umagesh 02/02/22 19:29:11
Added:
proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/taskdefs
LoadProperties.java
Log:
FilterReaderSet aware task to load Ant properties.
Revision Changes Path
1.1
jakarta-ant/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/taskdefs/LoadProperties.java
Index: LoadProperties.java
===================================================================
/*
* 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 [EMAIL PROTECTED]
*
* 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.taskdefs;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.types.AntFilterReader;
import org.apache.tools.ant.types.FilterReaderSet;
import org.apache.tools.ant.types.Parameter;
import org.apache.tools.ant.types.Parameterizable;
import java.io.*;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Vector;
/**
* Load a file's contents as Ant Properties.
*
* @author <a href="mailto:[EMAIL PROTECTED]">Magesh Umasankar</a>
* @created 20 February 2002
*/
public final class LoadProperties extends Task {
/**
* Source file
*/
private File srcFile = null;
/**
* Holds filterReaderSets
*/
private final Vector filterReaderSets = new Vector();
/**
* Sets the srcfile attribute.
*
* @param srcFile The new SrcFile value
*/
public final void setSrcFile(final File srcFile) {
this.srcFile = srcFile;
}
/**
* read in a source file's contents and load them up as Ant properties
*
* @exception BuildException if something goes wrong with the build
*/
public final void execute() throws BuildException {
//validation
if (srcFile == null) {
throw new BuildException("Source file not defined.");
}
if (!srcFile.exists()) {
throw new BuildException("Source file does not exist.");
}
if (!srcFile.isFile()) {
throw new BuildException("Source file is not a file.");
}
FileInputStream fis = null;
BufferedInputStream bis = null;
Reader instream = null;
try {
final long len = srcFile.length();
final int size=(int) len;
//open up the file
fis = new FileInputStream(srcFile);
bis = new BufferedInputStream(fis);
instream = new InputStreamReader(bis);
String text = processStream(instream, size);
if (!text.endsWith("\n")) {
text = text + "\n";
}
int index = 0;
if (text != null) {
while (index != -1) {
int oldIndex = index;
index = text.indexOf("\n", oldIndex);
if (index != -1) {
String line = text.substring(oldIndex, index);
if (line.endsWith("\r")) {
line = line.substring(0, line.length() - 1);
}
int equalIndex = line.indexOf("=");
int spaceIndex = line.indexOf(" ");
int sepIndex = -1;
if (equalIndex != -1 || spaceIndex != -1) {
if (equalIndex == -1) {
sepIndex = spaceIndex;
} else if (spaceIndex == -1) {
sepIndex = equalIndex;
} else {
sepIndex = Math.min(spaceIndex, equalIndex);
}
}
if (sepIndex != -1) {
String key = line.substring(0, sepIndex);
String value = line.substring(sepIndex + 1);
if (value != null && value.trim().length() > 0) {
project.setNewProperty(key, value);
}
}
++index;
}
}
}
} catch (final IOException ioe) {
final String message = "Unable to load file: " + ioe.toString();
throw new BuildException(message, ioe, location);
} catch (final BuildException be) {
throw be;
} finally {
try {
if (fis != null) {
fis.close();
}
} catch (IOException ioex) {
//ignore
}
}
}
/**
* Process the input by passing it through the reader chain.
*/
private final String processStream(final Reader inputReader, final int
size)
throws BuildException, IOException {
Reader instream = inputReader;
final char[] buffer = new char[size];
final int filterReadersCount = filterReaderSets.size();
final Vector finalFilters = new Vector();
for (int i = 0; i < filterReadersCount; i++) {
final FilterReaderSet filterset =
(FilterReaderSet) filterReaderSets.elementAt(i);
final Vector filterReaders = filterset.getFilterReaders();
final int readerCount = filterReaders.size();
for (int j = 0; j < readerCount; j++) {
final AntFilterReader afr =
(AntFilterReader) filterReaders.elementAt(j);
finalFilters.addElement(afr);
}
}
final int filtersCount = finalFilters.size();
if (filtersCount > 0) {
for (int i = 0; i < filtersCount; i++) {
final AntFilterReader filter =
(AntFilterReader) finalFilters.elementAt(i);
final String className = filter.getClassName();
if (className != null) {
try {
final Class clazz = Class.forName(className);
if (clazz != null) {
final Constructor[] constructors =
clazz.getConstructors();
final Reader[] rdr = {instream};
instream =
(Reader) constructors[0].newInstance(rdr);
if
(Parameterizable.class.isAssignableFrom(clazz)) {
final Parameter[] params = filter.getParams();
((Parameterizable)
instream).setParameters(params);
}
}
} catch (final ClassNotFoundException cnfe) {
throw new BuildException(cnfe, location);
} catch (final InstantiationException ie) {
throw new BuildException(ie, location);
} catch (final IllegalAccessException iae) {
throw new BuildException(iae, location);
} catch (final InvocationTargetException ite) {
throw new BuildException(ite, location);
}
}
}
}
int bufferLength = 0;
String text = null;
while (bufferLength != -1) {
bufferLength = instream.read(buffer);
if (bufferLength != -1) {
if (text == null) {
text = new String(buffer, 0, bufferLength);
} else {
text += new String(buffer, 0, bufferLength);
}
}
}
return text;
}
/**
* Add the FilterReaderSet element.
*/
public final void addFilterReaderSet(FilterReaderSet filter) {
filterReaderSets.addElement(filter);
}
//end class
}
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