spring ResourceBundleEditor 源码

spring ResourceBundleEditor 代码

文件路径：/spring-beans/src/main/java/org/springframework/beans/propertyeditors/ResourceBundleEditor.java

/*
 * Copyright 2002-2017 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.beans.propertyeditors;

import java.beans.PropertyEditorSupport;
import java.util.Locale;
import java.util.ResourceBundle;

import org.springframework.util.Assert;
import org.springframework.util.StringUtils;

/**
 * {@link java.beans.PropertyEditor} implementation for standard JDK
 * {@link java.util.ResourceBundle ResourceBundles}.
 *
 * <p>Only supports conversion <i>from</i> a String, but not <i>to</i> a String.
 *
 * Find below some examples of using this class in a (properly configured)
 * Spring container using XML-based metadata:
 *
 * <pre class="code"> &lt;bean id="errorDialog" class="..."&gt;
 *    &lt;!--
 *        the 'messages' property is of type java.util.ResourceBundle.
 *        the 'DialogMessages.properties' file exists at the root of the CLASSPATH
 *    --&gt;
 *    &lt;property name="messages" value="DialogMessages"/&gt;
 * &lt;/bean&gt;</pre>
 *
 * <pre class="code"> &lt;bean id="errorDialog" class="..."&gt;
 *    &lt;!--
 *        the 'DialogMessages.properties' file exists in the 'com/messages' package
 *    --&gt;
 *    &lt;property name="messages" value="com/messages/DialogMessages"/&gt;
 * &lt;/bean&gt;</pre>
 *
 * <p>A 'properly configured' Spring {@link org.springframework.context.ApplicationContext container}
 * might contain a {@link org.springframework.beans.factory.config.CustomEditorConfigurer}
 * definition such that the conversion can be effected transparently:
 *
 * <pre class="code"> &lt;bean class="org.springframework.beans.factory.config.CustomEditorConfigurer"&gt;
 *    &lt;property name="customEditors"&gt;
 *        &lt;map&gt;
 *            &lt;entry key="java.util.ResourceBundle"&gt;
 *                &lt;bean class="org.springframework.beans.propertyeditors.ResourceBundleEditor"/&gt;
 *            &lt;/entry&gt;
 *        &lt;/map&gt;
 *    &lt;/property&gt;
 * &lt;/bean&gt;</pre>
 *
 * <p>Please note that this {@link java.beans.PropertyEditor} is <b>not</b>
 * registered by default with any of the Spring infrastructure.
 *
 * <p>Thanks to David Leal Valmana for the suggestion and initial prototype.
 *
 * @author Rick Evans
 * @author Juergen Hoeller
 * @since 2.0
 */
public class ResourceBundleEditor extends PropertyEditorSupport {

	/**
	 * The separator used to distinguish between the base name and the locale
	 * (if any) when {@link #setAsText(String) converting from a String}.
	 */
	public static final String BASE_NAME_SEPARATOR = "_";


	@Override
	public void setAsText(String text) throws IllegalArgumentException {
		Assert.hasText(text, "'text' must not be empty");
		String name = text.trim();

		int separator = name.indexOf(BASE_NAME_SEPARATOR);
		if (separator == -1) {
			setValue(ResourceBundle.getBundle(name));
		}
		else {
			// The name potentially contains locale information
			String baseName = name.substring(0, separator);
			if (!StringUtils.hasText(baseName)) {
				throw new IllegalArgumentException("Invalid ResourceBundle name: '" + text + "'");
			}
			String localeString = name.substring(separator + 1);
			Locale locale = StringUtils.parseLocaleString(localeString);
			setValue(locale != null ? ResourceBundle.getBundle(baseName, locale) : ResourceBundle.getBundle(baseName));
		}
	}

}

相关信息

spring 源码目录

相关文章

spring ByteArrayPropertyEditor 源码

spring CharArrayPropertyEditor 源码

spring CharacterEditor 源码

spring CharsetEditor 源码

spring ClassArrayEditor 源码

spring ClassEditor 源码

spring CurrencyEditor 源码

spring CustomBooleanEditor 源码

spring CustomCollectionEditor 源码

spring CustomDateEditor 源码