| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2002 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 "The Jakarta Project", "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.util; |
| |
| import org.apache.tools.ant.AntClassLoader; |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.filters.BaseFilterReader; |
| import org.apache.tools.ant.filters.ChainableReader; |
| import org.apache.tools.ant.types.AntFilterReader; |
| import org.apache.tools.ant.types.FilterChain; |
| import org.apache.tools.ant.types.Path; |
| import org.apache.tools.ant.types.Parameter; |
| import org.apache.tools.ant.types.Parameterizable; |
| import org.apache.tools.ant.util.FileUtils; |
| |
| import java.io.*; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationTargetException; |
| import java.util.Vector; |
| |
| /** |
| * Process a FilterReader chain. |
| * |
| * @author <a href="mailto:umagesh@apache.org">Magesh Umasankar</a> |
| * @created 23 February 2002 |
| */ |
| public final class ChainReaderHelper { |
| |
| /** |
| * The primary reader to which the reader chain is to be attached. |
| */ |
| public Reader primaryReader; |
| |
| /** |
| * The size of the buffer to be used. |
| */ |
| public int bufferSize = 8192; |
| |
| /** |
| * Chain of filters |
| */ |
| public Vector filterChains = new Vector(); |
| |
| /** The Ant project */ |
| private Project project = null; |
| |
| /** |
| * Sets the primary reader |
| */ |
| public final void setPrimaryReader(Reader rdr) { |
| primaryReader = rdr; |
| } |
| |
| /** |
| * Set the project to work with |
| */ |
| public final void setProject(final Project project) { |
| this.project = project; |
| } |
| |
| /** |
| * Get the project |
| */ |
| public final Project getProject() { |
| return project; |
| } |
| |
| /** |
| * Sets the buffer size to be used. Defaults to 4096, |
| * if this method is not invoked. |
| */ |
| public final void setBufferSize(int size) { |
| bufferSize = size; |
| } |
| |
| /** |
| * Sets the collection of filter reader sets |
| */ |
| public final void setFilterChains(Vector fchain) { |
| filterChains = fchain; |
| } |
| |
| /** |
| * Assemble the reader |
| */ |
| public final Reader getAssembledReader() throws BuildException { |
| if (primaryReader == null) { |
| throw new BuildException("primaryReader must not be null."); |
| } |
| |
| Reader instream = primaryReader; |
| final int filterReadersCount = filterChains.size(); |
| final Vector finalFilters = new Vector(); |
| |
| for (int i = 0; i < filterReadersCount; i++) { |
| final FilterChain filterchain = |
| (FilterChain) filterChains.elementAt(i); |
| final Vector filterReaders = filterchain.getFilterReaders(); |
| final int readerCount = filterReaders.size(); |
| for (int j = 0; j < readerCount; j++) { |
| finalFilters.addElement(filterReaders.elementAt(j)); |
| } |
| } |
| |
| final int filtersCount = finalFilters.size(); |
| |
| if (filtersCount > 0) { |
| for (int i = 0; i < filtersCount; i++) { |
| Object o = finalFilters.elementAt(i); |
| |
| if (o instanceof AntFilterReader) { |
| final AntFilterReader filter = (AntFilterReader) finalFilters.elementAt(i); |
| final String className = filter.getClassName(); |
| final Path classpath = filter.getClasspath(); |
| final Project project = filter.getProject(); |
| if (className != null) { |
| try { |
| Class clazz = null; |
| if (classpath == null) { |
| clazz = Class.forName(className); |
| } else { |
| AntClassLoader al = new AntClassLoader(project, |
| classpath); |
| clazz = al.loadClass(className); |
| AntClassLoader.initializeClass(clazz); |
| } |
| if (clazz != null) { |
| if (!FilterReader.class.isAssignableFrom(clazz)) { |
| throw new BuildException(className + |
| " does not extend java.io.FilterReader"); |
| } |
| final Constructor[] constructors = |
| clazz.getConstructors(); |
| int j = 0; |
| for (; j < constructors.length; j++) { |
| Class[] types = constructors[j] |
| .getParameterTypes(); |
| if (types.length == 1 && |
| types[0].isAssignableFrom(Reader.class)) { |
| break; |
| } |
| } |
| final Reader[] rdr = {instream}; |
| instream = |
| (Reader) constructors[j].newInstance(rdr); |
| if (Parameterizable.class.isAssignableFrom(clazz)) { |
| final Parameter[] params = filter.getParams(); |
| ((Parameterizable) |
| instream).setParameters(params); |
| } |
| } |
| } catch (final ClassNotFoundException cnfe) { |
| throw new BuildException(cnfe); |
| } catch (final InstantiationException ie) { |
| throw new BuildException(ie); |
| } catch (final IllegalAccessException iae) { |
| throw new BuildException(iae); |
| } catch (final InvocationTargetException ite) { |
| throw new BuildException(ite); |
| } |
| } |
| } else if (o instanceof ChainableReader && |
| o instanceof Reader) { |
| if (project != null && o instanceof BaseFilterReader) { |
| ((BaseFilterReader) o).setProject(project); |
| } |
| instream = ((ChainableReader) o).chain(instream); |
| } |
| } |
| } |
| return instream; |
| } |
| |
| /** |
| * Read data from the reader and return the |
| * contents as a string. |
| */ |
| public final String readFully(Reader rdr) |
| throws IOException { |
| return FileUtils.readFully(rdr, bufferSize); |
| } |
| } |
