/*
* Copyright 2016 Christoph Böhme
*
* 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.culturegraph.mf.javaintegration.pojo;
import java.beans.Introspector;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import org.culturegraph.mf.framework.MetafactureException;
/**
* Invokes a setter method on an object. The method must be public, have exactly
* one argument and its name must begin with "set&quto;.
*
* @author Thomas Seidel
*/
class MethodValueSetter implements ValueSetter {
private static final String METHOD_PREFIX = "set";
private final String name;
private final Method method;
MethodValueSetter(final Method method) {
assert supportsMethod(method);
this.method = method;
// remove prefix then lower case first character
name = Introspector.decapitalize(method.getName().substring(
METHOD_PREFIX.length()));
}
static boolean supportsMethod(final Method m) {
return Modifier.isPublic(m.getModifiers())
&& m.getName().length() > METHOD_PREFIX.length()
&& m.getName().startsWith(METHOD_PREFIX)
&& m.getParameterTypes().length == 1;
}
@Override
public void setValue(final Object object, final Object value) {
try {
method.invoke(object, value);
} catch (final IllegalArgumentException e) {
throw new MetafactureException(
"The given object don't have a method named "
+ method.getName(), e);
} catch (final IllegalAccessException e) {
throw new MetafactureException("Can't access the method named "
+ method.getName(), e);
} catch (final InvocationTargetException e) {
throw new MetafactureException("Invoking the method named "
+ method.getName() + " throws an excpetion", e);
}
}
@Override
public String getName() {
return name;
}
@Override
public ValueType getValueType() {
return new ValueType(method.getParameterTypes()[0],
method.getGenericParameterTypes()[0]);
}
}