localebeanutilsbean.java

JAVA 文章管理系统源码

/*
 * Copyright 2001-2004 The Apache Software Foundation.
 * 
 * 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 org.apache.commons.beanutils.locale;


import org.apache.commons.beanutils.*;
import org.apache.commons.beanutils.ContextClassLoaderLocal;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.beans.IndexedPropertyDescriptor;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.util.Locale;


/**
 * <p>Utility methods for populating JavaBeans properties
 * via reflection in a locale-dependent manner.</p>
 *
 * @author Craig R. McClanahan
 * @author Ralph Schaer
 * @author Chris Audley
 * @author Rey Fran鏾is
 * @author Gregor Ra齧an
 * @author Yauheny Mikulski
 * @since 1.7
 */

public class LocaleBeanUtilsBean extends BeanUtilsBean {

	/** 
	 * Contains <code>LocaleBeanUtilsBean</code> instances indexed by context classloader.
	 */
    private static final ContextClassLoaderLocal 
            localeBeansByClassLoader = new ContextClassLoaderLocal() {
                        // Creates the default instance used when the context classloader is unavailable
                        protected Object initialValue() {
                            return new LocaleBeanUtilsBean();
                        }
                    };
     
     /** Gets singleton instance */
     public synchronized static LocaleBeanUtilsBean getLocaleBeanUtilsInstance() {
        return (LocaleBeanUtilsBean)localeBeansByClassLoader.get();
     }
 
	/** 
	 * Sets the instance which provides the functionality for {@link LocaleBeanUtils}.
	 * This is a pseudo-singleton - an single instance is provided per (thread) context classloader.
	 * This mechanism provides isolation for web apps deployed in the same container. 
	 */
	public synchronized static void setInstance(LocaleBeanUtilsBean newInstance) {
        localeBeansByClassLoader.set(newInstance);
	}

    /** All logging goes through this logger */
    private static Log log = LogFactory.getLog(LocaleBeanUtilsBean.class);

    // ----------------------------------------------------- Instance Variables
        
    /** Convertor used by this class */
    private LocaleConvertUtilsBean localeConvertUtils;
    
    // --------------------------------------------------------- Constructors
    
    /** Construct instance with standard conversion bean */
    public LocaleBeanUtilsBean() {
        this.localeConvertUtils = new LocaleConvertUtilsBean();
    }
    
    /** 
     * Construct instance that uses given locale conversion
     *
     * @param localeConvertUtils use this <code>localeConvertUtils</code> to perform
     * conversions
     * @param convertUtilsBean use this for standard conversions
     * @param propertyUtilsBean use this for property conversions
     */
    public LocaleBeanUtilsBean(
                            LocaleConvertUtilsBean localeConvertUtils,
                            ConvertUtilsBean convertUtilsBean,
                            PropertyUtilsBean propertyUtilsBean) {
        super(convertUtilsBean, propertyUtilsBean);
        this.localeConvertUtils = localeConvertUtils;
    }
    
    /** 
     * Construct instance that uses given locale conversion
     *
     * @param localeConvertUtils use this <code>localeConvertUtils</code> to perform
     * conversions
     */
    public LocaleBeanUtilsBean(LocaleConvertUtilsBean localeConvertUtils) {
        this.localeConvertUtils = localeConvertUtils;
    }
    
    // --------------------------------------------------------- Public Methods
    
    /** Gets the bean instance used for conversions */
    public LocaleConvertUtilsBean getLocaleConvertUtils() {
        return localeConvertUtils;
    }
    
    /**
     * Gets the default Locale
     */
    public Locale getDefaultLocale() {

        return getLocaleConvertUtils().getDefaultLocale();
    }


    /**
     * Sets the default Locale
     */
    public void setDefaultLocale(Locale locale) {

        getLocaleConvertUtils().setDefaultLocale(locale);
    }

    /**
     * Is the pattern to be applied localized
     * (Indicate whether the pattern is localized or not)
     */
    public boolean getApplyLocalized() {

        return getLocaleConvertUtils().getApplyLocalized();
    }

    /**
     * Sets whether the pattern is applied localized
     * (Indicate whether the pattern is localized or not)
     */
    public void setApplyLocalized(boolean newApplyLocalized) {

        getLocaleConvertUtils().setApplyLocalized(newApplyLocalized);
    }


    // --------------------------------------------------------- Public Methods

    /**
     * Return the value of the specified locale-sensitive indexed property
     * of the specified bean, as a String. The zero-relative index of the
     * required value must be included (in square brackets) as a suffix to
     * the property name, or <code>IllegalArgumentException</code> will be
     * thrown.
     *
     * @param bean Bean whose property is to be extracted
     * @param name <code>propertyname[index]</code> of the property value
     *  to be extracted
     * @param pattern The convertion pattern
     *
     * @exception IllegalAccessException if the caller does not have
     *  access to the property accessor method
     * @exception InvocationTargetException if the property accessor method
     *  throws an exception
     * @exception NoSuchMethodException if an accessor method for this
     *  propety cannot be found
     */
    public String getIndexedProperty(
                                    Object bean, 
                                    String name, 
                                    String pattern)
                                        throws 
                                            IllegalAccessException, 
                                            InvocationTargetException,
                                            NoSuchMethodException {

        Object value = getPropertyUtils().getIndexedProperty(bean, name);
        return getLocaleConvertUtils().convert(value, pattern);
    }

    /**
     * Return the value of the specified locale-sensitive indexed property
     * of the specified bean, as a String using the default convertion pattern of
     * the corresponding {@link LocaleConverter}. The zero-relative index
     * of the required value must be included (in square brackets) as a suffix
     * to the property name, or <code>IllegalArgumentException</code> will be thrown.
     *
     * @param bean Bean whose property is to be extracted
     * @param name <code>propertyname[index]</code> of the property value
     *  to be extracted
     *
     * @exception IllegalAccessException if the caller does not have
     *  access to the property accessor method
     * @exception InvocationTargetException if the property accessor method
     *  throws an exception
     * @exception NoSuchMethodException if an accessor method for this
     *  propety cannot be found
     */
    public String getIndexedProperty(
                                    Object bean, 
                                    String name)
                                        throws 
                                            IllegalAccessException, 
                                            InvocationTargetException,
                                            NoSuchMethodException {

        return getIndexedProperty(bean, name, null);
    }

    /**
     * Return the value of the specified locale-sensetive indexed property
     * of the specified bean, as a String using the specified convertion pattern.
     * The index is specified as a method parameter and
     * must *not* be included in the property name expression
     *
     * @param bean Bean whose property is to be extracted
     * @param name Simple property name of the property value to be extracted
     * @param index Index of the property value to be extracted
     * @param pattern The convertion pattern
     *
     * @exception IllegalAccessException if the caller does not have
     *  access to the property accessor method
     * @exception InvocationTargetException if the property accessor method
     *  throws an exception
     * @exception NoSuchMethodException if an accessor method for this
     *  propety cannot be found
     */
    public String getIndexedProperty(Object bean,
                                            String name, int index, String pattern)
            throws IllegalAccessException, InvocationTargetException,
            NoSuchMethodException {

        Object value = getPropertyUtils().getIndexedProperty(bean, name, index);
        return getLocaleConvertUtils().convert(value, pattern);
    }

    /**
     * Return the value of the specified locale-sensetive indexed property
     * of the specified bean, as a String using the default convertion pattern of
     * the corresponding {@link LocaleConverter}.
     * The index is specified as a method parameter and
     * must *not* be included in the property name expression
     *
     * @param bean Bean whose property is to be extracted
     * @param name Simple property name of the property value to be extracted
     * @param index Index of the property value to be extracted
     *
     * @exception IllegalAccessException if the caller does not have
     *  access to the property accessor method
     * @exception InvocationTargetException if the property accessor method
     *  throws an exception
     * @exception NoSuchMethodException if an accessor method for this
     *  propety cannot be found
     */
    public String getIndexedProperty(Object bean,
                                            String name, int index)
            throws IllegalAccessException, InvocationTargetException,
            NoSuchMethodException {
        return getIndexedProperty(bean, name, index, null);
    }

    /**
     * Return the value of the specified simple locale-sensitive property
     * of the specified bean, converted to a String using the specified
     * convertion pattern.
     *
     * @param bean Bean whose property is to be extracted
     * @param name Name of the property to be extracted
     * @param pattern The convertion pattern
     *
     * @exception IllegalAccessException if the caller does not have
     *  access to the property accessor method
     * @exception InvocationTargetException if the property accessor method
     *  throws an exception
     * @exception NoSuchMethodException if an accessor method for this
     *  propety cannot be found
     */
    public String getSimpleProperty(Object bean, String name, String pattern)
            throws IllegalAccessException, InvocationTargetException,
            NoSuchMethodException {

        Object value = getPropertyUtils().getSimpleProperty(bean, name);
        return getLocaleConvertUtils().convert(value, pattern);
    }

    /**
     * Return the value of the specified simple locale-sensitive property
     * of the specified bean, converted to a String using the default
     * convertion pattern of the corresponding {@link LocaleConverter}.
     *
     * @param bean Bean whose property is to be extracted
     * @param name Name of the property to be extracted
     *
     * @exception IllegalAccessException if the caller does not have
     *  access to the property accessor method
     * @exception InvocationTargetException if the property accessor method
     *  throws an exception
     * @exception NoSuchMethodException if an accessor method for this
     *  propety cannot be found
     */
    public String getSimpleProperty(Object bean, String name)
            throws IllegalAccessException, InvocationTargetException,
            NoSuchMethodException {

        return getSimpleProperty(bean, name, null);
    }

    /**
     * Return the value of the specified mapped locale-sensitive property
     * of the specified bean, as a String using the specified convertion pattern.
     * The key is specified as a method parameter and must *not* be included in
     * the property name expression.