diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/ContentTransformingResource.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/ContentTransformingResource.java | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/ContentTransformingResource.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/ContentTransformingResource.java deleted file mode 100644 index 79445bfd..00000000 --- a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/ContentTransformingResource.java +++ /dev/null @@ -1,177 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You 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.tools.ant.types.resources; - -import java.io.IOException; -import java.io.InputStream; -import java.io.OutputStream; - -import org.apache.tools.ant.BuildException; -import org.apache.tools.ant.types.ResourceCollection; -import org.apache.tools.ant.util.FileUtils; - -/** - * A resource that transforms the content of another resource. - * - * <p>Wraps around another resource, delegates all queries (except - * getSize) to that other resource but transforms stream content - * on the fly.</p> - * - * @since Ant 1.8 - */ -public abstract class ContentTransformingResource extends ResourceDecorator { - - private static final int BUFFER_SIZE = 8192; - - /** no arg constructor */ - protected ContentTransformingResource() { - } - - /** - * Constructor with another resource to wrap. - * @param other the resource to wrap. - */ - protected ContentTransformingResource(final ResourceCollection other) { - super(other); - } - - /** - * Get the size of this Resource. - * @return the size, as a long, 0 if the Resource does not exist (for - * compatibility with java.io.File), or UNKNOWN_SIZE if not known. - */ - @Override - public long getSize() { - if (isExists()) { - InputStream in = null; - try { - in = getInputStream(); - final byte[] buf = new byte[BUFFER_SIZE]; - int size = 0; - int readNow; - while ((readNow = in.read(buf, 0, buf.length)) > 0) { - size += readNow; - } - return size; - } catch (final IOException ex) { - throw new BuildException("caught exception while reading " - + getName(), ex); - } finally { - FileUtils.close(in); - } - } else { - return 0; - } - } - - /** - * Get an InputStream for the Resource. - * @return an InputStream containing this Resource's content. - * @throws IOException if unable to provide the content of this - * Resource as a stream. - * @throws UnsupportedOperationException if InputStreams are not - * supported for this Resource type. - */ - @Override - public InputStream getInputStream() throws IOException { - InputStream in = getResource().getInputStream(); - if (in != null) { - in = wrapStream(in); - } - return in; - } - - /** - * Get an OutputStream for the Resource. - * @return an OutputStream to which content can be written. - * @throws IOException if unable to provide the content of this - * Resource as a stream. - * @throws UnsupportedOperationException if OutputStreams are not - * supported for this Resource type. - */ - @Override - public OutputStream getOutputStream() throws IOException { - OutputStream out = getResource().getOutputStream(); - if (out != null) { - out = wrapStream(out); - } - return out; - } - - /** - * Suppress FileProvider, re-implement Appendable - */ - @Override - public <T> T as(final Class<T> clazz) { - if (Appendable.class.isAssignableFrom(clazz)) { - if (isAppendSupported()) { - final Appendable a = - getResource().as(Appendable.class); - if (a != null) { - return clazz.cast(new Appendable() { - public OutputStream getAppendOutputStream() - throws IOException { - OutputStream out = a.getAppendOutputStream(); - if (out != null) { - out = wrapStream(out); - } - return out; - } - }); - } - } - return null; - } - - return FileProvider.class.isAssignableFrom(clazz) - ? null : getResource().as(clazz); - } - - /** - * Learn whether the transformation performed allows appends. - * - * <p>In general compressed outputs will become invalid if they - * are appended to, for example.</p> - * - * <p>This implementations returns false.</p> - */ - protected boolean isAppendSupported() { - return false; - } - - /** - * Get a content-filtering/transforming InputStream. - * - * @param in InputStream to wrap, will never be null. - * @return a compressed inputstream. - * @throws IOException if there is a problem. - */ - protected abstract InputStream wrapStream(InputStream in) - throws IOException; - - /** - * Get a content-filtering/transforming OutputStream. - * - * @param out OutputStream to wrap, will never be null. - * @return a compressed outputstream. - * @throws IOException if there is a problem. - */ - protected abstract OutputStream wrapStream(OutputStream out) - throws IOException; - -} |