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/**
*
* Copyright 2006 The Apache Software Foundation
*
* 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 org.apache.tuscany.core.loader.impl;
import org.apache.tuscany.core.builder.ObjectFactory;
import org.apache.tuscany.core.config.ConfigurationLoadException;
import org.apache.tuscany.core.injection.SingletonObjectFactory;
import org.apache.tuscany.core.loader.StAXPropertyFactory;
import org.apache.tuscany.model.assembly.Property;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import java.beans.PropertyEditor;
import java.beans.PropertyEditorManager;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import org.osoa.sca.annotations.Scope;
import org.osoa.sca.annotations.Service;
/**
* @version $Rev$ $Date$
*/
@Scope("MODULE")
@Service(interfaces = {StAXPropertyFactory.class})
public class StringParserPropertyFactory implements StAXPropertyFactory {
public ObjectFactory<?> createObjectFactory(XMLStreamReader reader, Property property) throws XMLStreamException, ConfigurationLoadException {
Class<?> type = property.getType();
assert type != null : "property type is null";
String text = reader.getElementText();
// degenerate case where we are returning a String
if (String.class.equals(type)) {
return new SingletonObjectFactory(text);
}
// special handler to convert hexBinary to a byte[]
if (byte[].class.equals(type)) {
byte[] instance = new byte[text.length() >> 1];
for (int i = 0; i < instance.length; i++) {
instance[i] = (byte) (Character.digit(text.charAt(i << 1), 16) << 4 | Character.digit(text.charAt((i << 1) + 1), 16));
}
return new SingletonObjectFactory(instance);
}
// does this type have a static valueOf(String) method?
try {
Method valueOf = type.getMethod("valueOf", String.class);
if (Modifier.isStatic(valueOf.getModifiers())) {
try {
return new SingletonObjectFactory(valueOf.invoke(null, text));
} catch (IllegalAccessException e) {
throw new AssertionError("getMethod returned an inaccessible method");
} catch (InvocationTargetException e) {
// FIXME we should throw something better
throw new ConfigurationLoadException(e.getCause());
}
}
} catch (NoSuchMethodException e) {
// try something else
}
// does this type have a constructor that takes a String?
try {
Constructor<?> ctr = type.getConstructor(String.class);
return new SingletonObjectFactory(ctr.newInstance(text));
} catch (NoSuchMethodException e) {
// try something else
} catch (IllegalAccessException e) {
throw new AssertionError("getConstructor returned an inaccessible method");
} catch (InstantiationException e) {
throw new ConfigurationLoadException("Property type cannot be instantiated: " + type.getName());
} catch (InvocationTargetException e) {
// FIXME we should throw something better
throw new ConfigurationLoadException(e.getCause());
}
// do we have a property editor for it?
PropertyEditor editor = PropertyEditorManager.findEditor(type);
if (editor != null) {
try {
editor.setAsText(text);
return new SingletonObjectFactory(editor.getValue());
} catch (IllegalArgumentException e) {
// FIXME we should throw something better
throw new ConfigurationLoadException(e);
}
}
// FIXME we should throw something better
throw new ConfigurationLoadException("Do not have a way to parse a String into a " + type.getName());
}
}
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