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Add error messages to FillStrategy 

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@805588 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Pinaki Poddar 2009-08-18 21:27:42 +00:00
parent 30a7da0ba2
commit b11cdae338
2 changed files with 75 additions and 24 deletions
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75
openjpa-kernel/src/main/java/org/apache/openjpa/kernel/FillStrategy.java
View File

@ -21,15 +21,17 @@ package org.apache.openjpa.kernel;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import org.apache.openjpa.enhance.Reflection;
import org.apache.openjpa.lib.util.Localizer;
/**
* A strategy to fill data into a {@link ResultShape}.
* <BR>
* Available strategy implementations can fill by invoking constructor, setting array elements, direct assignment,
* invoking put(key,value)-style methods or a constructing by a factory.
* invoking put(key,value)-style method on Map or factory-constructed instance.
*
* @author Pinaki Poddar
*
@ -37,6 +39,8 @@ import org.apache.openjpa.enhance.Reflection;
*
*/
public interface FillStrategy<T> {
static final Localizer _loc = Localizer.forPackage(FillStrategy.class);
T fill(Object[] data, Class<?>[] types, String[] aliases);
@ -48,8 +52,8 @@ public interface FillStrategy<T> {
public static class Array<T> implements FillStrategy<T> {
private final Class<?> cls;
public Array(Class<T> arrayCls) {
if (!arrayCls.isArray())
throw new IllegalArgumentException(arrayCls + " is not an array");
if (arrayCls == null || !arrayCls.isArray())
throw new IllegalArgumentException(_loc.get("fill-bad-array", arrayCls).getMessage());
this.cls = arrayCls.getComponentType();
}
@ -70,19 +74,24 @@ public interface FillStrategy<T> {
private final Method putMethod;
public Map(Method put) {
if (put == null || put.getParameterTypes().length != 2)
throw new IllegalArgumentException(_loc.get("fill-bad-put", put).getMessage());
putMethod = put;
}
public T fill(Object[] values, Class<?>[] types, String[] aliases) {
int i = 0;
try {
Object map = putMethod.getDeclaringClass().newInstance();
for (int i = 0; i < values.length; i++)
for (i = 0; i < values.length; i++)
putMethod.invoke(map, aliases[i], values[i]);
return (T)map;
} catch (InvocationTargetException t) {
throw new RuntimeException(t.getTargetException());
throw new RuntimeException(_loc.get("fill-map-error", putMethod, aliases[i], values[i]).getMessage(),
t.getTargetException());
} catch (Exception e) {
throw new RuntimeException(e);
throw new RuntimeException(_loc.get("fill-map-error", putMethod, aliases[i], values[i]).getMessage(),
e);
}
}
@ -94,6 +103,7 @@ public interface FillStrategy<T> {
public static class NewInstance<T> implements FillStrategy<T> {
private Constructor<? extends T> cons;
private Class<T> cls;
public NewInstance(Constructor<? extends T> cons) {
this.cons = cons;
}
@ -110,7 +120,7 @@ public interface FillStrategy<T> {
try {
return cls.getConstructor(types);
} catch (Exception e) {
throw new RuntimeException(e);
throw new RuntimeException(_loc.get("fill-ctor-none", cls, Arrays.toString(types)).getMessage());
}
}
@ -124,7 +134,8 @@ public interface FillStrategy<T> {
}
return cons.newInstance(values);
} catch (Exception e) {
throw new RuntimeException(e);
throw new RuntimeException(_loc.get("fill-ctor-error", cons, Arrays.toString(values),
Arrays.toString(types)).getMessage(), e);
}
}
@ -142,23 +153,28 @@ public interface FillStrategy<T> {
this.cls = cls;
}
public T fill(Object[] args, Class<?>[] types, String[] aliases) {
public T fill(Object[] values, Class<?>[] types, String[] aliases) {
int i = 0;
try {
if (setters == null) {
setters = new Method[args.length];
setters = new Method[values.length];
}
T bean = cls.newInstance();
for (int i = 0; i < args.length; i++) {
for (i = 0; i < values.length; i++) {
if (setters[i] == null) {
setters[i] = Reflection.findSetter(cls, aliases[i], true);
setters[i] = Reflection.findSetter(cls, aliases[i], false);
if (setters[i] == null)
throw new RuntimeException(_loc.get("fill-bean-setter", cls, aliases[i]).getMessage());
}
setters[i].invoke(bean, args[i]);
setters[i].invoke(bean, Filters.convert(values[i], types[i]));
}
return bean;
} catch (InvocationTargetException t) {
throw new RuntimeException(t.getTargetException());
throw new RuntimeException(_loc.get("fill-bean-error", setters[i], values[i], types[i]).getMessage(),
t.getTargetException());
} catch (Exception e) {
throw new RuntimeException(e);
throw new RuntimeException(_loc.get("fill-bean-error", setters[i], values[i], types[i]).getMessage(),
e);
}
}
}
@ -168,8 +184,13 @@ public interface FillStrategy<T> {
* Populate an instance by simply assigning the 0-th element of the input values.
*/
public static class Assign<T> implements FillStrategy<T> {
public T fill(Object[] args, Class<?>[] types, String[] aliases) {
return (T)args[0];
public T fill(Object[] values, Class<?>[] types, String[] aliases) {
try {
return (T)values[0];
} catch (Exception e) {
throw new RuntimeException(_loc.get("fill-assign-error", Arrays.toString(values),
Arrays.toString(types)).getMessage(), e);
}
}
}
@ -183,23 +204,31 @@ public interface FillStrategy<T> {
final Method putMethod;
final boolean isArray;
public Factory(ObjectFactory<T> factory, Method putMethod) {
public Factory(ObjectFactory<T> factory, Method put) {
this.factory = factory;
this.putMethod = putMethod;
this.putMethod = put;
if (put == null || put.getParameterTypes().length != 2)
throw new IllegalArgumentException(_loc.get("fill-factory-bad-put", put).getMessage());
Class<?> keyType = putMethod.getParameterTypes()[0];
this.isArray = keyType == int.class || keyType == Integer.class;
}
public T fill(Object[] values, Class<?>[] types, String[] aliases) {
int i = 0;
Object key = null;
T result = factory.newInstance();
try {
for (int i = 0; i < values.length; i++)
putMethod.invoke(result, isArray ? i : aliases[i], values[i]);
for (i = 0; i < values.length; i++) {
key = isArray ? i : aliases[i];
putMethod.invoke(result, key, Filters.convert(values[i], types[i]));
}
return result;
} catch (InvocationTargetException t) {
throw new RuntimeException(t.getTargetException());
throw new RuntimeException(_loc.get("fill-factory-error", new Object[]{putMethod, key, values[i],
types[i]}).getMessage(), t.getTargetException());
} catch (Exception e) {
throw new RuntimeException(e);
throw new RuntimeException(_loc.get("fill-factory-error", new Object[]{putMethod, key, values[i],
types[i]}).getMessage(), e);
}
}
}

22
openjpa-kernel/src/main/resources/org/apache/openjpa/kernel/localizer.properties
View File

@ -423,3 +423,25 @@ declared-unbound-params: User specified parameter "{1}" does not appear in \
declared parameters "{2}" of the query "{0}".
user-unbound-params: User has not bound parameter "{1}" for the query "{0}". \
The declared parameters are "{2}", bound parameters are "{3}".
fill-bad-array: Can not apply array fill strategy on "{0}" because it is not \
an array type.
fill-bad-put: Can not apply map fill strategy using method "{0}". The method \
to fill must have two input arguments.
fill-map-error: Error while filling data with map strategy. The error occurred \
while invoking "{0}" with input argument "{1}" and "{2}". See nested \
exception for details.
fill-ctor-none: Can not find constructor for "{0}" with argument types "{1}" \
to fill data.
fill-ctor-error: Error while filling data with constructor strategy. The error \
occurred while invoking constructor "{0}" with input argument "{1}" of \
types "{2}". See nested exception for details.
fill-bean-setter: Can not find a setter method on "{0}" for property "{1}" \
to apply JavaBean fill strategy.
fill-bean-error: Error while filling data with JavaBean strategy. The error \
occurred while invoking bean method "{0}" with input argument "{1}" of \
types "{2}". See nested exception for details.
fill-assign-error: Error while assigning data from values "{0}" of types \
"{1}". See nested exception for details.
fill-factory-error: Error while fill data with factory strategy. The error \
occurred while invoking "{0}" with key "{1}" and value "{2}" of type "{3}". \
See nested exception for details.