| Introduction |
This page discusses the following Batik installation issues: System requirements Choosing a distribution to download Optional components Jar file dependencies Verifying a distribution
| System Requirements |
Batik requires the following systems to be already installed in your system: Java Virtual Machine A Java 1.3 or greater compatible virtual machine must be present.
| Choosing a distribution to download |
To install Batik, you will need to go to the download area and download one or more ZIP file containing the distribution of your choice. It is good practice to verify the integrity of the distribution files, especially if you are using one of our mirror sites. Here are the various components you will find in the download area and their intended use: batik-version.zip (e.g., `batik-1.5.zip`) The binary distribution contains a compiled executable JAR files that let you get started with Batik easily. This is the recommended distribution if you want to look at Batik's features, or you want to experiment with SVG and see the fun things you can do with Batik. The binary distribution comes with a set of sample SVG files. batik-src-version.zip (e.g., `batik-src-1.5.zip`) The source distribution contains a complete snapshot of the Batik source code, documentation, regression tools and utilities as well as the script for building Batik. That distribution is a snapshot of the CVS repository. This is the recommended distribution for developers who want to dive into the code and understand how Batik can be integrated in their applications or how Batik can be extended. batik-docs-version.zip The documentation bundle contains a copy of the Javadoc for the Batik source code. We make nightly copies of the source tree available from the Apache build server. These builds represent the current state of development and may or may not be as stable as releases. There are two types of distributions provided. batik-cvs-date.zip (e.g., `batik-cvs-03-09-26.zip`) This contains a complete copy of the CVS tree, including support for running regard Batik's regression testing utility. In particular this includes all the reference images for testing. Developers are encouraged to get these or better use CVS directly. batik-src-date.zip (e.g., `batik-src-03-09-26.zip`) This contains all the source code and libraries needed to build and run Batik from source. But does not include the testing facilities. Older releases are available from the Apache archives. However, we strongly recommend using the current release of Batik. In all cases, the user should: Make sure a Java Development Kit (JDK) is installed on the computer where Batik will be installed. See System Requirements. Make sure that the `java` runtime is in the `PATH` environment variable. Select the directory where he/she wants to download the distribution Download the desired distribution from the download area Download the associated PGP signature (.asc) and KEYS file (preferable) or MD5 hash (.md5). This must be done directly from the Apache download area to mean anything. Open a console and go to the directory where the distribution was downloaded. Verify the integrity of the distribution Unpack the distribution with Java's JAR utility: `jar xvf <distribution>` For example, if you have downloaded batik-1.5.zip into /home/IamHere, type the following at the command prompt: `cd /home/IamHere` `jar xvf batik-1.5.zip` IMPORTANT: UNIX users, do not use the `unzip` utility to unpack the various Batik zip files, as this would not set the directories access rights properly. From there, following the instructions specific to the application you want to use. For example, see the SVG Browser page or the SVG Rasterizer page for an explanation on how to use these tools.
| Optional Components |
By default, Batik source distribution comes with the Mozilla Rhino JavaScript Engine (`js.jar`). To enable other scripting languages support, you will only need to install the correct jar files in `lib` directory of Batik and to recompile your distribution. For Python, you need to download Jython distribution at the following URL http://www.jython.org. Then you put the `jython.jar` file in the Batik `lib` directory. For Tcl, you need to download Jacl & TclBlend distribution at the following URL http://dev.scriptics.com/software/java. Then you put the `jacl.jar` & `tcljava.jar` files in the Batik `lib` directory. Conversely, you can remove the `js.jar` of the Batik `lib` directory to remove JavaScript support and have a smaller distribution.
| Jar File Dependency Graph |
The Batik Distribution comes with many Jar files. Not all of them are needed in every case (although the provided applications tend to use most of them). The following is a diagram showing the dependencies between the various jar files in the Batik binary distribution (it also shows the major package interdependencies for source developers). Jar files in white boxes are library jar files that Batik includes from external sources. The light blue boxes correspond to library jar files (those found in the 'lib' directory of a binary distribution) built from Batik source code. The dark blue boxes represent the application jar files. When boxes touch, the box on top depends on the box below it (there is no horizontal touching). Arrows also indicate dependencies (the source of the arrow depends on the destination). In some cases a thick underline with an arrow is used to indicate that a large number of jar files share a common dependency, this however does not indicate any dependency between the jar files underlined.
| Some jar file names are shortened for clarity. All 'batik' package references are short for 'org.apache.batik'.
It is worth pointing out that a determined/clever programmer may be able to pare down some of these dependencies. For example the 'batik-dom.jar' depends on 'xerces.jar' because of the SAXDocumentFactory class in 'org.apache.batik.dom.util'. If you didn't need to parse XML it would be possible to ignore or break this dependency and still use the 'batik-dom.jar' file for it's DOM implementation.
| Verify Releases |
It is essential that you verify the integrity of the downloaded files using the PGP or MD5 signatures. The PGP signatures can be verified using PGP or GPG. First download the KEYS as well as the `asc` signature file for the particular distribution you choose. Make sure you get these files from the main distribution directory , rather than from a mirror. Then verify the signatures using `% pgpk -a KEYS % pgpv batik-1.5.zip.asc` or `% pgp -ka KEYS % pgp batik-1.5.zip.asc` or `% gpg --import KEYS % gpg --verify batik-1.5.zip.asc` Alternatively, you can verify the MD5 signature on the files. A UNIX program called `md5` or `md5sum` is included in many UNIX distributions. It is also available as part of GNU Textutils . Windows users can get binary md5 programs from here , here , or here . We recommend using PGP signatures as they can provide a much higher level of assurance compared with MD5.

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