wangwei
/
antliscence
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<html>
<head>
<link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
<title>XmlProperty Task</title>
</head>

<body>

<h2 id="xmlproperty">XmlProperty</h2>
<h3>Description</h3>
<p>
Loads property values from a well-formed xml file. There are no other restrictions
than "well-formed". You can choose the layout you want. For example this XML property file:
<pre>
  &lt;root&gt;
    &lt;properties&gt;
      &lt;foo&gt;bar&lt;/foo&gt;
    &lt;/properties&gt;
  &lt;/root&gt;
</pre>
is roughly equivalent to this Java property file:
<pre>
  root.properties.foo = bar
</pre>

<p>
By default, this load
does <em>no</em> processing of the input.  In particular, unlike the
<a href="property.html">Property task</a>, property references
(i.e., <samp>${foo}</samp>) are not resolved.
<p>
<h3 id="semanticAttributes">Semantic Attributes</h3>
Input processing can be enabled by using the <b>semanticAttributes</b>
attribute.  If this attribute is set to <i>true</i> (its default is
<i>false</i>), the following processing occurs as the input XML file
is loaded:
<ul>
  <li>Property references are resolved.</li>
  <li>The following attributes are treated differently:
    <ul>
      <li><b>id</b>: The property is associated with the given id value.</li>
      <li><b>location</b>: The property is treated as a file location</li>
      <li><b>refid</b>: The property is set to the value of the
          referenced property.</li>
      <li><b>value</b>: The property is set to the value indicated.</li>
    </ul>
  </li>
  <li><a href="../using.html#path">Path-like Structures</a> can be defined
      by use of the following attributes:
    <ul>
      <li><b>pathid</b>: The given id is used to identify a path.  The
          nested XML tag name is ignored.  Child elements can be used
          (XML tag names are ignored) to identify elements of the path.</li>
    </ul>
  </li>
</ul>
<p>
For example, with semantic attribute processing enabled, this XML property
file:
</p>
<pre>
  &lt;root&gt;
    &lt;properties&gt;
      &lt;foo location="bar"/&gt;
      &lt;quux&gt;${root.properties.foo}&lt;/quux&gt;
    &lt;/properties&gt;
  &lt;/root&gt;
</pre>
is roughly equivalent to the following fragments in a build.xml file:
<pre>
  &lt;property name="root.properties.foo" location="bar"/&gt;
  &lt;property name="root.properties.quux" value="${root.properties.foo}"/&gt;
</pre>

<h3>Parameters</h3>
<table>
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">file</td>
    <td valign="top">The XML file to parse.</td>
    <td valign="top" align="center">Yes, or a nested resource collection.</td>
  </tr>
  <tr>
    <td valign="top">prefix</td>
    <td valign="top">The prefix to prepend to each property</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">keepRoot</td>
    <td valign="top">Keep the xml root tag as the
                     first value in the property name.</td>
    <td valign="top" align="center">No, default is <i>true</i>.</td>
  </tr>
  <tr>
    <td valign="top">validate</td>
    <td valign="top">Validate the input file (e.g. by a DTD). Otherwise the XML must only be well-formed.</td>
    <td valign="top" align="center">No, default is <i>false</i>.</td>
  </tr>
  <tr>
    <td valign="top">collapseAttributes</td>
    <td valign="top">Treat attributes as nested elements.</td>
    <td valign="top" align="center">No, default is <i>false</i>.</td>
  </tr>
  <tr>
    <td valign="top">semanticAttributes</td>
    <td valign="top">Enable special handling of certain attribute names.
                     See the <a href="#semanticAttributes">Semantic Attributes</a>
                     section for more information.</td>
    <td valign="top" align="center">No, default is <i>false</i>.</td>
  </tr>
  <tr>
    <td valign="top">includeSemanticAttribute</td>
    <td valign="top">Include the semantic attribute name
                     as part of the property name.  Ignored if
                     <i>semanticAttributes</i> is not set to <i>true</i>.
                     See the <a href="#semanticAttributes">Semantic Attributes</a>
                     section for more information.</td>
    <td valign="top" align="center">No, default is <i>false</i>.</td>
  </tr>
  <tr>
    <td valign="top">rootDirectory</td>
    <td valign="top">The directory to use for resolving file references. Ignored
                     if <i>semanticAttributes</i> is not set to <i>true</i>.</td>
    <td valign="top" align="center">No, default is <code>${basedir}</code>.</td>
  </tr>
  <tr>
    <td valign="top">delimiter</td>
    <td valign="top">Delimiter for splitting multiple values.<br><em>since Apache Ant 1.7.1</em></td>
    <td valign="top" align="center">No, defaults to comma</td>
  </tr>
</table>

<h3 id="nested">Nested Elements</h3>
<h4>xmlcatalog</h4>
<p>The <a href="../Types/xmlcatalog.html"><tt>&lt;xmlcatalog&gt;</tt></a>
element is used to perform entity resolution.</p>

<h4>any <a href="../Types/resources.html">resource</a> or single element
resource collection</h4>

<p>The specified resource will be used as input.</p>

<h3 id="examples">Examples</h3>

<h4>Non-semantic Attributes</h4>

<p>Here is an example xml file that does not have any semantic attributes.</p>

<pre>
   &lt;root-tag myattr="true"&gt;
    &lt;inner-tag someattr="val"&gt;Text&lt;/inner-tag&gt;
    &lt;a2&gt;&lt;a3&gt;&lt;a4&gt;false&lt;/a4&gt;&lt;/a3&gt;&lt;/a2&gt;
   &lt;/root-tag&gt;
</pre>

<h5>default loading</h5>
<p>This entry in a build file:
<pre>   &lt;xmlproperty file="somefile.xml"/&gt;</pre>
is equivalent to the following properties:
<pre>
   root-tag(myattr)=true
   root-tag.inner-tag=Text
   root-tag.inner-tag(someattr)=val
   root-tag.a2.a3.a4=false
</pre>

<h5>collapseAttributes=false</h5>
<p>This entry in a build file:
<pre>   &lt;xmlproperty file="somefile.xml" collapseAttributes="true"/&gt;</pre>
is equivalent to the following properties:
<pre>
   root-tag.myattr=true
   root-tag.inner-tag=Text
   root-tag.inner-tag.someatt=val
   root-tag.a2.a3.a4=false
</pre>

<h5>keepRoot=false</h5>
<p>This entry in a build file:
<pre>   &lt;xmlproperty file="somefile.xml" keepRoot="false"/&gt;</pre>
is equivalent to the following properties:
<pre>
   inner-tag=Text
   inner-tag(someattr)=val
   a2.a3.a4=false
</pre>

<h4>Semantic Attributes</h4>

<p>Here is an example xml file that has semantic attributes.</p>
<pre>
  &lt;root-tag&gt;
    &lt;version value="0.0.1"/&gt;
    &lt;build folder="build"&gt;
      &lt;classes id="build.classes" location="${build.folder}/classes"/&gt;
      &lt;reference refid="build.classes"/&gt;
    &lt;/build&gt;
    &lt;compile&gt;
      &lt;classpath pathid="compile.classpath"&gt;
        &lt;pathelement location="${build.classes}"/&gt;
      &lt;/classpath&gt;
    &lt;/compile&gt;
    &lt;run-time&gt;
      &lt;jars&gt;*.jar&lt;/jars&gt;
      &lt;classpath pathid="run-time.classpath"&gt;
        &lt;path refid="compile.classpath"/&gt;
        &lt;pathelement path="${run-time.jars}"/&gt;
      &lt;/classpath&gt;
    &lt;/run-time&gt;
  &lt;/root-tag&gt;
</pre>

<h5>default loading (semanticAttributes=true)</h5>
<p>This entry in a build file:
<pre>   &lt;xmlproperty file="somefile.xml" keepRoot="false"
                semanticAttributes="true"/&gt;</pre>
is equivalent to the following entries in a build file:
<pre>
  &lt;property name="version" value="0.0.1"/&gt;
  &lt;property name="build.folder" value="build"/&gt;
  &lt;property name="build.classes" location="${build.folder}/classes" id="build.classes"/&gt;
  &lt;property name="build.reference" refid="build.classes"/&gt;

  &lt;property name="run-time.jars" value="*.jar"/&gt;

  &lt;path id="compile.classpath"&gt;
    &lt;pathelement location="${build.classes}"/&gt;
  &lt;/path&gt;

  &lt;path id="run-time.classpath"&gt;
    &lt;path refid="compile.classpath"/&gt;
    &lt;pathelement path="${run-time.jars}"/&gt;
  &lt;/path&gt;
</pre>

<h5>includeSemanticAttribute="true"</h5>
<p>This entry in a build file:
<pre>   &lt;xmlproperty file="somefile.xml"
                semanticAttributes="true" keepRoot="false"
                includeSemanticAttribute="true"/&gt;
</pre>
is equivalent to the following entries in a build file:
<pre>
  &lt;property name="version.value" value="0.0.1"/&gt;
  &lt;property name="build.folder" value="build"/&gt;
  &lt;property name="build.classes.location" location="${build.folder}/classes"/&gt;
  &lt;property name="build.reference.refid" refid="build.classes"/&gt;

  &lt;property name="run-time.jars" value="*.jar"/&gt;

  &lt;path id="compile.classpath"&gt;
    &lt;pathelement location="${build.classes}"/&gt;
  &lt;/path&gt;

  &lt;path id="run-time.classpath"&gt;
    &lt;path refid="compile.classpath"/&gt;
    &lt;pathelement path="${run-time.jars}"/&gt;
  &lt;/path&gt;
</pre>

</body>
</html>