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-<?xml version="1.0" standalone="no"?>
-<!DOCTYPE document PUBLIC "-//APACHE//DTD Documentation V1.1//EN"
- "http://cvs.apache.org/viewcvs.cgi/*checkout*/xml-forrest/src/resources/schema/dtd/document-v11.dtd">
-<document>
- <header>
- <title>Property Methods Access</title>
- <authors>
- <person id="pbw" name="Peter B. West" email="pbwest@powerup.com.au"/>
- </authors>
- </header>
- <body>
- <section>
- <title>Introduction</title>
- <p>
- The <link href= "property-data.html" >previous section</link>
- discussed the common data elements in the simplest examples of
- &lt;property&gt: classes. This section discusses more complex
- classes whose facilities are accessed only through various
- methods.
- </p>
- </section>
- <section>
- <title>Generating &amp; Accessing Initial Values</title>
-
- <p>
- <fork href= "AutoRestore.html"
- >org.apache.fop.fo.properties.AutoRestore</fork> is an example
- of a the next most complex &lt;property&gt; class. In
- addition to all of the common static fields, these classes
- have initial data value types which require the dynamic
- generation of a PropertyValue instance.
- </p>
-
- <p>
- The method <code >PropertyValue getInitialValue(int)</code >
- returns an instance of PropertyValue of the appropriate
- subclass containing the initial value for this
- &lt;property&gt;. Like the static data fields, this value is,
- in turn, stored in the array of initial values maintained in
- the <fork href= "../PropertyConsts.html" ><code
- >PropertyConsts</code ></fork> singleton <fork href=
- "../PropertyConsts.html#pconsts" ><code >pconsts</code
- ></fork>.` As with the fields, the first invocation of the
- method <fork href= "../PropertyConsts.html#setupProperty"
- ><code >setupProperty</code ></fork> on the property
- instantiates the singleton instance of the class, and stores
- that instance in the in the <fork href=
- "../PropertyConsts.html#properties" ><code >Property[]
- properties</code ></fork> array of <fork href=
- "../PropertyConsts.html#pconsts" ><code >pconsts</code
- ></fork>.
- </p>
-
- <p>
- Unlike the static data fields, however, the initial value is
- not immediately generated. It is generated by a call to <fork
- href= "../PropertyConsts.html#getInitialValue" ><code
- >PropertyValue getInitialValue(int)</code ></fork> in <fork
- href= "../PropertyConsts.html#pconsts" ><code >pconsts</code
- ></fork>. A side-effect of this call is to store the initial
- value in <fork
- href="../PropertyConsts.html#initialValues"><code
- >PropertyValue[] initialValues</code ></fork>.
- </p>
-
- </section>
- </body>
-</document>