vb.net barcode maker WRITING ANT TASKS in Java

Painting Data Matrix in Java WRITING ANT TASKS

CHAPTER 1 9
Data Matrix Printer In Java
Using Barcode maker for Java Control to generate, create Data Matrix ECC200 image in Java applications.
www.OnBarcode.com
Recognize Data Matrix 2d Barcode In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
WRITING ANT TASKS
Draw UCC - 12 In Java
Using Barcode generator for Java Control to generate, create GS1 128 image in Java applications.
www.OnBarcode.com
PDF417 Maker In Java
Using Barcode encoder for Java Control to generate, create PDF 417 image in Java applications.
www.OnBarcode.com
conversion to the current platform s delimiters is automatic. Relative paths, from the project s base directory, may also be specified within the attribute value. Ant deals with the unpleasant issues of path and directory separators, giving your task a rich data structure that encapsulates it all. To support a path attribute in your task, implement a setPath method:
Barcode Encoder In Java
Using Barcode creation for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
Create Universal Product Code Version A In Java
Using Barcode maker for Java Control to generate, create UPC-A Supplement 2 image in Java applications.
www.OnBarcode.com
private Path path; public void setPath(Path path) { this.path = path; log("path = " + path); }
Printing ANSI/AIM Code 39 In Java
Using Barcode printer for Java Control to generate, create Code39 image in Java applications.
www.OnBarcode.com
Royal Mail Barcode Maker In Java
Using Barcode drawer for Java Control to generate, create RoyalMail4SCC image in Java applications.
www.OnBarcode.com
And in the build file, perhaps a path is set in this manner:
ECC200 Generator In Java
Using Barcode creator for Eclipse BIRT Control to generate, create Data Matrix image in BIRT reports applications.
www.OnBarcode.com
Data Matrix Drawer In None
Using Barcode drawer for Font Control to generate, create Data Matrix ECC200 image in Font applications.
www.OnBarcode.com
<property environment="env"/> <setter path="${env.TEMP}:build/output"/>
ECC200 Encoder In None
Using Barcode creator for Office Word Control to generate, create Data Matrix ECC200 image in Microsoft Word applications.
www.OnBarcode.com
Code 128C Printer In None
Using Barcode generation for Excel Control to generate, create USS Code 128 image in Excel applications.
www.OnBarcode.com
Note that the path is specified in a Unix style with a colon path separator and a forward slash as a directory separator. But running this on a Windows platform yields this result:
Scanning QR Code In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
EAN 13 Printer In VB.NET
Using Barcode encoder for .NET framework Control to generate, create GTIN - 13 image in .NET framework applications.
www.OnBarcode.com
[setter] path = C:\temp;C:\AntBook\Sections\Extending\tasks\build\output
QR Code ISO/IEC18004 Recognizer In VS .NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Barcode Creator In .NET
Using Barcode generation for Reporting Service Control to generate, create Barcode image in Reporting Service applications.
www.OnBarcode.com
Ant has automatically adjusted the path to suit our current platform regardless of the path style used in the build file. Also, notice that the relative path build/output has been set to the absolute path for us automatically. Enumerated attribute Ant does a lot to ease writing tasks, and the EnumeratedAttribute class is a prime example. If you only allow the value of an attribute to be from a fixed set of possible values, using Ant s EnumeratedAttribute type can save some validation coding time. Listing 19.2 shows a task with a version attribute that only allows the values 2.2 or 2.3.
Encoding QR Code In None
Using Barcode creator for Word Control to generate, create QR-Code image in Word applications.
www.OnBarcode.com
Reading PDF-417 2d Barcode In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Listing 19.2 Using EnumeratedAttribute to restrict an attribute value
Generating Data Matrix 2d Barcode In Visual Basic .NET
Using Barcode printer for Visual Studio .NET Control to generate, create DataMatrix image in VS .NET applications.
www.OnBarcode.com
Barcode Reader In C#.NET
Using Barcode Control SDK for Visual Studio .NET Control to generate, create, read, scan barcode image in Visual Studio .NET applications.
www.OnBarcode.com
package org.example.antbook.tasks; import org.apache.tools.ant.Task; import org.apache.tools.ant.types.EnumeratedAttribute; public class EnumTask extends Task { private String version = "2.3";
Sets default value Retrieves value from our
EnumeratedAttribute
public void setVersion(ServletVersion ver) { version = ver.getValue(); } public void execute() { log("Servlet version = " + version); }
subclass
HOW TASKS GET DATA
public static class ServletVersion extends EnumeratedAttribute { public String[] getValues() { return new String[] {"2.2", "2.3"}; } } }
Defines the allowable values in an inner class
EnumeratedAttribute is an abstract class with getValues being an abstract method that you must implement. The standard practice is to use a nested class unless there are other tasks that need to share the same enumerated values, in which case you can create a stand-alone class to be reused by other classes. Use getValue to retrieve the String value set by the build file, which Ant guarantees to be one of the allowed values. You can also retrieve the int index of the specified value using getIndex.
Class If your task has dynamic swappable implementations as part of its functionality using Class.forName, using a java.lang.Class setter ensures that the class exists or the build fails. This variant is only marginally useful because it will only search for classes within Ant s operating classpath, whereas tasks typically should be flexible enough to allow the build file to specify its own classpath. This reduces your build s dependency on its operating environment. We cover how to write tasks that operate on user-defined classpaths in section 19.9.1. We recommend that you use a String type for attributes that specify a classname, and use Class.forName to retrieve classes from the task s classpath specified with <taskdef>, or use AntClassLoader.loadClass to get classes from a different classpath. User-defined types Last, but not least, for attribute setter types is the capability for you to define your own type. Any class type that has a public String constructor is allowed, and this is actually the same mechanism the numeric datatypes use, since all the wrapper classes have constructors that take a single String parameter. This flexibility is a pleasant addition to writing tasks, allowing you to deal with richer objects in your task than simple strings. Inspired by a request by one of the developers of the <cc> task who asked that Ant support hexadecimal numbers natively, we decided to add our own support for it by defining a Hex type1 shown in listing 19.3.
A variant of this was added to Ant s codebase as org.apache.tools.ant.types.FlexInteger. It allows octal, hexadecimal, or decimal numbers to be used in Ant attributes.
Copyright © OnBarcode.com . All rights reserved.