net.sf.rubycollect4j.RubyObject Maven / Gradle / Ivy
/**
*
* @author Wei-Ming Wu
*
*
* Copyright 2013 Wei-Ming Wu
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*
*/
package net.sf.rubycollect4j;
import java.lang.reflect.Method;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* RubyObject provides the general methods of Ruby objects.
*
*/
public final class RubyObject {
private static final Logger logger = Logger.getLogger(RubyObject.class
.getName());
private RubyObject() {}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param args
* arguments of the method
* @return the result of the method called
*/
@SuppressWarnings("unchecked")
public static E send(Object o, String methodName, Object... args) {
try {
for (Method method : o.getClass().getMethods()) {
if (method.getName().equals(methodName)) {
boolean isArgsMatched = true;
for (int i = 0; i < method.getParameterTypes().length; i++) {
if (i >= args.length || args[i] == null)
continue;
if (!isConvertable(method.getParameterTypes()[i],
args[i].getClass()))
isArgsMatched = false;
}
if (isArgsMatched && method.getParameterTypes().length == args.length)
return (E) method.invoke(o, args);
}
}
throw new NoSuchMethodException();
} catch (NoSuchMethodException e) {
logger.log(Level.SEVERE, null, e);
throw new IllegalArgumentException("NoMethodError: undefined method `"
+ methodName + "' for " + o + ":" + o.getClass().getName());
} catch (Exception e) {
logger.log(Level.SEVERE, null, e);
throw new RuntimeException(e);
}
}
private static boolean isConvertable(Class klass1, Class klass2) {
if (klass1 == byte.class)
return klass2 == Byte.class;
else if (klass1 == short.class)
return klass2 == Short.class;
else if (klass1 == int.class)
return klass2 == Integer.class;
else if (klass1 == long.class)
return klass2 == Long.class;
else if (klass1 == float.class)
return klass2 == Float.class;
else if (klass1 == double.class)
return klass2 == Double.class;
else if (klass1 == boolean.class)
return klass2 == Boolean.class;
else if (klass1 == char.class)
return klass2 == Character.class;
else
return klass1.isAssignableFrom(klass2);
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a Byte
* @return the result of the method called
*/
public static E send(Object o, String methodName, Byte arg) {
return send(o, methodName, (Object) arg);
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a byte
* @return the result of the method called
*/
@SuppressWarnings("unchecked")
public static E send(Object o, String methodName, byte arg) {
try {
Method method = o.getClass().getMethod(methodName, byte.class);
return (E) method.invoke(o, arg);
} catch (Exception e) {
return send(o, methodName, (Object) arg);
}
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a Short
* @return the result of the method called
*/
public static E send(Object o, String methodName, Short arg) {
return send(o, methodName, (Object) arg);
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a short
* @return the result of the method called
*/
@SuppressWarnings("unchecked")
public static E send(Object o, String methodName, short arg) {
try {
Method method = o.getClass().getMethod(methodName, short.class);
return (E) method.invoke(o, arg);
} catch (Exception e) {
return send(o, methodName, (Object) arg);
}
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* an Integer
* @return the result of the method called
*/
public static E send(Object o, String methodName, Integer arg) {
return send(o, methodName, (Object) arg);
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* an int
* @return the result of the method called
*/
@SuppressWarnings("unchecked")
public static E send(Object o, String methodName, int arg) {
try {
Method method = o.getClass().getMethod(methodName, int.class);
return (E) method.invoke(o, arg);
} catch (Exception e) {
return send(o, methodName, (Object) arg);
}
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a Long
* @return the result of the method called
*/
public static E send(Object o, String methodName, Long arg) {
return send(o, methodName, (Object) arg);
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a long
* @return the result of the method called
*/
@SuppressWarnings("unchecked")
public static E send(Object o, String methodName, long arg) {
try {
Method method = o.getClass().getMethod(methodName, long.class);
return (E) method.invoke(o, arg);
} catch (Exception e) {
return send(o, methodName, (Object) arg);
}
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a Float
* @return the result of the method called
*/
public static E send(Object o, String methodName, Float arg) {
return send(o, methodName, (Object) arg);
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a float
* @return the result of the method called
*/
@SuppressWarnings("unchecked")
public static E send(Object o, String methodName, float arg) {
try {
Method method = o.getClass().getMethod(methodName, float.class);
return (E) method.invoke(o, arg);
} catch (Exception e) {
return send(o, methodName, (Object) arg);
}
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a Double
* @return the result of the method called
*/
public static E send(Object o, String methodName, Double arg) {
return send(o, methodName, (Object) arg);
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a double
* @return the result of the method called
*/
@SuppressWarnings("unchecked")
public static E send(Object o, String methodName, double arg) {
try {
Method method = o.getClass().getMethod(methodName, double.class);
return (E) method.invoke(o, arg);
} catch (Exception e) {
return send(o, methodName, (Object) arg);
}
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a Boolean
* @return the result of the method called
*/
public static E send(Object o, String methodName, Boolean arg) {
return send(o, methodName, (Object) arg);
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a boolean
* @return the result of the method called
*/
@SuppressWarnings("unchecked")
public static E send(Object o, String methodName, boolean arg) {
try {
Method method = o.getClass().getMethod(methodName, boolean.class);
return (E) method.invoke(o, arg);
} catch (Exception e) {
return send(o, methodName, (Object) arg);
}
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a Character
* @return the result of the method called
*/
public static E send(Object o, String methodName, Character arg) {
return send(o, methodName, (Object) arg);
}
/**
* Executes a method of any Object by Java reflection.
*
* @param o
* an Object
* @param methodName
* name of the method
* @param arg
* a char
* @return the result of the method called
*/
@SuppressWarnings("unchecked")
public static E send(Object o, String methodName, char arg) {
try {
Method method = o.getClass().getMethod(methodName, char.class);
return (E) method.invoke(o, arg);
} catch (Exception e) {
return send(o, methodName, (Object) arg);
}
}
}
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