invoke the left Parameter and get the name property. - Android java.lang.reflect

Android examples for java.lang.reflect:Method Invoke

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Description

invoke the left Parameter and get the name property.

Demo Code


//package com.java2s;

import java.lang.reflect.Array;
import java.lang.reflect.Field;

import java.lang.reflect.Method;

import java.util.Map;

public class Main {
    /**/*from   w ww .  j  ava 2s .  com*/
     * invoke the leftParameter and get the name property.
     * it will try the Array.length() and Map.get(),
     * then it will try get'Name' and is'Name',
     * last, it will to find the name by invoke field.
     */
    public static Object searchProperty(Object leftParameter, String name)
            throws Exception {
        Class<?> leftClass = leftParameter.getClass();
        Object result;
        if (leftParameter.getClass().isArray() && "length".equals(name)) {
            result = Array.getLength(leftParameter);
        } else if (leftParameter instanceof Map) {
            result = ((Map<Object, Object>) leftParameter).get(name);
        } else {
            try {
                String getter = "get" + name.substring(0, 1).toUpperCase()
                        + name.substring(1);
                Method method = leftClass
                        .getMethod(getter, new Class<?>[0]);
                if (!method.isAccessible()) {
                    method.setAccessible(true);
                }
                result = method.invoke(leftParameter, new Object[0]);
            } catch (NoSuchMethodException e2) {
                try {
                    String getter = "is"
                            + name.substring(0, 1).toUpperCase()
                            + name.substring(1);
                    Method method = leftClass.getMethod(getter,
                            new Class<?>[0]);
                    if (!method.isAccessible()) {
                        method.setAccessible(true);
                    }
                    result = method.invoke(leftParameter, new Object[0]);
                } catch (NoSuchMethodException e3) {
                    Field field = leftClass.getField(name);
                    result = field.get(leftParameter);
                }
            }
        }
        return result;
    }
}

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