com.haulmont.chile.core.model.utils.MethodsCache.java Source code

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Here is the source code for com.haulmont.chile.core.model.utils.MethodsCache.java

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/*
 * Copyright (c) 2008-2016 Haulmont.
 *
 * 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.haulmont.chile.core.model.utils;

import org.apache.commons.lang.StringUtils;

import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
import java.util.HashMap;

public class MethodsCache {

    private final transient Map<String, Method> getters = new HashMap<>();
    private final transient Map<String, Method> setters = new HashMap<>();

    public MethodsCache(Class clazz) {
        final Method[] methods = clazz.getMethods();
        for (Method method : methods) {
            String name = method.getName();
            if (name.startsWith("get") && method.getParameterTypes().length == 0) {
                name = StringUtils.uncapitalize(name.substring(3));
                method.setAccessible(true);
                getters.put(name, method);
            }
            if (name.startsWith("is") && method.getParameterTypes().length == 0) {
                name = StringUtils.uncapitalize(name.substring(2));
                method.setAccessible(true);
                getters.put(name, method);
            } else if (name.startsWith("set") && method.getParameterTypes().length == 1) {
                name = StringUtils.uncapitalize(name.substring(3));
                method.setAccessible(true);
                setters.put(name, method);
            }
        }
    }

    public void invokeSetter(Object object, String property, Object value) {
        final Method method = setters.get(property);
        if (method == null) {
            throw new IllegalArgumentException(
                    String.format("Can't find setter for property '%s' at %s", property, object.getClass()));
        }
        try {
            method.invoke(object, value);
        } catch (IllegalAccessException | InvocationTargetException e) {
            throw new RuntimeException(e);
        }
    }

    public Object invokeGetter(Object object, String property) {
        final Method method = getters.get(property);
        if (method == null) {
            throw new IllegalArgumentException(
                    String.format("Can't find getter for property '%s' at %s", property, object.getClass()));
        }
        try {
            return method.invoke(object);
        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
            throw new RuntimeException(e);
        }
    }
}