(method.getModifiers())) {
if (Modifier.isPublic(method.getModifiers()) && Modifier.isStatic(method.getModifiers())) {
value = method.invoke(null, pParams);
}

24
common/common-lang/src/main/java/com/twelvemonkeys/util/convert/Converter.java
View File

@@ -36,7 +36,7 @@ import java.util.Map;
/**
* The converter (singleton). Converts strings to objects and back.
* This is the entrypoint to the converter framework.
* This is the entry point to the converter framework.
* <p/>
* By default, converters for {@link com.twelvemonkeys.util.Time}, {@link Date}
* and {@link Object}
@@ -53,17 +53,17 @@ import java.util.Map;
*/
// TODO: Get rid of singleton stuff
// Can probably be a pure static class, but is that a good idea?
// Maybe have BeanUtil act as a "proxy", and hide this class alltogheter?
// Maybe have BeanUtil act as a "proxy", and hide this class all together?
// TODO: ServiceRegistry for registering 3rd party converters
// TODO: URI scheme, for implicit typing? Is that a good idea?
// TODO: Array converters?
public abstract class Converter implements PropertyConverter {
/** Our singleton instance */
protected static Converter sInstance = new ConverterImpl(); // Thread safe & EASY
protected static final Converter sInstance = new ConverterImpl(); // Thread safe & EASY
/** The conveters Map */
protected Map converters = new Hashtable();
/** The converters Map */
protected final Map<Class, PropertyConverter> converters = new Hashtable<Class, PropertyConverter>();
// Register our predefined converters
static {
@@ -115,20 +115,21 @@ public abstract class Converter implements PropertyConverter {
*
* @see #unregisterConverter(Class)
*/
public static void registerConverter(Class pType, PropertyConverter pConverter) {
public static void registerConverter(final Class<?> pType, final PropertyConverter pConverter) {
getInstance().converters.put(pType, pConverter);
}
/**
* Unregisters a converter for a given type. That is, making it unavailable
* Un-registers a converter for a given type. That is, making it unavailable
* for the converter framework, and making it (potentially) available for
* garbabe collection.
* garbage collection.
*
* @param pType the (super) type to remove converter for
*
* @see #registerConverter(Class,PropertyConverter)
*/
public static void unregisterConverter(Class pType) {
@SuppressWarnings("UnusedDeclaration")
public static void unregisterConverter(final Class<?> pType) {
getInstance().converters.remove(pType);
}
@@ -143,8 +144,7 @@ public abstract class Converter implements PropertyConverter {
* @throws ConversionException if the string cannot be converted for any
* reason.
*/
public Object toObject(String pString, Class pType)
throws ConversionException {
public Object toObject(final String pString, final Class pType) throws ConversionException {
return toObject(pString, pType, null);
}
@@ -174,7 +174,7 @@ public abstract class Converter implements PropertyConverter {
* @throws ConversionException if the object cannot be converted to a
* string for any reason.
*/
public String toString(Object pObject) throws ConversionException {
public String toString(final Object pObject) throws ConversionException {
return toString(pObject, null);
}

65
common/common-lang/src/main/java/com/twelvemonkeys/util/convert/DefaultConverter.java
View File

@@ -67,9 +67,9 @@ public final class DefaultConverter implements PropertyConverter {
*
* @throws ConversionException if the type is null, or if the string cannot
* be converted into the given type, using a string constructor or static
* {@code valueof} method.
* {@code valueOf} method.
*/
public Object toObject(String pString, final Class pType, String pFormat) throws ConversionException {
public Object toObject(final String pString, final Class pType, final String pFormat) throws ConversionException {
if (pString == null) {
return null;
}
@@ -87,13 +87,7 @@ public final class DefaultConverter implements PropertyConverter {
// But what about generic type?! It's erased...
// Primitive -> wrapper
Class type;
if (pType == Boolean.TYPE) {
type = Boolean.class;
}
else {
type = pType;
}
Class type = unBoxType(pType);
try {
// Try to create instance from <Constructor>(String)
@@ -101,13 +95,15 @@ public final class DefaultConverter implements PropertyConverter {
if (value == null) {
// createInstance failed for some reason
// Try to invoke the static method valueof(String)
// Try to invoke the static method valueOf(String)
value = BeanUtil.invokeStaticMethod(type, "valueOf", pString);
if (value == null) {
// If the value is still null, well, then I cannot help...
throw new ConversionException("Could not convert String to " + pType.getName() + ": No constructor " + type.getName() + "(String) or static " + type.getName() + ".valueof(String) method found!");
throw new ConversionException(String.format(
"Could not convert String to %1$s: No constructor %1$s(String) or static %1$s.valueOf(String) method found!",
type.getName()
));
}
}
@@ -116,12 +112,15 @@ public final class DefaultConverter implements PropertyConverter {
catch (InvocationTargetException ite) {
throw new ConversionException(ite.getTargetException());
}
catch (ConversionException ce) {
throw ce;
}
catch (RuntimeException rte) {
throw new ConversionException(rte);
}
}
private Object toArray(String pString, Class pType, String pFormat) {
private Object toArray(final String pString, final Class pType, final String pFormat) {
String[] strings = StringUtil.toStringArray(pString, pFormat != null ? pFormat : StringUtil.DELIMITER_STRING);
Class type = pType.getComponentType();
if (type == String.class) {
@@ -152,10 +151,9 @@ public final class DefaultConverter implements PropertyConverter {
* @param pObject the object to convert.
* @param pFormat ignored.
*
* @return the string representation of the object, or {@code null} if
* {@code pObject == null}
* @return the string representation of the object, or {@code null} if {@code pObject == null}
*/
public String toString(Object pObject, String pFormat)
public String toString(final Object pObject, final String pFormat)
throws ConversionException {
try {
@@ -170,7 +168,7 @@ public final class DefaultConverter implements PropertyConverter {
return pFormat == null ? StringUtil.toCSVString(pArray) : StringUtil.toCSVString(pArray, pFormat);
}
private Object[] toObjectArray(Object pObject) {
private Object[] toObjectArray(final Object pObject) {
// TODO: Extract util method for wrapping/unwrapping native arrays?
Object[] array;
Class<?> componentType = pObject.getClass().getComponentType();
@@ -232,4 +230,37 @@ public final class DefaultConverter implements PropertyConverter {
}
return array;
}
private Class<?> unBoxType(final Class<?> pType) {
if (pType.isPrimitive()) {
if (pType == boolean.class) {
return Boolean.class;
}
if (pType == byte.class) {
return Byte.class;
}
if (pType == char.class) {
return Character.class;
}
if (pType == short.class) {
return Short.class;
}
if (pType == int.class) {
return Integer.class;
}
if (pType == float.class) {
return Float.class;
}
if (pType == long.class) {
return Long.class;
}
if (pType == double.class) {
return Double.class;
}
throw new IllegalArgumentException("Unknown type: " + pType);
}
return pType;
}
}