| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "Ant" and "Apache Software |
| * Foundation" must not be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.tools.ant.filters; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.File; |
| import java.io.BufferedReader; |
| import java.io.FileReader; |
| import org.apache.tools.ant.types.Parameter; |
| |
| /** |
| * Concats a file before and/or after the file. |
| * |
| * <p>Example:<pre> |
| * <copy todir="build"> |
| * <fileset dir="src" includes="*.java"/> |
| * <filterchain> |
| * <concatfilter prepend="apache-license-java.txt"/> |
| * </filterchain> |
| * </copy> |
| * </pre> |
| * Copies all java sources from <i>src</i> to <i>build</i> and adds the |
| * content of <i>apache-license-java.txt</i> add the beginning of each |
| * file.</p> |
| * |
| * @since 1.6 |
| * @version 2003-09-23 |
| * @author Jan Mat\u00e8rne |
| */ |
| public final class ConcatFilter extends BaseParamFilterReader |
| implements ChainableReader { |
| |
| /** File to add before the content. */ |
| private File prepend; |
| |
| /** File to add after the content. */ |
| private File append; |
| |
| /** Reader for prepend-file. */ |
| private Reader prependReader = null; |
| |
| /** Reader for append-file. */ |
| private Reader appendReader = null; |
| |
| /** |
| * Constructor for "dummy" instances. |
| * |
| * @see BaseFilterReader#BaseFilterReader() |
| */ |
| public ConcatFilter() { |
| super(); |
| } |
| |
| /** |
| * Creates a new filtered reader. |
| * |
| * @param in A Reader object providing the underlying stream. |
| * Must not be <code>null</code>. |
| */ |
| public ConcatFilter(final Reader in) { |
| super(in); |
| } |
| |
| /** |
| * Returns the next character in the filtered stream. If the desired |
| * number of lines have already been read, the resulting stream is |
| * effectively at an end. Otherwise, the next character from the |
| * underlying stream is read and returned. |
| * |
| * @return the next character in the resulting stream, or -1 |
| * if the end of the resulting stream has been reached |
| * |
| * @exception IOException if the underlying stream throws an IOException |
| * during reading |
| */ |
| public int read() throws IOException { |
| // do the "singleton" initialization |
| if (!getInitialized()) { |
| initialize(); |
| setInitialized(true); |
| } |
| |
| int ch = -1; |
| |
| // The readers return -1 if they end. So simply read the "prepend" |
| // after that the "content" and at the end the "append" file. |
| if (prependReader != null) { |
| ch = prependReader.read(); |
| if (ch == -1) { |
| // I am the only one so I have to close the reader |
| prependReader.close(); |
| prependReader = null; |
| } |
| } |
| if (ch == -1) { |
| ch = super.read(); |
| } |
| if (ch == -1) { |
| // don´t call super.close() because that reader is used |
| // on other places ... |
| if (appendReader != null) { |
| ch = appendReader.read(); |
| if (ch == -1) { |
| // I am the only one so I have to close the reader |
| appendReader.close(); |
| appendReader = null; |
| } |
| } |
| } |
| |
| return ch; |
| } |
| |
| /** |
| * Sets <i>prepend</i> attribute. |
| * @param prepend new value |
| */ |
| public void setPrepend(final File prepend) { |
| this.prepend = prepend; |
| } |
| |
| /** |
| * Returns <i>prepend</i> attribute. |
| * @return prepend attribute |
| */ |
| public File getPrepend() { |
| return prepend; |
| } |
| |
| /** |
| * Sets <i>append</i> attribute. |
| * @param append new value |
| */ |
| public void setAppend(final File append) { |
| this.append = append; |
| } |
| |
| /** |
| * Returns <i>append</i> attribute. |
| * @return append attribute |
| */ |
| public File getAppend() { |
| return append; |
| } |
| |
| /** |
| * Creates a new ConcatReader using the passed in |
| * Reader for instantiation. |
| * |
| * @param rdr A Reader object providing the underlying stream. |
| * Must not be <code>null</code>. |
| * |
| * @return a new filter based on this configuration, but filtering |
| * the specified reader |
| */ |
| public Reader chain(final Reader rdr) { |
| ConcatFilter newFilter = new ConcatFilter(rdr); |
| newFilter.setPrepend(getPrepend()); |
| newFilter.setAppend(getAppend()); |
| // Usually the initialized is set to true. But here it must not. |
| // Because the prepend and append readers have to be instantiated |
| // on runtime |
| //newFilter.setInitialized(true); |
| return newFilter; |
| } |
| |
| /** |
| * Scans the parameters list for the "lines" parameter and uses |
| * it to set the number of lines to be returned in the filtered stream. |
| * also scan for skip parameter. |
| */ |
| private void initialize() throws IOException { |
| // get parameters |
| Parameter[] params = getParameters(); |
| if (params != null) { |
| for (int i = 0; i < params.length; i++) { |
| if ("prepend".equals(params[i].getName())) { |
| setPrepend(new File(params[i].getValue())); |
| continue; |
| } |
| if ("append".equals(params[i].getName())) { |
| setAppend(new File(params[i].getValue())); |
| continue; |
| } |
| } |
| } |
| if (prepend != null) { |
| if (!prepend.isAbsolute()) { |
| prepend = new File(getProject().getBaseDir(), prepend.getPath()); |
| } |
| prependReader = new BufferedReader(new FileReader(prepend)); |
| } |
| if (append != null) { |
| if (!append.isAbsolute()) { |
| append = new File(getProject().getBaseDir(), append.getPath()); |
| } |
| appendReader = new BufferedReader(new FileReader(append)); |
| } |
| } |
| } |
