| /* |
| * Copyright 2008 Google Inc. |
| * |
| * 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.gwt.core.ext.linker.impl; |
| |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.UnableToCompleteException; |
| import com.google.gwt.core.ext.linker.PublicResource; |
| import com.google.gwt.dev.resource.Resource; |
| import com.google.gwt.dev.util.Util; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.io.Serializable; |
| |
| /** |
| * The standard implementation of {@link PublicResource}. |
| */ |
| public class StandardPublicResource extends PublicResource { |
| |
| /** |
| * Serializes a public resource via a snapshot of the content. |
| */ |
| private static final class SerializedPublicResource extends PublicResource { |
| private final byte[] data; |
| private final long lastModified; |
| |
| protected SerializedPublicResource(String partialPath, byte[] data, |
| long lastModified) { |
| super(StandardLinkerContext.class, partialPath); |
| this.data = data; |
| this.lastModified = lastModified; |
| } |
| |
| @Override |
| public InputStream getContents(TreeLogger logger) |
| throws UnableToCompleteException { |
| return new ByteArrayInputStream(data); |
| } |
| |
| @Override |
| public long getLastModified() { |
| return lastModified; |
| } |
| |
| @Override |
| public void writeTo(TreeLogger logger, OutputStream out) |
| throws UnableToCompleteException { |
| try { |
| out.write(data); |
| } catch (IOException e) { |
| logger.log(TreeLogger.ERROR, "Unable to write to stream", e); |
| throw new UnableToCompleteException(); |
| } |
| } |
| } |
| |
| private final Resource resource; |
| |
| public StandardPublicResource(String partialPath, Resource resource) { |
| super(StandardLinkerContext.class, partialPath); |
| this.resource = resource; |
| } |
| |
| @Override |
| public InputStream getContents(TreeLogger logger) |
| throws UnableToCompleteException { |
| return resource.openContents(); |
| } |
| |
| @Override |
| public long getLastModified() { |
| return resource.getLastModified(); |
| } |
| |
| private Object writeReplace() { |
| if (resource instanceof Serializable) { |
| return this; |
| } |
| // Resource is not serializable, must replace myself. |
| try { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| Util.copy(resource.openContents(), baos); |
| return new SerializedPublicResource(getPartialPath(), baos.toByteArray(), |
| getLastModified()); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |