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package oracle.toplink.essentials.internal.descriptors;
import java.lang.reflect.*;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.util.Set;
import oracle.toplink.essentials.exceptions.*;
import oracle.toplink.essentials.internal.helper.*;
import oracle.toplink.essentials.mappings.AttributeAccessor;
import oracle.toplink.essentials.internal.security.*;
/**
* <p><b>Purpose</b>: A wrapper class for handling cases when the domain object attributes are
* to be accessed thru the accessor methods. This could happen if the variables are not defined
* public in the domain object.
*
* @author Sati
* @since TOPLink/Java 1.0
*/
public class MethodAttributeAccessor extends AttributeAccessor {
protected String setMethodName;
protected String getMethodName;
protected transient Method setMethod;
protected transient Method getMethod;
/**
* Return the return type of the method accessor.
*/
public Class getAttributeClass() {
if (getGetMethod() == null) {
return null;
}
return getGetMethodReturnType();
}
/**
* Gets the value of an instance variable in the object.
*/
public Object getAttributeValueFromObject(Object anObject) throws DescriptorException {
try {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
return AccessController.doPrivileged(new PrivilegedMethodInvoker(getGetMethod(), anObject, (Object[])null));
} catch (PrivilegedActionException exception) {
Exception throwableException = exception.getException();
if (throwableException instanceof IllegalAccessException) {
throw DescriptorException.illegalAccessWhileGettingValueThruMethodAccessor(getGetMethodName(), anObject.getClass().getName(), throwableException);
} else {
throw DescriptorException.targetInvocationWhileGettingValueThruMethodAccessor(getGetMethodName(), anObject.getClass().getName(), throwableException);
}
}
} else {
return PrivilegedAccessHelper.invokeMethod(getGetMethod(), anObject, (Object[])null);
}
} catch (IllegalArgumentException exception) {
throw DescriptorException.illegalArgumentWhileGettingValueThruMethodAccessor(getGetMethodName(), anObject.getClass().getName(), exception);
} catch (IllegalAccessException exception) {
throw DescriptorException.illegalAccessWhileGettingValueThruMethodAccessor(getGetMethodName(), anObject.getClass().getName(), exception);
} catch (InvocationTargetException exception) {
throw DescriptorException.targetInvocationWhileGettingValueThruMethodAccessor(getGetMethodName(), anObject.getClass().getName(), exception);
} catch (NullPointerException exception) {
// Some JVM's throw this exception for some very odd reason
throw DescriptorException.nullPointerWhileGettingValueThruMethodAccessor(getGetMethodName(), anObject.getClass().getName(), exception);
}
}
/**
* Return the accessor method for the attribute accessor.
*/
protected Method getGetMethod() {
return getMethod;
}
/**
* Return the name of theh accessor method for the attribute accessor.
*/
public String getGetMethodName() {
return getMethodName;
}
public Class getGetMethodReturnType() {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
return (Class)AccessController.doPrivileged(new PrivilegedGetMethodReturnType(getGetMethod()));
} catch (PrivilegedActionException exception) {
// we should not get here since this call does not throw any checked exceptions
return null;
}
} else {
return PrivilegedAccessHelper.getMethodReturnType(getGetMethod());
}
}
/**
* Return the set method for the attribute accessor.
*/
protected Method getSetMethod() {
return setMethod;
}
/**
* Return the name of the set method for the attribute accessor.
*/
public String getSetMethodName() {
return setMethodName;
}
public Class getSetMethodParameterType() {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
return ((Class[])AccessController.doPrivileged(new PrivilegedGetMethodParameterTypes(getSetMethod())))[0];
} catch (PrivilegedActionException exception) {
// we should not get here since this call does not throw any checked exceptions
return null;
}
} else {
return PrivilegedAccessHelper.getMethodParameterTypes(getSetMethod())[0];
}
}
/**
* Set get and set method after creating these methods by using
* get and set method names
*/
public void initializeAttributes(Class theJavaClass) throws DescriptorException {
if (getAttributeName() == null) {
throw DescriptorException.attributeNameNotSpecified();
}
try {
setGetMethod(Helper.getDeclaredMethod(theJavaClass, getGetMethodName(), (Class[])null));
// The parameter type for the set method must always be the return type of the get method.
Class[] parameterTypes = new Class[1];
parameterTypes[0] = getGetMethodReturnType();
setSetMethod(Helper.getDeclaredMethod(theJavaClass, getSetMethodName(), parameterTypes));
} catch (NoSuchMethodException ex) {
DescriptorException descriptorException = DescriptorException.noSuchMethodWhileInitializingAttributesInMethodAccessor(getSetMethodName(), getGetMethodName(), theJavaClass.getName());
descriptorException.setInternalException(ex);
throw descriptorException;
} catch (SecurityException exception) {
DescriptorException descriptorException = DescriptorException.securityWhileInitializingAttributesInMethodAccessor(getSetMethodName(), getGetMethodName(), theJavaClass.getName());
descriptorException.setInternalException(exception);
throw descriptorException;
}
}
public boolean isMethodAttributeAccessor() {
return true;
}
/**
* Sets the value of the instance variable in the object to the value.
*/
public void setAttributeValueInObject(Object domainObject, Object attributeValue) throws DescriptorException {
Object[] parameters = new Object[1];
parameters[0] = attributeValue;
try {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
AccessController.doPrivileged(new PrivilegedMethodInvoker(getSetMethod(), domainObject, parameters));
} catch (PrivilegedActionException exception) {
Exception throwableException = exception.getException();
if (throwableException instanceof IllegalAccessException) {
throw DescriptorException.illegalAccessWhileSettingValueThruMethodAccessor(getSetMethodName(), attributeValue, throwableException);
} else {
throw DescriptorException.targetInvocationWhileSettingValueThruMethodAccessor(getSetMethodName(), attributeValue, throwableException);
}
}
} else {
PrivilegedAccessHelper.invokeMethod(getSetMethod(), domainObject, parameters);
}
} catch (IllegalAccessException exception) {
throw DescriptorException.illegalAccessWhileSettingValueThruMethodAccessor(getSetMethodName(), attributeValue, exception);
} catch (IllegalArgumentException exception) {
// TODO: This code should be removed, it should not be required and may cause unwanted sideeffects.
// Allow XML change set to merge correctly since new value in XML change set is always String
try {
if (attributeValue instanceof String) {
Object newValue = ConversionManager.getDefaultManager().convertObject(attributeValue, getAttributeClass());
Object[] newParameters = new Object[1];
newParameters[0] = newValue;
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
AccessController.doPrivileged(new PrivilegedMethodInvoker(getSetMethod(), domainObject, newParameters));
} catch (PrivilegedActionException exc) {
// Do nothing and move on to throw the original exception
}
} else {
PrivilegedAccessHelper.invokeMethod(getSetMethod(), domainObject, newParameters);
}
return;
}
} catch (Exception e) {
// Do nothing and move on to throw the original exception
}
throw DescriptorException.illegalArgumentWhileSettingValueThruMethodAccessor(getSetMethodName(), attributeValue, exception);
} catch (InvocationTargetException exception) {
throw DescriptorException.targetInvocationWhileSettingValueThruMethodAccessor(getSetMethodName(), attributeValue, exception);
} catch (NullPointerException exception) {
try {
// TODO: This code should be removed, it should not be required and may cause unwanted sideeffects.
// cr 3737 If a null pointer was thrown because toplink attempted to set a null referece into a
// primitive create a primitive of value 0 to set in the object.
// Is this really the best place for this? is this not why we have null-value and conversion-manager?
Class fieldClass = getSetMethodParameterType();
//Found when fixing Bug2910086
if (fieldClass.isPrimitive() && (attributeValue == null)) {
parameters[0] = ConversionManager.getDefaultManager().convertObject(new Integer(0), fieldClass);
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
AccessController.doPrivileged(new PrivilegedMethodInvoker(getSetMethod(), domainObject, parameters));
} catch (PrivilegedActionException exc) {
Exception throwableException = exc.getException();
if (throwableException instanceof IllegalAccessException) {
throw DescriptorException.nullPointerWhileSettingValueThruInstanceVariableAccessor(getAttributeName(), attributeValue, throwableException);
} else {
throw DescriptorException.nullPointerWhileSettingValueThruInstanceVariableAccessor(getAttributeName(), attributeValue, throwableException);
}
}
} else {
PrivilegedAccessHelper.invokeMethod(getSetMethod(), domainObject, parameters);
}
} else {
// Some JVM's throw this exception for some very odd reason
throw DescriptorException.nullPointerWhileSettingValueThruInstanceVariableAccessor(getAttributeName(), attributeValue, exception);
}
} catch (IllegalAccessException accessException) {
throw DescriptorException.nullPointerWhileSettingValueThruInstanceVariableAccessor(getAttributeName(), attributeValue, exception);
} catch (InvocationTargetException invocationException) {
throw DescriptorException.nullPointerWhileSettingValueThruInstanceVariableAccessor(getAttributeName(), attributeValue, exception);
}
}
}
/**
* Set the accessor method for the attribute accessor.
*/
protected void setGetMethod(Method getMethod) {
this.getMethod = getMethod;
}
/**
* Set the name of the accessor method for the attribute accessor.
*/
public void setGetMethodName(String getMethodName) {
this.getMethodName = getMethodName;
}
/**
* Set the set method for the attribute accessor.
*/
protected void setSetMethod(Method setMethod) {
this.setMethod = setMethod;
}
/**
* Set the name of the set method for the attribute accessor.
*/
public void setSetMethodName(String setMethodName) {
this.setMethodName = setMethodName;
}
}
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