diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/Truncate.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/Truncate.java | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/Truncate.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/Truncate.java deleted file mode 100644 index fe5e9a7a..00000000 --- a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/Truncate.java +++ /dev/null @@ -1,205 +0,0 @@ -/* - * 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 java.io.IOException; -import java.io.RandomAccessFile; - -import org.apache.tools.ant.BuildException; -import org.apache.tools.ant.Project; -import org.apache.tools.ant.Task; -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.FileProvider; -import org.apache.tools.ant.types.resources.FileResource; -import org.apache.tools.ant.util.FileUtils; - -/** - * Set the length of one or more files, as the intermittently available - * <code>truncate</code> Unix utility/function. - * @since Ant 1.7.1 - */ -public class Truncate extends Task { - - private static final int BUFFER_SIZE = 1024; - - private static final Long ZERO = new Long(0L); - - private static final String NO_CHILD = "No files specified."; - - private static final String INVALID_LENGTH = "Cannot truncate to length "; - - private static final String READ_WRITE = "rw"; - - private static final FileUtils FILE_UTILS = FileUtils.getFileUtils(); - - private static final byte[] FILL_BUFFER = new byte[BUFFER_SIZE]; - - private Path path; - private boolean create = true; - private boolean mkdirs = false; - - private Long length; - private Long adjust; - - /** - * Set a single target File. - * @param f the single File - */ - public void setFile(File f) { - add(new FileResource(f)); - } - - /** - * Add a nested (filesystem-only) ResourceCollection. - * @param rc the ResourceCollection to add. - */ - public void add(ResourceCollection rc) { - getPath().add(rc); - } - - /** - * Set the amount by which files' lengths should be adjusted. - * It is permissible to append K / M / G / T / P. - * @param adjust (positive or negative) adjustment amount. - */ - public void setAdjust(Long adjust) { - this.adjust = adjust; - } - - /** - * Set the length to which files should be set. - * It is permissible to append K / M / G / T / P. - * @param length (positive) adjustment amount. - */ - public void setLength(Long length) { - this.length = length; - if (length != null && length.longValue() < 0) { - throw new BuildException(INVALID_LENGTH + length); - } - } - - /** - * Set whether to create nonexistent files. - * @param create boolean, default <code>true</code>. - */ - public void setCreate(boolean create) { - this.create = create; - } - - /** - * Set whether, when creating nonexistent files, nonexistent directories - * should also be created. - * @param mkdirs boolean, default <code>false</code>. - */ - public void setMkdirs(boolean mkdirs) { - this.mkdirs = mkdirs; - } - - /** {@inheritDoc}. */ - public void execute() { - if (length != null && adjust != null) { - throw new BuildException( - "length and adjust are mutually exclusive options"); - } - if (length == null && adjust == null) { - length = ZERO; - } - if (path == null) { - throw new BuildException(NO_CHILD); - } - for (Resource r : path) { - File f = r.as(FileProvider.class).getFile(); - if (shouldProcess(f)) { - process(f); - } - } - } - - private boolean shouldProcess(File f) { - if (f.isFile()) { - return true; - } - if (!create) { - return false; - } - Exception exception = null; - try { - if (FILE_UTILS.createNewFile(f, mkdirs)) { - return true; - } - } catch (IOException e) { - exception = e; - } - String msg = "Unable to create " + f; - if (exception == null) { - log(msg, Project.MSG_WARN); - return false; - } - throw new BuildException(msg, exception); - } - - private void process(File f) { - long len = f.length(); - long newLength = length == null - ? len + adjust.longValue() : length.longValue(); - - if (len == newLength) { - //nothing to do! - return; - } - RandomAccessFile raf = null; - try { - raf = new RandomAccessFile(f, READ_WRITE); - } catch (Exception e) { - throw new BuildException("Could not open " + f + " for writing", e); - } - try { - if (newLength > len) { - long pos = len; - raf.seek(pos); - while (pos < newLength) { - long writeCount = Math.min(FILL_BUFFER.length, - newLength - pos); - raf.write(FILL_BUFFER, 0, (int) writeCount); - pos += writeCount; - } - } else { - raf.setLength(newLength); - } - } catch (IOException e) { - throw new BuildException("Exception working with " + raf, e); - } finally { - try { - raf.close(); - } catch (IOException e) { - log("Caught " + e + " closing " + raf, Project.MSG_WARN); - } - } - } - - private synchronized Path getPath() { - if (path == null) { - path = new Path(getProject()); - } - return path; - } - -} |