/*
* Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
*
* 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 freemarker.ext.beans;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import freemarker.ext.beans.BeansWrapper.MethodAppearanceDecision;
import freemarker.ext.beans.BeansWrapper.MethodAppearanceDecisionInput;
class GetlessMethodsAsPropertyGettersRule implements MethodAppearanceFineTuner, SingletonCustomizer {
static final GetlessMethodsAsPropertyGettersRule INSTANCE = new GetlessMethodsAsPropertyGettersRule();
// Can't be constructed from outside
private GetlessMethodsAsPropertyGettersRule() { }
public void process(
MethodAppearanceDecisionInput in, MethodAppearanceDecision out) {
legacyProcess(in.getContainingClass(), in.getMethod(), out);
}
/** This only exists as the tests need to call this through the deprecated method too. */
public void legacyProcess(
Class clazz, Method m, MethodAppearanceDecision decision) {
if (m.getDeclaringClass() != Object.class
&& m.getReturnType() != void.class
&& m.getParameterTypes().length == 0) {
String mName = m.getName();
if (!looksLikePropertyReadMethod(mName)) {
decision.setExposeMethodAs(null);
try {
decision.setExposeAsProperty(new PropertyDescriptor(
mName, clazz, mName, null));
} catch (IntrospectionException e) { // Won't happen...
throw new RuntimeException(e);
}
}
}
}
private static boolean looksLikePropertyReadMethod(String name) {
final int verbEnd;
if (name.startsWith("get")) verbEnd = 3;
else if (name.startsWith("is")) verbEnd = 2;
else return false;
return name.length() == verbEnd || Character.isUpperCase(name.charAt(verbEnd));
}
}