get Setter Method - Android java.lang.reflect

Android examples for java.lang.reflect:Method Getter Setter

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Description

get Setter Method

Demo Code


//package com.java2s;
import java.lang.reflect.Field;

import java.lang.reflect.Method;

import java.util.WeakHashMap;
import android.text.TextUtils;

public class Main {
    private static final WeakHashMap<Field, Method> setterCache = new WeakHashMap<Field, Method>();

    public static Method getSetter(Field field) {
        String fieldName = field.getName();
        Method setter = (Method) setterCache.get(field);
        if (setter != null) {
            return setter;
        }/*from w w w . ja v a 2 s .c  om*/
        String methodName = generateSetterName(fieldName);
        Class<?> clazz = field.getDeclaringClass();
        try {
            setter = clazz.getMethod(methodName,
                    new Class[] { field.getType() });
            setterCache.put(field, setter);
            return setter;
        } catch (SecurityException e) {
            return null;
        } catch (NoSuchMethodException e) {
        }
        return null;
    }

    public static String generateSetterName(String fieldName) {
        if (TextUtils.isEmpty(fieldName)) {
            throw new IllegalArgumentException("invalid field.");
        }
        String firstCH = fieldName.substring(0);
        Character secondCH = null;
        if (fieldName.length() > 1) {
            secondCH = Character.valueOf(fieldName.charAt(1));
        }
        String setterName = null;
        if ((secondCH == null)
                || (!Character.isUpperCase(secondCH.charValue()))) {
            setterName = "set"
                    + fieldName
                            .replaceFirst(firstCH, firstCH.toUpperCase());
        } else {
            setterName = "set" + fieldName;
        }
        return setterName;
    }
}

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