Find the object getter method for the given property. - Java Reflection

Java examples for Reflection:Getter

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Description

Find the object getter method for the given property.

Demo Code


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

public class Main {
    /**//from   w  ww  . j  a va  2s .c  o m
     * Find the object getter method for the given property.
     * <p/>
     * If this method cannot find a 'get' property it tries to lookup an 'is'
     * property.
     *
     * @param object the object to find the getter method on
     * @param property the getter property name specifying the getter to lookup
     * @param path the full expression path (used for logging purposes)
     * @return the getter method
     */
    public final static Method findGetter(Object object, String property,
            String path) {

        // Find the getter for property
        String getterName = toGetterName(property);

        Method method = null;
        Class sourceClass = object.getClass();

        try {
            method = sourceClass.getMethod(getterName, (Class[]) null);
        } catch (Exception e) {
        }

        if (method == null) {
            String isGetterName = toIsGetterName(property);
            try {
                method = sourceClass
                        .getMethod(isGetterName, (Class[]) null);
            } catch (Exception e) {
                StringBuilder buffer = new StringBuilder();
                buffer.append("Result: neither getter methods '");
                buffer.append(getterName).append("()' nor '");
                buffer.append(isGetterName).append(
                        "()' was found on class: '");
                buffer.append(object.getClass().getName()).append("'.");
                throw new RuntimeException(buffer.toString(), e);
            }
        }
        return method;
    }

    /**
     * Return the getter method name for the given property name.
     *
     * @param property the property name
     * @return the getter method name for the given property name.
     */
    public static String toGetterName(String property) {
        StringBuilder buffer = new StringBuilder(property.length() + 3);

        buffer.append("get");
        buffer.append(Character.toUpperCase(property.charAt(0)));
        buffer.append(property.substring(1));

        return buffer.toString();
    }

    /**
     * Return the is getter method name for the given property name.
     *
     * @param property the property name
     * @return the is getter method name for the given property name.
     */
    public static String toIsGetterName(String property) {
        StringBuilder buffer = new StringBuilder(property.length() + 3);

        buffer.append("is");
        buffer.append(Character.toUpperCase(property.charAt(0)));
        buffer.append(property.substring(1));

        return buffer.toString();
    }
}

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