docs/org.eclipse.jst.j2ee.doc.user/topics/cfacets.html - gerrit/jeetools/webtools.javaee - Git at Google

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 <title>Project facets</title>
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 <body id="cfacets"><a name="cfacets"><!-- --></a>


 <h1 class="id_title">Project facets</h1>


 <div class="id_conbody"><p class="id_shortdesc">Facets define characteristics and requirements
 for Java EE projects and are used as part of the runtime configuration. </p>

 <p class="anchor_topictop" />

 <p id="cfacets__aboutfacet"><a name="cfacets__aboutfacet"><!-- --></a>When you add a facet to a project, that project is configured
 to perform a certain task, fulfill certain requirements, or have certain characteristics.
 For example, the EAR facet sets up a project to function as an enterprise
 application by adding a deployment descriptor and setting up the project's
 classpath.</p>

 <p>You can add facets only to Java EE projects and other types of projects
 that are based on J2EE projects, such as enterprise application projects,
 dynamic Web projects, and EJB projects. You cannot add facets to a Java™ project
 or plug-in project, for example. Typically, a facet-enabled project has at
 least one facet when it is created, allowing you to add more facets if necessary.
 For example, a new EJB project has the EJB Module facet. You can then add
 other facets to this project like the EJBDoclet (XDoclet) facet. To add a
 facet to a project, see <a href="taddingfacet.html" title="This topic explains how to add a facet&#10;to an existing project in your workspace.">Adding a facet to a Java EE project</a>.</p>

 <p>Some facets require other facets as prerequisites. Other facets cannot
 be in the same project together. For example, you cannot add the Dynamic Web
 Module facet to an EJB project because the EJB project already has the EJB
 Module facet. Some facets can be removed from a project and others cannot.</p>

 <p>Facets also have version numbers. You can change the version numbers of
 facets as long as you stay within the requirements for the facets. To change
 the version number of a facet, see <a href="tchangefacet.html" title="You can change the version of a facet&#10;in a Java EE project by editing the facets for the project.">Changing the version of a facet</a>.</p>

 <p class="anchor_topicbottom" />

 </div>

 <div><div class="relconcepts"><strong>Related concepts</strong><br />
 <div><a href="../topics/cjearproj.html" title="An enterprise application project ties together the resources that are required to deploy a J2EE enterprise application.">Enterprise application projects</a></div>
 </div>
 <div class="reltasks"><strong>Related tasks</strong><br />
 <div><a href="../topics/tjear.html" title="Using the wizard to create an enterprise application project allows you to package many web applications and modules in a project and deploy these modules as a J2EE enterprise application.">Creating an enterprise application project</a></div>
 <div><a href="../topics/tjappproj.html" title="You can use a wizard to create a new application client project and add it to a new or existing enterprise application project.">Creating an application client project</a></div>
 <div><a href="../topics/tjrar.html" title="A connector is a J2EE standard extension mechanism for containers to provide connectivity to enterprise information systems (EISs).">Creating a connector project</a></div>
 <div><a href="../topics/taddingfacet.html" title="This topic explains how to add a facet to an existing project in your workspace.">Adding a facet to a Java EE project</a></div>
 <div><a href="../topics/tchangejavalevel.html" title="You can change the version of Java used in a Java EE project by changing the value of the Java facet.">Changing the Java compiler version for a Java EE project</a></div>
 <div><a href="../topics/tchangefacet.html" title="You can change the version of a facet in a Java EE project by editing the facets for the project.">Changing the version of a facet</a></div>
 </div>
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	<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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	<meta name="DC.Title" content="Project facets" />
	<meta name="abstract" content="Facets define characteristics and requirements for Java EE projects and are used as part of the runtime configuration." />
	<meta name="description" content="Facets define characteristics and requirements for Java EE projects and are used as part of the runtime configuration." />
	<meta content="Java EE, project facets, JavaServer Faces (JSF), projects, facets, overview" name="DC.subject" />
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	<title>Project facets</title>
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	<body id="cfacets"><a name="cfacets"><!-- --></a>


	<h1 class="id_title">Project facets</h1>



	<div class="id_conbody"><p class="id_shortdesc">Facets define characteristics and requirements
	for Java EE projects and are used as part of the runtime configuration. </p>

	<p class="anchor_topictop" />

	<p id="cfacets__aboutfacet"><a name="cfacets__aboutfacet"><!-- --></a>When you add a facet to a project, that project is configured
	to perform a certain task, fulfill certain requirements, or have certain characteristics.
	For example, the EAR facet sets up a project to function as an enterprise
	application by adding a deployment descriptor and setting up the project's
	classpath.</p>

	<p>You can add facets only to Java EE projects and other types of projects
	that are based on J2EE projects, such as enterprise application projects,
	dynamic Web projects, and EJB projects. You cannot add facets to a Java™ project
	or plug-in project, for example. Typically, a facet-enabled project has at
	least one facet when it is created, allowing you to add more facets if necessary.
	For example, a new EJB project has the EJB Module facet. You can then add
	other facets to this project like the EJBDoclet (XDoclet) facet. To add a
	facet to a project, see <a href="taddingfacet.html" title="This topic explains how to add a facet to an existing project in your workspace.">Adding a facet to a Java EE project</a>.</p>

	<p>Some facets require other facets as prerequisites. Other facets cannot
	be in the same project together. For example, you cannot add the Dynamic Web
	Module facet to an EJB project because the EJB project already has the EJB
	Module facet. Some facets can be removed from a project and others cannot.</p>

	<p>Facets also have version numbers. You can change the version numbers of
	facets as long as you stay within the requirements for the facets. To change
	the version number of a facet, see <a href="tchangefacet.html" title="You can change the version of a facet in a Java EE project by editing the facets for the project.">Changing the version of a facet</a>.</p>

	<p class="anchor_topicbottom" />

	</div>

	<div><div class="relconcepts"><strong>Related concepts</strong><br />
	<div><a href="../topics/cjearproj.html" title="An enterprise application project ties together the resources that are required to deploy a J2EE enterprise application.">Enterprise application projects</a></div>
	</div>
	<div class="reltasks"><strong>Related tasks</strong><br />
	<div><a href="../topics/tjear.html" title="Using the wizard to create an enterprise application project allows you to package many web applications and modules in a project and deploy these modules as a J2EE enterprise application.">Creating an enterprise application project</a></div>
	<div><a href="../topics/tjappproj.html" title="You can use a wizard to create a new application client project and add it to a new or existing enterprise application project.">Creating an application client project</a></div>
	<div><a href="../topics/tjrar.html" title="A connector is a J2EE standard extension mechanism for containers to provide connectivity to enterprise information systems (EISs).">Creating a connector project</a></div>
	<div><a href="../topics/taddingfacet.html" title="This topic explains how to add a facet to an existing project in your workspace.">Adding a facet to a Java EE project</a></div>
	<div><a href="../topics/tchangejavalevel.html" title="You can change the version of Java used in a Java EE project by changing the value of the Java facet.">Changing the Java compiler version for a Java EE project</a></div>
	<div><a href="../topics/tchangefacet.html" title="You can change the version of a facet in a Java EE project by editing the facets for the project.">Changing the version of a facet</a></div>
	</div>
	</div>

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