com.threewks.thundr.route.controller.Controller.java Source code

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Here is the source code for com.threewks.thundr.route.controller.Controller.java

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/*
 * This file is a component of thundr, a software library from 3wks.
 * Read more: http://3wks.github.io/thundr/
 * Copyright (C) 2014 3wks, <thundr@3wks.com.au>
 *
 * 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 com.threewks.thundr.route.controller;

import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.StringUtils;

import com.threewks.thundr.introspection.ParameterDescription;
import com.threewks.thundr.route.RouteResolverException;
import com.threewks.thundr.route.RouteResult;

import jodd.paramo.MethodParameter;
import jodd.paramo.Paramo;
import jodd.util.ReflectUtil;

public class Controller implements RouteResult {
    private Class<?> class1;
    private Method method;

    private List<ParameterDescription> parameters = new ArrayList<ParameterDescription>();

    public Controller(Class<?> class1, String methodName) {
        this.class1 = class1;
        this.method = ReflectUtil.findMethod(class1, methodName);
        if (this.method == null) {
            throw new RouteResolverException("Unable to create %s - the method %s.%s does not exist",
                    getClass().getSimpleName(), class1.getName(), methodName);
        }
        Type[] genericParameters = method.getGenericParameterTypes();
        MethodParameter[] parameterNames = Paramo.resolveParameters(method);
        for (int i = 0; i < genericParameters.length; i++) {
            String name = parameterNames[i].getName();
            this.parameters.add(new ParameterDescription(name, genericParameters[i]));
        }
    }

    public List<ParameterDescription> parameters() {
        return parameters;
    }

    public Object invoke(Object controller, List<?> args) throws Exception {
        return method.invoke(controller, args.toArray());
    }

    @Override
    public String toString() {
        return class1.getSimpleName() + "." + method.getName();
    }

    @SuppressWarnings("unchecked")
    public <T> Class<T> type() {
        return (Class<T>) class1;
    }

    public Method method() {
        return method;
    }

    static final String classNameForAction(String actionName) {
        return StringUtils.substringBeforeLast(actionName, ".");
    }

    static final String methodNameForAction(String actionName) {
        return StringUtils.substringAfterLast(actionName, ".");
    }
}