Apache Ant Source Code Files
Apache Ant Source Code Files are inside the Apache Ant source package file
like apache-ant-1.10.10-src.zip.
Unzip the source package file and go to the "src/main" sub-directory,
you will see source code files.
Here is the list of Java source code files of the Apache Ant 1.10.10 in \Users\fyicenter\apache-ant-1.10.10\src\main:
✍: FYIcenter.com
⏎ org/apache/tools/ant/taskdefs/Concat.java
/*
* 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
*
* https://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.taskdefs;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.io.Writer;
import java.nio.file.Files;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.ProjectComponent;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.filters.util.ChainReaderHelper;
import org.apache.tools.ant.types.FileList;
import org.apache.tools.ant.types.FileSet;
import org.apache.tools.ant.types.FilterChain;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.types.Resource;
import org.apache.tools.ant.types.ResourceCollection;
import org.apache.tools.ant.types.resources.FileResource;
import org.apache.tools.ant.types.resources.Intersect;
import org.apache.tools.ant.types.resources.LogOutputResource;
import org.apache.tools.ant.types.resources.Resources;
import org.apache.tools.ant.types.resources.Restrict;
import org.apache.tools.ant.types.resources.StringResource;
import org.apache.tools.ant.types.resources.selectors.Exists;
import org.apache.tools.ant.types.resources.selectors.Not;
import org.apache.tools.ant.types.resources.selectors.ResourceSelector;
import org.apache.tools.ant.types.selectors.SelectorUtils;
import org.apache.tools.ant.util.ConcatResourceInputStream;
import org.apache.tools.ant.util.FileUtils;
import org.apache.tools.ant.util.ReaderInputStream;
import org.apache.tools.ant.util.ResourceUtils;
/**
* This class contains the 'concat' task, used to concatenate a series
* of files into a single stream. The destination of this stream may
* be the system console, or a file. The following is a sample
* invocation:
*
* <pre>
* <concat destfile="${build.dir}/index.xml"
* append="false">
*
* <fileset dir="${xml.root.dir}"
* includes="*.xml" />
*
* </concat>
* </pre>
*
*/
public class Concat extends Task implements ResourceCollection {
// The size of buffers to be used
private static final int BUFFER_SIZE = 8192;
private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();
private static final ResourceSelector EXISTS = new Exists();
private static final ResourceSelector NOT_EXISTS = new Not(EXISTS);
/**
* sub element points to a file or contains text
*/
public static class TextElement extends ProjectComponent {
private String value = "";
private boolean trimLeading = false;
private boolean trim = false;
private boolean filtering = true;
private String encoding = null;
/**
* whether to filter the text in this element
* or not.
*
* @param filtering true if the text should be filtered.
* the default value is true.
*/
public void setFiltering(boolean filtering) {
this.filtering = filtering;
}
/** return the filtering attribute */
private boolean getFiltering() {
return filtering;
}
/**
* The encoding of the text element
*
* @param encoding the name of the charset used to encode
*/
public void setEncoding(String encoding) {
this.encoding = encoding;
}
/**
* set the text using a file
* @param file the file to use
* @throws BuildException if the file does not exist, or cannot be
* read
*/
public void setFile(File file) throws BuildException {
// non-existing files are not allowed
if (!file.exists()) {
throw new BuildException("File %s does not exist.", file);
}
BufferedReader reader = null;
try {
if (this.encoding == null) {
reader = new BufferedReader(new FileReader(file));
} else {
reader = new BufferedReader(
new InputStreamReader(Files.newInputStream(file.toPath()),
this.encoding));
}
value = FileUtils.safeReadFully(reader);
} catch (IOException ex) {
throw new BuildException(ex);
} finally {
FileUtils.close(reader);
}
}
/**
* set the text using inline
* @param value the text to place inline
*/
public void addText(String value) {
this.value += getProject().replaceProperties(value);
}
/**
* s:^\s*:: on each line of input
* @param strip if true do the trim
*/
public void setTrimLeading(boolean strip) {
this.trimLeading = strip;
}
/**
* whether to call text.trim()
* @param trim if true trim the text
*/
public void setTrim(boolean trim) {
this.trim = trim;
}
/**
* @return the text, after possible trimming
*/
public String getValue() {
if (value == null) {
value = "";
}
if (value.trim().isEmpty()) {
value = "";
}
if (trimLeading) {
StringBuilder b = new StringBuilder();
boolean startOfLine = true;
for (final char ch : value.toCharArray()) {
if (startOfLine) {
if (ch == ' ' || ch == '\t') {
continue;
}
startOfLine = false;
}
b.append(ch);
if (ch == '\n' || ch == '\r') {
startOfLine = true;
}
}
value = b.toString();
}
if (trim) {
value = value.trim();
}
return value;
}
}
private interface ReaderFactory<S> {
Reader getReader(S s) throws IOException;
}
/**
* This class reads a Reader and ensures it ends with the desired linebreak
* @since Ant 1.10.10
*/
private final class LastLineFixingReader extends Reader {
private final Reader reader;
private int lastPos = 0;
private final char[] lastChars = new char[eolString.length()];
private boolean needAddSeparator = false;
private LastLineFixingReader(Reader reader) {
this.reader = reader;
}
/**
* Read a character from the current reader object. Advance
* to the next if the reader is finished.
* @return the character read, -1 for EOF on the last reader.
* @exception IOException - possibly thrown by the read for a reader
* object.
*/
@Override
public int read() throws IOException {
if (needAddSeparator) {
if (lastPos >= eolString.length()) {
return -1;
} else {
return eolString.charAt(lastPos++);
}
}
int ch = reader.read();
if (ch == -1) {
if (isMissingEndOfLine()) {
needAddSeparator = true;
lastPos = 1;
return eolString.charAt(0);
}
} else {
addLastChar((char) ch);
return ch;
}
return -1;
}
/**
* Read into the buffer <code>cbuf</code>.
* @param cbuf The array to be read into.
* @param off The offset.
* @param len The length to read.
* @exception IOException - possibly thrown by the reads to the
* reader objects.
*/
@Override
public int read(char[] cbuf, int off, int len)
throws IOException {
int amountRead = 0;
while (true) {
if (needAddSeparator) {
if (lastPos >= eolString.length()) {
break;
}
cbuf[off] = eolString.charAt(lastPos++);
len--;
off++;
amountRead++;
if (len == 0) {
return amountRead;
}
continue;
}
int nRead = reader.read(cbuf, off, len);
if (nRead == -1 || nRead == 0) {
if (isMissingEndOfLine()) {
needAddSeparator = true;
lastPos = 0;
} else {
break;
}
} else {
for (int i = nRead;
i > (nRead - lastChars.length);
--i) {
if (i <= 0) {
break;
}
addLastChar(cbuf[off + i - 1]);
}
len -= nRead;
off += nRead;
amountRead += nRead;
if (len == 0) {
return amountRead;
}
}
}
if (amountRead == 0) {
return -1;
}
return amountRead;
}
/**
* Close the current reader
*/
@Override
public void close() throws IOException {
reader.close();
}
/**
* if checking for end of line at end of file
* add a character to the lastchars buffer
*/
private void addLastChar(char ch) {
System.arraycopy(lastChars, 1, lastChars, 0, lastChars.length - 2 + 1);
lastChars[lastChars.length - 1] = ch;
}
/**
* return true if the lastchars buffer does
* not contain the line separator
*/
private boolean isMissingEndOfLine() {
for (int i = 0; i < lastChars.length; ++i) {
if (lastChars[i] != eolString.charAt(i)) {
return true;
}
}
return false;
}
}
/**
* This class reads from each of the source files in turn.
* The concatenated result can then be filtered as
* a single stream.
*/
private final class MultiReader<S> extends Reader {
private Reader reader = null;
private Iterator<S> readerSources;
private ReaderFactory<S> factory;
private final boolean filterBeforeConcat;
private MultiReader(Iterator<S> readerSources, ReaderFactory<S> factory,
boolean filterBeforeConcat) {
this.readerSources = readerSources;
this.factory = factory;
this.filterBeforeConcat = filterBeforeConcat;
}
private Reader getReader() throws IOException {
if (reader == null && readerSources.hasNext()) {
reader = factory.getReader(readerSources.next());
if (isFixLastLine()) {
reader = new LastLineFixingReader(reader);
}
if (filterBeforeConcat) {
reader = getFilteredReader(reader);
}
}
return reader;
}
private void nextReader() throws IOException {
close();
reader = null;
}
/**
* Read a character from the current reader object. Advance
* to the next if the reader is finished.
* @return the character read, -1 for EOF on the last reader.
* @exception IOException - possibly thrown by the read for a reader
* object.
*/
@Override
public int read() throws IOException {
while (getReader() != null) {
int ch = getReader().read();
if (ch == -1) {
nextReader();
} else {
return ch;
}
}
return -1;
}
/**
* Read into the buffer <code>cbuf</code>.
* @param cbuf The array to be read into.
* @param off The offset.
* @param len The length to read.
* @exception IOException - possibly thrown by the reads to the
* reader objects.
*/
@Override
public int read(char[] cbuf, int off, int len)
throws IOException {
int amountRead = 0;
while (getReader() != null) {
int nRead = getReader().read(cbuf, off, len);
if (nRead == -1 || nRead == 0) {
nextReader();
} else {
len -= nRead;
off += nRead;
amountRead += nRead;
if (len == 0) {
return amountRead;
}
}
}
if (amountRead == 0) {
return -1;
}
return amountRead;
}
/**
* Close the current reader
*/
@Override
public void close() throws IOException {
if (reader != null) {
reader.close();
}
}
private boolean isFixLastLine() {
return fixLastLine && textBuffer == null;
}
}
private final class ConcatResource extends Resource {
private ResourceCollection c;
private ConcatResource(ResourceCollection c) {
this.c = c;
}
@Override
public InputStream getInputStream() {
if (binary) {
ConcatResourceInputStream result = new ConcatResourceInputStream(c);
result.setManagingComponent(this);
return result;
}
Reader resourceReader;
if (filterBeforeConcat) {
resourceReader = new MultiReader<>(c.iterator(),
resourceReaderFactory, true);
} else {
resourceReader = getFilteredReader(
new MultiReader<>(c.iterator(), resourceReaderFactory, false));
}
Reader rdr;
if (header == null && footer == null) {
rdr = resourceReader;
} else {
int readerCount = 1;
if (header != null) {
readerCount++;
}
if (footer != null) {
readerCount++;
}
Reader[] readers = new Reader[readerCount];
int pos = 0;
if (header != null) {
readers[pos] = new StringReader(header.getValue());
if (header.getFiltering()) {
readers[pos] = getFilteredReader(readers[pos]);
}
pos++;
}
readers[pos++] = resourceReader;
if (footer != null) {
readers[pos] = new StringReader(footer.getValue());
if (footer.getFiltering()) {
readers[pos] = getFilteredReader(readers[pos]);
}
}
rdr = new MultiReader<>(Arrays.asList(readers).iterator(),
identityReaderFactory, false);
}
return outputEncoding == null ? new ReaderInputStream(rdr)
: new ReaderInputStream(rdr, outputEncoding);
}
@Override
public String getName() {
return resourceName == null
? "concat (" + String.valueOf(c) + ")" : resourceName;
}
}
// Attributes.
/**
* The destination of the stream. If <code>null</code>, the system
* console is used.
*/
private Resource dest;
/**
* Whether or not the stream should be appended if the destination file
* exists.
* Defaults to <code>false</code>.
*/
private boolean append;
/**
* Stores the input file encoding.
*/
private String encoding;
/** Stores the output file encoding. */
private String outputEncoding;
/** Stores the binary attribute */
private boolean binary;
/** Stores the filterBeforeConcat attribute */
private boolean filterBeforeConcat;
// Child elements.
/**
* This buffer stores the text within the 'concat' element.
*/
private StringBuffer textBuffer;
/**
* Stores a collection of file sets and/or file lists, used to
* select multiple files for concatenation.
*/
private Resources rc;
/** for filtering the concatenated */
private Vector<FilterChain> filterChains;
/** ignore dates on input files */
private boolean forceOverwrite = true;
/** overwrite read-only files */
private boolean force = false;
/** String to place at the start of the concatenated stream */
private TextElement footer;
/** String to place at the end of the concatenated stream */
private TextElement header;
/** add missing line.separator to files **/
private boolean fixLastLine = false;
/** endofline for fixlast line */
private String eolString;
/** outputwriter */
private Writer outputWriter = null;
/** whether to not create dest if no source files are
* available */
private boolean ignoreEmpty = true;
/** exposed resource name */
private String resourceName;
private ReaderFactory<Resource> resourceReaderFactory = new ReaderFactory<Resource>() {
@Override
public Reader getReader(Resource o) throws IOException {
InputStream is = o.getInputStream();
return new BufferedReader(encoding == null
? new InputStreamReader(is)
: new InputStreamReader(is, encoding));
}
};
private ReaderFactory<Reader> identityReaderFactory = o -> o;
/**
* Construct a new Concat task.
*/
public Concat() {
reset();
}
/**
* Reset state to default.
*/
public void reset() {
append = false;
forceOverwrite = true;
dest = null;
encoding = null;
outputEncoding = null;
fixLastLine = false;
filterChains = null;
footer = null;
header = null;
binary = false;
outputWriter = null;
textBuffer = null;
eolString = System.lineSeparator();
rc = null;
ignoreEmpty = true;
force = false;
}
// Attribute setters.
/**
* Sets the destination file, or uses the console if not specified.
* @param destinationFile the destination file
*/
public void setDestfile(File destinationFile) {
setDest(new FileResource(destinationFile));
}
/**
* Set the resource to write to.
* @param dest the Resource to write to.
* @since Ant 1.8
*/
public void setDest(Resource dest) {
this.dest = dest;
}
/**
* Sets the behavior when the destination exists. If set to
* <code>true</code> the task will append the stream data an
* {@link Appendable} resource; otherwise existing content will be
* overwritten. Defaults to <code>false</code>.
* @param append if true append output.
*/
public void setAppend(boolean append) {
this.append = append;
}
/**
* Sets the character encoding
* @param encoding the encoding of the input stream and unless
* outputencoding is set, the outputstream.
*/
public void setEncoding(String encoding) {
this.encoding = encoding;
if (outputEncoding == null) {
outputEncoding = encoding;
}
}
/**
* Sets the character encoding for outputting
* @param outputEncoding the encoding for the output file
* @since Ant 1.6
*/
public void setOutputEncoding(String outputEncoding) {
this.outputEncoding = outputEncoding;
}
/**
* Force overwrite existing destination file
* @param forceOverwrite if true always overwrite, otherwise only
* overwrite if the output file is older any of the
* input files.
* @since Ant 1.6
* @deprecated use #setOverwrite instead
*/
@Deprecated
public void setForce(boolean forceOverwrite) {
this.forceOverwrite = forceOverwrite;
}
/**
* Force overwrite existing destination file
* @param forceOverwrite if true always overwrite, otherwise only
* overwrite if the output file is older any of the
* input files.
* @since Ant 1.8.2
*/
public void setOverwrite(boolean forceOverwrite) {
setForce(forceOverwrite);
}
/**
* Whether read-only destinations will be overwritten.
*
* <p>Defaults to false</p>
*
* @param f boolean
* @since Ant 1.8.2
*/
public void setForceReadOnly(boolean f) {
force = f;
}
/**
* Sets the behavior when no source resource files are available. If set to
* <code>false</code> the destination file will always be created.
* Defaults to <code>true</code>.
* @param ignoreEmpty if false, honour destination file creation.
* @since Ant 1.8.0
*/
public void setIgnoreEmpty(boolean ignoreEmpty) {
this.ignoreEmpty = ignoreEmpty;
}
/**
* Set the name that will be reported by the exposed {@link Resource}.
* @param resourceName to set
* @since Ant 1.8.3
*/
public void setResourceName(String resourceName) {
this.resourceName = resourceName;
}
// Nested element creators.
/**
* Path of files to concatenate.
* @return the path used for concatenating
* @since Ant 1.6
*/
public Path createPath() {
Path path = new Path(getProject());
add(path);
return path;
}
/**
* Set of files to concatenate.
* @param set the set of files
*/
public void addFileset(FileSet set) {
add(set);
}
/**
* List of files to concatenate.
* @param list the list of files
*/
public void addFilelist(FileList list) {
add(list);
}
/**
* Add an arbitrary ResourceCollection.
* @param c the ResourceCollection to add.
* @since Ant 1.7
*/
public void add(ResourceCollection c) {
synchronized (this) {
if (rc == null) {
rc = new Resources();
rc.setProject(getProject());
rc.setCache(true);
}
}
rc.add(c);
}
/**
* Adds a FilterChain.
* @param filterChain a filterchain to filter the concatenated input
* @since Ant 1.6
*/
public void addFilterChain(FilterChain filterChain) {
if (filterChains == null) {
filterChains = new Vector<>();
}
filterChains.addElement(filterChain);
}
/**
* This method adds text which appears in the 'concat' element.
* @param text the text to be concatenated.
*/
public void addText(String text) {
if (textBuffer == null) {
// Initialize to the size of the first text fragment, with
// the hopes that it's the only one.
textBuffer = new StringBuffer(text.length());
}
// Append the fragment -- we defer property replacement until
// later just in case we get a partial property in a fragment.
textBuffer.append(text);
}
/**
* Add a header to the concatenated output
* @param headerToAdd the header
* @since Ant 1.6
*/
public void addHeader(TextElement headerToAdd) {
this.header = headerToAdd;
}
/**
* Add a footer to the concatenated output
* @param footerToAdd the footer
* @since Ant 1.6
*/
public void addFooter(TextElement footerToAdd) {
this.footer = footerToAdd;
}
/**
* Append line.separator to files that do not end
* with a line.separator, default false.
* @param fixLastLine if true make sure each input file has
* new line on the concatenated stream
* @since Ant 1.6
*/
public void setFixLastLine(boolean fixLastLine) {
this.fixLastLine = fixLastLine;
}
/**
* Specify the end of line to find and to add if
* not present at end of each input file. This attribute
* is used in conjunction with fixlastline.
* @param crlf the type of new line to add -
* cr, mac, lf, unix, crlf, or dos
* @since Ant 1.6
*/
public void setEol(FixCRLF.CrLf crlf) {
String s = crlf.getValue();
if ("cr".equals(s) || "mac".equals(s)) {
eolString = "\r";
} else if ("lf".equals(s) || "unix".equals(s)) {
eolString = "\n";
} else if ("crlf".equals(s) || "dos".equals(s)) {
eolString = "\r\n";
}
}
/**
* Set the output writer. This is to allow
* concat to be used as a nested element.
* @param outputWriter the output writer.
* @since Ant 1.6
*/
public void setWriter(Writer outputWriter) {
this.outputWriter = outputWriter;
}
/**
* Set the binary attribute. If true, concat will concatenate the files
* byte for byte. This mode does not allow any filtering or other
* modifications to the input streams. The default value is false.
* @since Ant 1.6.2
* @param binary if true, enable binary mode.
*/
public void setBinary(boolean binary) {
this.binary = binary;
}
/**
* Set the filterBeforeConcat attribute. If true, concat will filter each
* input through the filterchain before concatenating the results. This
* allows to e.g. use the FileTokenizer to tokenize each input.
* @param filterBeforeConcat if true, filter each input before concatenation
* @since Ant 1.10.10
*/
public void setFilterBeforeConcat(final boolean filterBeforeConcat) {
this.filterBeforeConcat = filterBeforeConcat;
}
/**
* Execute the concat task.
*/
@Override
public void execute() {
validate();
if (binary && dest == null) {
throw new BuildException(
"dest|destfile attribute is required for binary concatenation");
}
ResourceCollection c = getResources();
if (isUpToDate(c)) {
log(dest + " is up-to-date.", Project.MSG_VERBOSE);
return;
}
if (c.isEmpty() && ignoreEmpty) {
return;
}
try {
//most of these are defaulted because the concat-as-a-resource code hijacks a lot:
ResourceUtils.copyResource(new ConcatResource(c), dest == null
? new LogOutputResource(this, Project.MSG_WARN)
: dest,
null, null, true, false, append, null,
null, getProject(), force);
} catch (IOException e) {
throw new BuildException("error concatenating content to " + dest, e);
}
}
/**
* Implement ResourceCollection.
* @return Iterator<Resource>.
*/
@Override
public Iterator<Resource> iterator() {
validate();
return Collections
.<Resource> singletonList(new ConcatResource(getResources()))
.iterator();
}
/**
* Implement ResourceCollection.
* @return 1.
*/
@Override
public int size() {
return 1;
}
/**
* Implement ResourceCollection.
* @return false.
*/
@Override
public boolean isFilesystemOnly() {
return false;
}
/**
* Validate configuration options.
*/
private void validate() {
// treat empty nested text as no text
sanitizeText();
// if binary check if incompatible attributes are used
if (binary) {
if (textBuffer != null) {
throw new BuildException(
"Nested text is incompatible with binary concatenation");
}
if (encoding != null || outputEncoding != null) {
throw new BuildException(
"Setting input or output encoding is incompatible with binary concatenation");
}
if (filterChains != null) {
throw new BuildException(
"Setting filters is incompatible with binary concatenation");
}
if (fixLastLine) {
throw new BuildException(
"Setting fixlastline is incompatible with binary concatenation");
}
if (header != null || footer != null) {
throw new BuildException(
"Nested header or footer is incompatible with binary concatenation");
}
}
if (dest != null && outputWriter != null) {
throw new BuildException(
"Cannot specify both a destination resource and an output writer");
}
// Sanity check our inputs.
if (rc == null && textBuffer == null) {
// Nothing to concatenate!
throw new BuildException(
"At least one resource must be provided, or some text.");
}
if (rc != null && textBuffer != null) {
// If using resources, disallow inline text. This is similar to
// using GNU 'cat' with file arguments--stdin is simply ignored.
throw new BuildException(
"Cannot include inline text when using resources.");
}
}
/**
* Get the resources to concatenate.
*/
private ResourceCollection getResources() {
if (rc == null) {
return new StringResource(getProject(), textBuffer.toString());
}
if (dest != null) {
Intersect checkDestNotInSources = new Intersect();
checkDestNotInSources.setProject(getProject());
checkDestNotInSources.add(rc);
checkDestNotInSources.add(dest);
if (checkDestNotInSources.size() > 0) {
throw new BuildException(
"Destination resource %s was specified as an input resource.",
dest);
}
}
Restrict noexistRc = new Restrict();
noexistRc.add(NOT_EXISTS);
noexistRc.add(rc);
for (Resource r : noexistRc) {
log(r + " does not exist.", Project.MSG_ERR);
}
Restrict result = new Restrict();
result.add(EXISTS);
result.add(rc);
return result;
}
private boolean isUpToDate(ResourceCollection c) {
return dest != null && !forceOverwrite
&& c.stream().noneMatch(r -> SelectorUtils.isOutOfDate(r, dest, FILE_UTILS.getFileTimestampGranularity()));
}
/**
* Treat empty nested text as no text.
*
* <p>Depending on the XML parser, addText may have been called
* for "ignorable whitespace" as well.</p>
*/
private void sanitizeText() {
if (textBuffer != null && textBuffer.toString().trim().isEmpty()) {
textBuffer = null;
}
}
private Reader getFilteredReader(Reader r) {
if (filterChains == null) {
return r;
}
ChainReaderHelper helper = new ChainReaderHelper();
helper.setBufferSize(BUFFER_SIZE);
helper.setPrimaryReader(r);
helper.setFilterChains(filterChains);
helper.setProject(getProject());
//used to be a BufferedReader here, but we should be buffering lower:
return helper.getAssembledReader();
}
}
⏎ org/apache/tools/ant/taskdefs/Concat.java
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