de.akquinet.engineering.vaadin.vaangular.angular.MethodInvoker.java Source code

Introduction

Here is the source code for de.akquinet.engineering.vaadin.vaangular.angular.MethodInvoker.java

Source

/*
 * Copyright 2015 akquinet engineering GmbH
 *  
 * 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 de.akquinet.engineering.vaadin.vaangular.angular;

import com.vaadin.ui.JavaScriptFunction;

import elemental.json.JsonArray;

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

/**
 * @author Axel Meier, akquinet engineering GmbH
 */
public class MethodInvoker implements JavaScriptFunction {
    private static final long serialVersionUID = 1L;

    private final Object object;
    private final Method method;

    public MethodInvoker(final Object object, final Method method) {
        this.object = object;
        this.method = method;
    }

    @Override
    public void call(final JsonArray arguments) {
        try {
            final Class<?>[] paramTypes = method.getParameterTypes();
            final List<Object> paramList = new ArrayList<>(paramTypes.length);
            for (int i = 0; i < paramTypes.length; ++i) {
                if (Boolean.class.isAssignableFrom(paramTypes[i])) {
                    paramList.add(arguments.getBoolean(i));
                } else if (Double.class.isAssignableFrom(paramTypes[i])) {
                    paramList.add(arguments.getNumber(i));
                } else if (String.class.isAssignableFrom(paramTypes[i])) {
                    paramList.add(arguments.getString(i));
                } else {
                    paramList.add(arguments.get(i));
                }
            }
            method.setAccessible(true);
            method.invoke(object, paramList.toArray());
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException(e);
        }
    }

}