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Java example source code file (Resources.java)
The Resources.java Java example source code/* * Copyright (C) 2007 The Guava 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 * * 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 com.google.common.io; import static com.google.common.base.Preconditions.checkArgument; import static com.google.common.base.Preconditions.checkNotNull; import com.google.common.annotations.Beta; import com.google.common.annotations.GwtIncompatible; import com.google.common.base.Charsets; import com.google.common.base.MoreObjects; import com.google.common.collect.Lists; import com.google.errorprone.annotations.CanIgnoreReturnValue; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.URL; import java.nio.charset.Charset; import java.util.List; /** * Provides utility methods for working with resources in the classpath. Note that even though these * methods use {@link URL} parameters, they are usually not appropriate for HTTP or other * non-classpath resources. * * <p>All method parameters must be non-null unless documented otherwise. * * @author Chris Nokleberg * @author Ben Yu * @author Colin Decker * @since 1.0 */ @Beta @GwtIncompatible public final class Resources { private Resources() {} /** * Returns a {@link ByteSource} that reads from the given URL. * * @since 14.0 */ public static ByteSource asByteSource(URL url) { return new UrlByteSource(url); } /** * A byte source that reads from a URL using {@link URL#openStream()}. */ private static final class UrlByteSource extends ByteSource { private final URL url; private UrlByteSource(URL url) { this.url = checkNotNull(url); } @Override public InputStream openStream() throws IOException { return url.openStream(); } @Override public String toString() { return "Resources.asByteSource(" + url + ")"; } } /** * Returns a {@link CharSource} that reads from the given URL using the given character set. * * @since 14.0 */ public static CharSource asCharSource(URL url, Charset charset) { return asByteSource(url).asCharSource(charset); } /** * Reads all bytes from a URL into a byte array. * * @param url the URL to read from * @return a byte array containing all the bytes from the URL * @throws IOException if an I/O error occurs */ public static byte[] toByteArray(URL url) throws IOException { return asByteSource(url).read(); } /** * Reads all characters from a URL into a {@link String}, using the given character set. * * @param url the URL to read from * @param charset the charset used to decode the input stream; see {@link Charsets} for helpful * predefined constants * @return a string containing all the characters from the URL * @throws IOException if an I/O error occurs. */ public static String toString(URL url, Charset charset) throws IOException { return asCharSource(url, charset).read(); } /** * Streams lines from a URL, stopping when our callback returns false, or we have read all of the * lines. * * @param url the URL to read from * @param charset the charset used to decode the input stream; see {@link Charsets} for helpful * predefined constants * @param callback the LineProcessor to use to handle the lines * @return the output of processing the lines * @throws IOException if an I/O error occurs */ @CanIgnoreReturnValue // some processors won't return a useful result public static <T> T readLines(URL url, Charset charset, LineProcessor Other Java examples (source code examples)Here is a short list of links related to this Java Resources.java source code file: |
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