Example usage for java.lang Class getMethod

Introduction

In this page you can find the example usage for java.lang Class getMethod.

Prototype

@CallerSensitive
public Method getMethod(String name, Class<?>... parameterTypes)
        throws NoSuchMethodException, SecurityException 

Source Link

Document

Returns a Method object that reflects the specified public member method of the class or interface represented by this Class object.

Usage

From source file:ReflectUtils.java

private static synchronized Method findMethod(Object obj, String property, Object value) {
    Method m = null;/*from  w  ww.  jav  a2s. c o m*/
    Class<?> theClass = obj.getClass();
    String setter = String.format("set%C%s", property.charAt(0), property.substring(1));
    Class paramType = value.getClass();
    while (paramType != null) {
        try {
            m = theClass.getMethod(setter, paramType);
            return m;
        } catch (NoSuchMethodException ex) {
            // try on the interfaces of this class
            for (Class iface : paramType.getInterfaces()) {
                try {
                    m = theClass.getMethod(setter, iface);
                    return m;
                } catch (NoSuchMethodException ex1) {
                }
            }
            paramType = paramType.getSuperclass();
        }
    }
    return m;
}

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From source file:com.github.riking.dropcontrol.ItemStringInterpreter.java

public static BasicItemMatcher valueOf(String itemString) throws IllegalArgumentException {
    itemString = itemString.toUpperCase();
    if (itemString.equals("ANY")) {
        return new BasicItemMatcher(null, null, null);
    }/*from   ww w. j  a va 2 s . com*/
    String[] split = itemString.split(":");
    Validate.isTrue(split.length <= 2,
            "Unable to parse item string - too many colons (maximum 1). Please correct the format and reload the config. Input: "
                    + itemString);
    Material mat = getMaterial(split[0]);
    Validate.notNull(mat,
            "Unable to parse item string - unrecognized material. Please correct the format and reload the config. Input: "
                    + itemString);
    if (split.length == 1) {
        return new BasicItemMatcher(mat, null, null);
    }
    String dataString = split[1];
    short data;
    try {
        data = Short.parseShort(dataString);
        return new BasicItemMatcher(mat, data, null); // the datastring is not passed if it was just a number
    } catch (NumberFormatException ignored) {
    }
    if (materialData.containsKey(mat.getData())) {
        Class<? extends MaterialData> matClass = mat.getData();
        Class<? extends Enum> enumClass = materialData.get(mat.getData());
        Enum enumValue;
        try {
            enumValue = (Enum) enumClass.getMethod("valueOf", String.class).invoke(null, dataString);
        } catch (InvocationTargetException e) {
            throw new IllegalArgumentException("Unable to parse item string - " + dataString
                    + " is not a valid member of " + enumClass.getSimpleName(), e.getCause());
        } catch (Exception rethrow) {
            throw new RuntimeException("Unexpected exception when parsing item string", rethrow);
        }
        MaterialData matData;
        try {
            matData = matClass.getConstructor(enumClass).newInstance(enumValue);
        } catch (Exception rethrow) {
            throw new RuntimeException("Unexpected exception when parsing item string", rethrow);
        }
        data = (short) matData.getData();
        return new BasicItemMatcher(mat, data, dataString);
    }
    if (workarounds.containsKey(mat)) {
        StringInterpreter interp = workarounds.get(mat);
        data = interp.interpret(dataString);
        return new BasicItemMatcher(mat, data, dataString);
    }
    throw new IllegalArgumentException(
            "Unable to parse item string - I don't know how to parse a word-data for " + mat);
}

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From source file:com.palantir.ptoss.util.Reflections.java

/**
 * Looks up an {@link Enum} value by its {@link String} name.
 * @param enumType {@link Enum} class to query.
 * @param value {@link String} name for the {@link Enum} value.
 * @return the actual {@link Enum} value specified by the passed name.
 * @see Enum#valueOf(Class, String)// w ww.j  a  v  a2  s.c o  m
 */
public static Object evalEnum(Class<?> enumType, String value) {
    try {
        Method method = enumType.getMethod("valueOf", String.class);
        method.setAccessible(true);
        return method.invoke(null, value);
    } catch (Exception ew) {
        throw new IllegalArgumentException("could not find enum value: " + value);
    }
}

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From source file:com.baasbox.configuration.PropertiesConfigurationHelper.java

public static void override(String completeKey, Object value) throws ConfigurationException {
    Object enumValue = findByKey(completeKey);
    try {/* w ww .  j  a va  2 s. c o  m*/
        String[] splittedKeys = completeKey.split("\\.");
        String section = splittedKeys[0];
        Class en = PropertiesConfigurationHelper.CONFIGURATION_SECTIONS.get(section);
        en.getMethod("override", Object.class).invoke(enumValue, value);
    } catch (Exception e) {
        throw new ConfigurationException("Invalid key -" + completeKey + "- or value -" + value + "-", e);
    }
}

---

From source file:hm.binkley.util.XPropsConverter.java

@SuppressWarnings("unchecked")
private static <T, E extends Exception> Conversion<T, E> invokeValueOf(final Class<T> token)
        throws NoSuchMethodError {
    try {//from   w w w  .j ava  2  s . com
        final Method method = token.getMethod("valueOf", String.class);
        return value -> {
            try {
                return (T) method.invoke(null, value);
            } catch (final IllegalAccessException e) {
                final IllegalAccessError x = new IllegalAccessError(e.getMessage());
                x.setStackTrace(e.getStackTrace());
                throw x;
            } catch (final InvocationTargetException e) {
                final Throwable root = getRootCause(e);
                final RuntimeException x = new RuntimeException(root);
                x.setStackTrace(root.getStackTrace());
                throw x;
            }
        };
    } catch (final NoSuchMethodException ignored) {
        return null;
    }
}

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From source file:hm.binkley.util.XPropsConverter.java

@SuppressWarnings("unchecked")
private static <T, E extends Exception> Conversion<T, E> invokeOf(final Class<T> token)
        throws NoSuchMethodError {
    try {/*w  ww .  j a  va2  s. co m*/
        final Method method = token.getMethod("of", String.class);
        return value -> {
            try {
                return (T) method.invoke(null, value);
            } catch (final IllegalAccessException e) {
                final IllegalAccessError x = new IllegalAccessError(e.getMessage());
                x.setStackTrace(e.getStackTrace());
                throw x;
            } catch (final InvocationTargetException e) {
                final Throwable root = getRootCause(e);
                final RuntimeException x = new RuntimeException(root);
                x.setStackTrace(root.getStackTrace());
                throw x;
            }
        };
    } catch (final NoSuchMethodException ignored) {
        return null;
    }
}

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From source file:com.baasbox.configuration.PropertiesConfigurationHelper.java

public static void setVisible(String completeKey, Boolean value) throws ConfigurationException {
    Object enumValue = findByKey(completeKey);
    try {/*from www  . j  av a 2 s .  c  o  m*/
        String[] splittedKeys = completeKey.split("\\.");
        String section = splittedKeys[0];
        Class en = PropertiesConfigurationHelper.CONFIGURATION_SECTIONS.get(section);
        en.getMethod("setVisible", boolean.class).invoke(enumValue, value);
    } catch (Exception e) {
        BaasBoxLogger.error("Invalid key -" + completeKey + "- or value -" + value + "-", e);
        throw new ConfigurationException("Invalid key -" + completeKey + "- or value -" + value + "-", e);
    }
}

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From source file:com.baasbox.configuration.PropertiesConfigurationHelper.java

public static void setEditable(String completeKey, Boolean value) throws ConfigurationException {
    Object enumValue = findByKey(completeKey);
    try {/*  w  ww  .j  a  v a2s  .c o m*/
        String[] splittedKeys = completeKey.split("\\.");
        String section = splittedKeys[0];
        Class en = PropertiesConfigurationHelper.CONFIGURATION_SECTIONS.get(section);
        en.getMethod("setEditable", boolean.class).invoke(enumValue, value);
    } catch (Exception e) {
        BaasBoxLogger.error("Invalid key -" + completeKey + "- or value -" + value + "-", e);
        throw new ConfigurationException("Invalid key -" + completeKey + "- or value -" + value + "-", e);
    }
}

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From source file:Main.java

/**
 * Returns attribute's getter method. If the method not found then
 * NoSuchMethodException will be thrown.
 * //  w  ww .  j  a  v a 2s  .  co m
 * @param cls
 *          the class the attribute belongs too
 * @param attr
 *          the attribute's name
 * @return attribute's getter method
 * @throws NoSuchMethodException
 *           if the getter was not found
 */
public final static Method getAttributeGetter(Class cls, String attr) throws NoSuchMethodException {
    StringBuffer buf = new StringBuffer(attr.length() + 3);
    buf.append("get");
    if (Character.isLowerCase(attr.charAt(0))) {
        buf.append(Character.toUpperCase(attr.charAt(0))).append(attr.substring(1));
    } else {
        buf.append(attr);
    }

    try {
        return cls.getMethod(buf.toString(), (Class[]) null);
    } catch (NoSuchMethodException e) {
        buf.replace(0, 3, "is");
        return cls.getMethod(buf.toString(), (Class[]) null);
    }
}

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From source file:io.openmessaging.rocketmq.utils.BeanUtils.java

public static void setProperties(Class<?> clazz, Object obj, String methodName, Object value)
        throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
    Class<?> parameterClass = getMethodClass(clazz, methodName);
    Method setterMethod = clazz.getMethod(methodName, parameterClass);
    if (parameterClass == Boolean.TYPE) {
        setterMethod.invoke(obj, Boolean.valueOf(value.toString()));
    } else if (parameterClass == Integer.TYPE) {
        setterMethod.invoke(obj, Integer.valueOf(value.toString()));
    } else if (parameterClass == Double.TYPE) {
        setterMethod.invoke(obj, Double.valueOf(value.toString()));
    } else if (parameterClass == Float.TYPE) {
        setterMethod.invoke(obj, Float.valueOf(value.toString()));
    } else if (parameterClass == Long.TYPE) {
        setterMethod.invoke(obj, Long.valueOf(value.toString()));
    } else//from ww w  .ja  va  2  s .  c o  m
        setterMethod.invoke(obj, value);
}

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