bundles/org.eclipse.jdt.doc.user/concepts/concept-access-rules.htm - platform/eclipse.platform.common - Git at Google

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     <h1>Access Rules</h1>

     Access rules can be added to build classpath entries to specify which types in the given entry
     can be accessed and which not. If the compiler detects a type access to a type that should not be
     accessed, it will create a problem marker.
     <ul>
     <li>Non-accessible rules define types that must not be referenced. The compiler typically creates an error marker for accesses to these types.</li>
     <li>Discouraged rules define types that should not be referenced. The compiler typically creates a warning marker for accesses to these types.</li>
     <li>Accessible rules define types that can be referenced.</li>
     </ul>
     Each rule consist of a pattern (same format as ANT patterns) and one of the rule types listed above.<br>
     Each classpath entry can have any number of rules defined. The compiler will process the list in the order
     defined and take the first matching rule. <br><br>
     The severity of the problem marker generated for accesses to 'Non-accessible' and 'Discouraged' type can be configured
     on the Java compiler's <a href="../reference/preferences/java/compiler/ref-preferences-errors-warnings.htm">Error/Warnings</a> preference page.

     <p><img border="0" src="../images/ngrelc.png" alt="Related concepts" ></p>
     <p>
      <a href="concept-java-builder.htm">Java builder</a><br>
      <a href="concept-classpath-variables.htm">Classpath variable</a><br>
      <a href="concept-inclusion-exclusion-patterns.htm">Inclusion and exclusion patterns</a><br>
      <a href="concept-access-rules.htm">Access rules</a>    </p>

     <p><img src="../images/ngrelr.png" alt="Related reference" border="0" >
     </p>
     <p>
      <a href="../reference/ref-properties-build-path.htm">Java build path properties</a><br>
      <a href="../reference/preferences/java/compiler/ref-preferences-errors-warnings.htm">Error/Warnings preference page</a>
     </p>

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	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">

	<html>
	<head>
	<meta name="copyright" content="Copyright (c) IBM Corporation and others 2000, 2008. This page is made available under license. For full details see the LEGAL in the documentation book that contains this page." >
	<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
	<meta http-equiv="Content-Style-Type" content="text/css">
	<link rel="stylesheet" href="../book.css" charset="ISO-8859-1" type="text/css">

	<title>Access Rules</title>
	</head>

	<body>
	<h1>Access Rules</h1>

	Access rules can be added to build classpath entries to specify which types in the given entry
	can be accessed and which not. If the compiler detects a type access to a type that should not be
	accessed, it will create a problem marker.
	<ul>
	<li>Non-accessible rules define types that must not be referenced. The compiler typically creates an error marker for accesses to these types.</li>
	<li>Discouraged rules define types that should not be referenced. The compiler typically creates a warning marker for accesses to these types.</li>
	<li>Accessible rules define types that can be referenced.</li>
	</ul>
	Each rule consist of a pattern (same format as ANT patterns) and one of the rule types listed above.<br>
	Each classpath entry can have any number of rules defined. The compiler will process the list in the order
	defined and take the first matching rule. <br><br>
	The severity of the problem marker generated for accesses to 'Non-accessible' and 'Discouraged' type can be configured
	on the Java compiler's <a href="../reference/preferences/java/compiler/ref-preferences-errors-warnings.htm">Error/Warnings</a> preference page.

	<p><img border="0" src="../images/ngrelc.png" alt="Related concepts" ></p>
	<p>
	<a href="concept-java-builder.htm">Java builder</a><br>
	<a href="concept-classpath-variables.htm">Classpath variable</a><br>
	<a href="concept-inclusion-exclusion-patterns.htm">Inclusion and exclusion patterns</a><br>
	<a href="concept-access-rules.htm">Access rules</a> </p>

	<p><img src="../images/ngrelr.png" alt="Related reference" border="0" >
	</p>
	<p>
	<a href="../reference/ref-properties-build-path.htm">Java build path properties</a><br>
	<a href="../reference/preferences/java/compiler/ref-preferences-errors-warnings.htm">Error/Warnings preference page</a>
	</p>

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