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208
src/main/java/com/google/code/yanf4j/util/ResourcesUtils.java
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208
src/main/java/com/google/code/yanf4j/util/ResourcesUtils.java
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/**
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* Copyright [2008] [dennis zhuang] Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License. You may obtain a copy of the
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* License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed
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* to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
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* language governing permissions and limitations under the License
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*/
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package com.google.code.yanf4j.util;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.Reader;
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import java.net.URL;
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import java.util.Properties;
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/**
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* Resource utils
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*
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* @author dennis
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*
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*/
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public class ResourcesUtils extends Object {
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/** */
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/**
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* Returns the URL of the resource on the classpath
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*
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* @param resource The resource to find
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* @throws IOException If the resource cannot be found or read
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* @return The resource
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*/
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public static URL getResourceURL(String resource) throws IOException {
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URL url = null;
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ClassLoader loader = ResourcesUtils.class.getClassLoader();
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if (loader != null) {
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url = loader.getResource(resource);
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}
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if (url == null) {
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url = ClassLoader.getSystemResource(resource);
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}
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if (url == null) {
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throw new IOException("Could not find resource " + resource);
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}
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return url;
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}
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/** */
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/**
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* Returns the URL of the resource on the classpath
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*
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* @param loader The classloader used to load the resource
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* @param resource The resource to find
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* @throws IOException If the resource cannot be found or read
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* @return The resource
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*/
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public static URL getResourceURL(ClassLoader loader, String resource) throws IOException {
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URL url = null;
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if (loader != null) {
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url = loader.getResource(resource);
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}
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if (url == null) {
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url = ClassLoader.getSystemResource(resource);
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}
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if (url == null) {
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throw new IOException("Could not find resource " + resource);
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}
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return url;
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}
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/** */
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/**
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* Returns a resource on the classpath as a Stream object
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*
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* @param resource The resource to find
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* @throws IOException If the resource cannot be found or read
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* @return The resource
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*/
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public static InputStream getResourceAsStream(String resource) throws IOException {
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InputStream in = null;
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ClassLoader loader = ResourcesUtils.class.getClassLoader();
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if (loader != null) {
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in = loader.getResourceAsStream(resource);
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}
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if (in == null) {
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in = ClassLoader.getSystemResourceAsStream(resource);
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}
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if (in == null) {
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throw new IOException("Could not find resource " + resource);
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}
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return in;
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}
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/** */
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/**
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* Returns a resource on the classpath as a Stream object
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*
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* @param loader The classloader used to load the resource
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* @param resource The resource to find
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* @throws IOException If the resource cannot be found or read
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* @return The resource
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*/
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public static InputStream getResourceAsStream(ClassLoader loader, String resource)
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throws IOException {
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InputStream in = null;
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if (loader != null) {
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in = loader.getResourceAsStream(resource);
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}
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if (in == null) {
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in = ClassLoader.getSystemResourceAsStream(resource);
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}
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if (in == null) {
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throw new IOException("Could not find resource " + resource);
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}
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return in;
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}
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/** */
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/**
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* Returns a resource on the classpath as a Properties object
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*
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* @param resource The resource to find
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* @throws IOException If the resource cannot be found or read
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* @return The resource
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*/
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public static Properties getResourceAsProperties(String resource) throws IOException {
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Properties props = new Properties();
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InputStream in = null;
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String propfile = resource;
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in = getResourceAsStream(propfile);
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props.load(in);
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in.close();
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return props;
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}
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/** */
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/**
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* Returns a resource on the classpath as a Properties object
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*
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* @param loader The classloader used to load the resource
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* @param resource The resource to find
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* @throws IOException If the resource cannot be found or read
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* @return The resource
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*/
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public static Properties getResourceAsProperties(ClassLoader loader, String resource)
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throws IOException {
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Properties props = new Properties();
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InputStream in = null;
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String propfile = resource;
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in = getResourceAsStream(loader, propfile);
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props.load(in);
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in.close();
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return props;
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}
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/** */
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/**
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* Returns a resource on the classpath as a Reader object
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*
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* @param resource The resource to find
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* @throws IOException If the resource cannot be found or read
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* @return The resource
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*/
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public static InputStreamReader getResourceAsReader(String resource) throws IOException {
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return new InputStreamReader(getResourceAsStream(resource));
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}
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/** */
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/**
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* Returns a resource on the classpath as a Reader object
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*
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* @param loader The classloader used to load the resource
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* @param resource The resource to find
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* @throws IOException If the resource cannot be found or read
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* @return The resource
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*/
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public static Reader getResourceAsReader(ClassLoader loader, String resource) throws IOException {
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return new InputStreamReader(getResourceAsStream(loader, resource));
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}
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/** */
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/**
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* Returns a resource on the classpath as a File object
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*
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* @param resource The resource to find
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* @throws IOException If the resource cannot be found or read
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* @return The resource
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*/
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public static File getResourceAsFile(String resource) throws IOException {
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return new File(getResourceURL(resource).getFile());
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}
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/** */
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/**
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* Returns a resource on the classpath as a File object
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*
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* @param loader The classloader used to load the resource
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* @param resource The resource to find
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* @throws IOException If the resource cannot be found or read
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* @return The resource
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*/
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public static File getResourceAsFile(ClassLoader loader, String resource) throws IOException {
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return new File(getResourceURL(loader, resource).getFile());
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}
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}
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