http://www.jboss.org/jboss-servlet-api_4.0_spec: The Java Servlet 4.0 API classes (JBoss by Red Hat) 
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package javax.servlet.descriptor;

import java.util.Collection;


This interface provides access to the
<jsp-property-group>
related configuration of a web application.

The configuration is aggregated from the web.xml and
web-fragment.xml descriptor files of the web application.

Since:Servlet 3.0
/**
 * This interface provides access to the
 * <code>&lt;jsp-property-group&gt;</code>
 * related configuration of a web application.
 *
 * <p>The configuration is aggregated from the <code>web.xml</code> and
 * <code>web-fragment.xml</code> descriptor files of the web application.
 *
 * @since Servlet 3.0
 */
public interface JspPropertyGroupDescriptor {
    
    
Gets the URL patterns of the JSP property group represented by this
JspPropertyGroupDescriptor.

Any changes to the returned Collection must not 
affect this JspPropertyGroupDescriptor.

Returns:a (possibly empty) Collection of the URL
patterns of the JSP property group represented by this
JspPropertyGroupDescriptor
/**
     * Gets the URL patterns of the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>.
     *
     * <p>Any changes to the returned <code>Collection</code> must not 
     * affect this <code>JspPropertyGroupDescriptor</code>.
     *
     * @return a (possibly empty) <code>Collection</code> of the URL
     * patterns of the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>
     */
    public Collection<String> getUrlPatterns();

    
Gets the value of the el-ignored configuration, which
specifies whether Expression Language (EL) evaluation is enabled for
any JSP pages mapped to the JSP property group represented by this
JspPropertyGroupDescriptor.

Returns:the value of the el-ignored configuration, or
null if unspecified
/**
     * Gets the value of the <code>el-ignored</code> configuration, which
     * specifies whether Expression Language (EL) evaluation is enabled for
     * any JSP pages mapped to the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>.
     *
     * @return the value of the <code>el-ignored</code> configuration, or
     * null if unspecified
     */
    public String getElIgnored();

    
Gets the value of the page-encoding configuration,
which specifies the default page encoding for any JSP pages mapped
to the JSP property group represented by this
JspPropertyGroupDescriptor.

Returns:the value of the page-encoding configuration, or
null if unspecified
/**
     * Gets the value of the <code>page-encoding</code> configuration,
     * which specifies the default page encoding for any JSP pages mapped
     * to the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>.
     *
     * @return the value of the <code>page-encoding</code> configuration, or
     * null if unspecified
     */
    public String getPageEncoding();

    
Gets the value of the scripting-invalid configuration,
which specifies whether scripting is enabled for any JSP pages mapped
to the JSP property group represented by this
JspPropertyGroupDescriptor.

Returns:the value of the scripting-invalid configuration,
or null if unspecified
/**
     * Gets the value of the <code>scripting-invalid</code> configuration,
     * which specifies whether scripting is enabled for any JSP pages mapped
     * to the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>.
     *
     * @return the value of the <code>scripting-invalid</code> configuration,
     * or null if unspecified
     */
    public String getScriptingInvalid();

    
Gets the value of the is-xml configuration, which 
specifies whether any JSP pages mapped to the JSP property group
represented by this JspPropertyGroupDescriptor will
be treated as JSP documents (XML syntax).

Returns:the value of the is-xml configuration, or
null if unspecified
/**
     * Gets the value of the <code>is-xml</code> configuration, which 
     * specifies whether any JSP pages mapped to the JSP property group
     * represented by this <code>JspPropertyGroupDescriptor</code> will
     * be treated as JSP documents (XML syntax).
     *
     * @return the value of the <code>is-xml</code> configuration, or
     * null if unspecified
     */
    public String getIsXml();

    
Gets the include-prelude configuration
of the JSP property group represented by this
JspPropertyGroupDescriptor.

Any changes to the returned Collection must not 
affect this JspPropertyGroupDescriptor.

Returns:a (possibly empty) Collection of the
include-prelude configuration of
the JSP property group represented by this
JspPropertyGroupDescriptor
/**
     * Gets the <code>include-prelude</code> configuration
     * of the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>.
     *
     * <p>Any changes to the returned <code>Collection</code> must not 
     * affect this <code>JspPropertyGroupDescriptor</code>.
     *
     * @return a (possibly empty) <code>Collection</code> of the
     * <code>include-prelude</code> configuration of
     * the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>
     */
    public Collection<String> getIncludePreludes();

    
Gets the include-coda configuration
of the JSP property group represented by this
JspPropertyGroupDescriptor.

Any changes to the returned Collection must not 
affect this JspPropertyGroupDescriptor.

Returns:a (possibly empty) Collection of the
include-coda configuration of
the JSP property group represented by this
JspPropertyGroupDescriptor
/**
     * Gets the <code>include-coda</code> configuration
     * of the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>.
     *
     * <p>Any changes to the returned <code>Collection</code> must not 
     * affect this <code>JspPropertyGroupDescriptor</code>.
     *
     * @return a (possibly empty) <code>Collection</code> of the
     * <code>include-coda</code> configuration of
     * the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>
     */
    public Collection<String> getIncludeCodas();

    
Gets the value of the
deferred-syntax-allowed-as-literal configuration, which
specifies whether the character sequence "#{",
which is normally reserved for Expression Language (EL) expressions,
will cause a translation error if it appears as a String literal
in any JSP pages mapped to the JSP property group represented by
this JspPropertyGroupDescriptor.

Returns:the value of the
deferred-syntax-allowed-as-literal configuration, or
null if unspecified
/**
     * Gets the value of the
     * <code>deferred-syntax-allowed-as-literal</code> configuration, which
     * specifies whether the character sequence <code>&quot;#{&quot;</code>,
     * which is normally reserved for Expression Language (EL) expressions,
     * will cause a translation error if it appears as a String literal
     * in any JSP pages mapped to the JSP property group represented by
     * this <code>JspPropertyGroupDescriptor</code>.
     *
     * @return the value of the
     * <code>deferred-syntax-allowed-as-literal</code> configuration, or
     * null if unspecified
     */
    public String getDeferredSyntaxAllowedAsLiteral();

    
Gets the value of the trim-directive-whitespaces
configuration, which specifies whether template text containing only
whitespaces must be removed from the response output of any JSP
pages mapped to the JSP property group represented by this
JspPropertyGroupDescriptor.

Returns:the value of the trim-directive-whitespaces
configuration, or null if unspecified
/**
     * Gets the value of the <code>trim-directive-whitespaces</code>
     * configuration, which specifies whether template text containing only
     * whitespaces must be removed from the response output of any JSP
     * pages mapped to the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>.
     *
     * @return the value of the <code>trim-directive-whitespaces</code>
     * configuration, or null if unspecified
     */
    public String getTrimDirectiveWhitespaces();

    
Gets the value of the default-content-type configuration,
which specifies the default response content type for any JSP pages
mapped to the JSP property group represented by this
JspPropertyGroupDescriptor.

Returns:the value of the default-content-type
configuration, or null if unspecified
/**
     * Gets the value of the <code>default-content-type</code> configuration,
     * which specifies the default response content type for any JSP pages
     * mapped to the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>.
     *
     * @return the value of the <code>default-content-type</code>
     * configuration, or null if unspecified
     */
    public String getDefaultContentType();

    
Gets the value of the buffer configuration, which
specifies the default size of the response buffer for any JSP pages
mapped to the JSP property group represented by this
JspPropertyGroupDescriptor.

Returns:the value of the buffer configuration, or
null if unspecified
/**
     * Gets the value of the <code>buffer</code> configuration, which
     * specifies the default size of the response buffer for any JSP pages
     * mapped to the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>.
     *
     * @return the value of the <code>buffer</code> configuration, or
     * null if unspecified
     */
    public String getBuffer();

    
Gets the value of the error-on-undeclared-namespace
configuration, which specifies whether an error will be raised at
translation time if tag with an undeclared namespace is used in
any JSP pages mapped to the JSP property group represented by this
JspPropertyGroupDescriptor.

Returns:the value of the error-on-undeclared-namespace
configuration, or null if unspecified
/**
     * Gets the value of the <code>error-on-undeclared-namespace</code>
     * configuration, which specifies whether an error will be raised at
     * translation time if tag with an undeclared namespace is used in
     * any JSP pages mapped to the JSP property group represented by this
     * <code>JspPropertyGroupDescriptor</code>.
     *
     * @return the value of the <code>error-on-undeclared-namespace</code>
     * configuration, or null if unspecified
     */
    public String getErrorOnUndeclaredNamespace();
}