task to create a temporary filename in a property; docs and tests to follow

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@272585 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/TempFile.java

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+/*
+ *  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.taskdefs;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.Properties;
+import org.apache.tools.ant.Task;
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.util.FileUtils;
+
+/**
+ *  This task fills a proprerty with a temporary file
+ *
+ *@author      steve loughran
+ *@since       Ant 1.5
+ *@ant.task
+ */
+
+public class TempFile extends Task {
+
+    /**
+     *  name of property to set
+     */
+    private String property;
+
+    /**
+     *  directory to create the file in. can be null
+     */
+    private File destDir = null;
+
+    /**
+     *  prefix for the file
+     */
+    private String prefix;
+
+    /**
+     *  suffix for the file
+     */
+    private String suffix = "";
+
+
+    /**
+     *  Sets the property attribute of the TempFile object
+     *
+     *@param  property  The property to set
+     */
+    public void setProperty(String property) {
+        this.property = property;
+    }
+
+
+    /**
+     *  destination directory. If null, 
+     the parent directory is used instead
+     *
+     *@param  destDir  The new destDir value
+     */
+    public void setDestDir(File destDir) {
+        this.destDir = destDir;
+    }
+
+
+    /**
+     *  optional prefix string
+     *
+     *@param  prefix  string to prepend to generated string
+     */
+    public void setPrefix(String prefix) {
+        this.prefix = prefix;
+    }
+
+
+    /**
+     *  Suffix string for the temp file (optional)
+     *
+     *@param  suffix  suffix including any "." , e.g ".xml"
+     */
+    public void setSuffix(String suffix) {
+        this.suffix = suffix;
+    }
+
+
+    /**
+     *  create the temp file
+     *
+     *@exception  BuildException  if something goes wrong with the build
+     */
+    public void execute() throws BuildException {
+        if (property == null || property.length() == 0) {
+            throw new BuildException("no property specified");
+        }
+        if (destDir == null) {
+            destDir = project.resolveFile(".");
+        }
+        FileUtils utils = FileUtils.newFileUtils();
+        File tfile = utils.createTempFile(prefix, suffix, destDir);
+        project.setNewProperty(property, tfile.toString());
+    }
+}