/*
* 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.taskdefs;
import java.io.File;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.types.Resource;
import org.apache.tools.ant.types.ResourceCollection;
import org.apache.tools.ant.types.resources.FileProvider;
import org.apache.tools.ant.types.resources.FileResource;
/**
* Abstract Base class for unpack tasks.
*
* @since Ant 1.5
*/
public abstract class Unpack extends Task {
// CheckStyle:VisibilityModifier OFF - bc
protected File source;
protected File dest;
protected Resource srcResource;
// CheckStyle:VisibilityModifier ON
/**
* @deprecated since 1.5.x.
* setSrc(String) is deprecated and is replaced with
* setSrc(File) to make Ant's Introspection
* mechanism do the work and also to encapsulate operations on
* the type in its own class.
* @ant.attribute ignore="true"
* @param src a <code>String</code> value
*/
public void setSrc(String src) {
log("DEPRECATED - The setSrc(String) method has been deprecated."
+ " Use setSrc(File) instead.");
setSrc(getProject().resolveFile(src));
}
/**
* @deprecated since 1.5.x.
* setDest(String) is deprecated and is replaced with
* setDest(File) to make Ant's Introspection
* mechanism do the work and also to encapsulate operations on
* the type in its own class.
* @ant.attribute ignore="true"
* @param dest a <code>String</code> value
*/
public void setDest(String dest) {
log("DEPRECATED - The setDest(String) method has been deprecated."
+ " Use setDest(File) instead.");
setDest(getProject().resolveFile(dest));
}
/**
* The file to expand; required.
* @param src file to expand
*/
public void setSrc(File src) {
setSrcResource(new FileResource(src));
}
/**
* The resource to expand; required.
* @param src resource to expand
*/
public void setSrcResource(Resource src) {
if (!src.isExists()) {
throw new BuildException(
"the archive " + src.getName() + " doesn't exist");
}
if (src.isDirectory()) {
throw new BuildException(
"the archive " + src.getName() + " can't be a directory");
}
FileProvider fp = src.as(FileProvider.class);
if (fp != null) {
source = fp.getFile();
} else if (!supportsNonFileResources()) {
throw new BuildException(
"The source " + src.getName()
+ " is not a FileSystem "
+ "Only FileSystem resources are"
+ " supported.");
}
srcResource = src;
}
/**
* Set the source Archive resource.
* @param a the archive as a single element Resource collection.
*/
public void addConfigured(ResourceCollection a) {
if (a.size() != 1) {
throw new BuildException("only single argument resource collections"
+ " are supported as archives");
}
setSrcResource(a.iterator().next());
}
/**
* The destination file or directory; optional.
* @param dest destination file or directory
*/
public void setDest(File dest) {
this.dest = dest;
}
private void validate() throws BuildException {
if (srcResource == null) {
throw new BuildException("No Src specified", getLocation());
}
if (dest == null) {
dest = new File(source.getParent());
}
if (dest.isDirectory()) {
String defaultExtension = getDefaultExtension();
createDestFile(defaultExtension);
}
}
private void createDestFile(String defaultExtension) {
String sourceName = source.getName();
int len = sourceName.length();
if (defaultExtension != null
&& len > defaultExtension.length()
&& defaultExtension.equalsIgnoreCase(
sourceName.substring(len - defaultExtension.length()))) {
dest = new File(dest, sourceName.substring(0,
len - defaultExtension.length()));
} else {
dest = new File(dest, sourceName);
}
}
/**
* Execute the task.
* @throws BuildException on error
*/
public void execute() throws BuildException {
File savedDest = dest; // may be altered in validate
try {
validate();
extract();
} finally {
dest = savedDest;
}
}
/**
* Get the extension.
* This is to be overridden by subclasses.
* @return the default extension.
*/
protected abstract String getDefaultExtension();
/**
* Do the uncompressing.
* This is to be overridden by subclasses.
*/
protected abstract void extract();
/**
* Whether this task can deal with non-file resources.
*
* <p>This implementation returns false.</p>
* @return false for this task.
* @since Ant 1.7
*/
protected boolean supportsNonFileResources() {
return false;
}
}