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| javax.xml.xpath</FONT>
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| <BR>
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| Class XPathFactory</H2>
|
| <PRE>
|
| java.lang.Object
|
| |
|
| +--<B>javax.xml.xpath.XPathFactory</B>
|
| </PRE>
|
| <DL>
|
| <DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../org/apache/xpath/jaxp/XPathFactoryImpl.html">XPathFactoryImpl</A></DD>
|
| </DL>
|
| <HR>
|
| <DL>
|
| <DT>public abstract class <B>XPathFactory</B><DT>extends java.lang.Object</DL>
|
|
|
| <P>
|
| <p>An <code>XPathFactory</code> instance can be used to create |
| <A HREF="../../../javax/xml/xpath/XPath.html"><CODE>XPath</CODE></A> objects.</p> |
| |
| <p>See <A HREF="../../../javax/xml/xpath/XPathFactory.html#newInstance(java.lang.String)"><CODE>newInstance(String uri)</CODE></A> for lookup mechanism.</p>
|
| <P>
|
| <DL>
|
| <DT><B>Since: </B><DD>1.5</DD>
|
| </DL>
|
| <HR>
|
|
|
| <P>
|
| <!-- ======== INNER CLASS SUMMARY ======== -->
|
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|
|
|
| <!-- =========== FIELD SUMMARY =========== -->
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|
| <A NAME="field_summary"><!-- --></A> |
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| <TD COLSPAN=2><FONT SIZE="+2">
|
| <B>Field Summary</B></FONT></TD>
|
| </TR>
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| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
| <CODE>static java.lang.String</CODE></FONT></TD>
|
| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFactory.html#DEFAULT_OBJECT_MODEL_URI">DEFAULT_OBJECT_MODEL_URI</A></B></CODE>
|
|
|
| <BR>
|
| Default Object Model URI.</TD>
|
| </TR>
|
| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
| <CODE>static java.lang.String</CODE></FONT></TD>
|
| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFactory.html#DEFAULT_PROPERTY_NAME">DEFAULT_PROPERTY_NAME</A></B></CODE>
|
|
|
| <BR>
|
| The default property name according to the JAXP spec.</TD>
|
| </TR>
|
| </TABLE>
|
|
|
| <!-- ======== CONSTRUCTOR SUMMARY ======== -->
|
|
|
|
|
| <!-- ========== METHOD SUMMARY =========== -->
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|
| <A NAME="method_summary"><!-- --></A> |
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| <TD COLSPAN=2><FONT SIZE="+2">
|
| <B>Method Summary</B></FONT></TD>
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| </TR>
|
| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
| <CODE>abstract boolean</CODE></FONT></TD>
|
| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFactory.html#getFeature(java.lang.String)">getFeature</A></B>(java.lang.String name)</CODE>
|
|
|
| <BR>
|
| Get the state of the named feature.</TD>
|
| </TR>
|
| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
| <CODE>abstract boolean</CODE></FONT></TD>
|
| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFactory.html#isObjectModelSupported(java.lang.String)">isObjectModelSupported</A></B>(java.lang.String objectModel)</CODE>
|
|
|
| <BR>
|
| Is specified object model supported by this <code>XPathFactory</code>?</TD>
|
| </TR>
|
| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
| <CODE>static <A HREF="../../../javax/xml/xpath/XPathFactory.html">XPathFactory</A></CODE></FONT></TD>
|
| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFactory.html#newInstance()">newInstance</A></B>()</CODE>
|
|
|
| <BR>
|
| Get a new <code>XPathFactory</code> instance using the default object model, |
| <A HREF="../../../javax/xml/xpath/XPathFactory.html#DEFAULT_OBJECT_MODEL_URI"><CODE>DEFAULT_OBJECT_MODEL_URI</CODE></A>, |
| the W3C DOM.</TD>
|
| </TR>
|
| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
| <CODE>static <A HREF="../../../javax/xml/xpath/XPathFactory.html">XPathFactory</A></CODE></FONT></TD>
|
| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFactory.html#newInstance(java.lang.String)">newInstance</A></B>(java.lang.String uri)</CODE>
|
|
|
| <BR>
|
| Get a new <code>XPathFactory</code> instance using the specified object model.</TD>
|
| </TR>
|
| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
| <CODE>abstract <A HREF="../../../javax/xml/xpath/XPath.html">XPath</A></CODE></FONT></TD>
|
| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFactory.html#newXPath()">newXPath</A></B>()</CODE>
|
|
|
| <BR>
|
| Return a new <code>XPath</code> using the underlying object |
| model determined when the <code>XPathFactory</code> was instantiated.</TD>
|
| </TR>
|
| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
| <CODE>abstract void</CODE></FONT></TD>
|
| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFactory.html#setFeature(java.lang.String, boolean)">setFeature</A></B>(java.lang.String name, |
| boolean value)</CODE>
|
|
|
| <BR>
|
| Set a feature for this <code>XPathFactory</code> and <code>XPath</code>s created by this factory.</TD>
|
| </TR>
|
| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
| <CODE>abstract void</CODE></FONT></TD>
|
| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFactory.html#setXPathFunctionResolver(javax.xml.xpath.XPathFunctionResolver)">setXPathFunctionResolver</A></B>(<A HREF="../../../javax/xml/xpath/XPathFunctionResolver.html">XPathFunctionResolver</A> resolver)</CODE>
|
|
|
| <BR>
|
| Establish a default function resolver.</TD>
|
| </TR>
|
| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
| <CODE>abstract void</CODE></FONT></TD>
|
| <TD><CODE><B><A HREF="../../../javax/xml/xpath/XPathFactory.html#setXPathVariableResolver(javax.xml.xpath.XPathVariableResolver)">setXPathVariableResolver</A></B>(<A HREF="../../../javax/xml/xpath/XPathVariableResolver.html">XPathVariableResolver</A> resolver)</CODE>
|
|
|
| <BR>
|
| Establish a default variable resolver.</TD>
|
| </TR>
|
| </TABLE>
|
| <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
| <TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
|
| <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
|
| <TD><B>Methods inherited from class java.lang.Object</B></TD>
|
| </TR>
|
| <TR BGCOLOR="white" CLASS="TableRowColor">
|
| <TD><CODE>equals,
|
| getClass,
|
| hashCode,
|
| notify,
|
| notifyAll,
|
| toString,
|
| wait,
|
| wait,
|
| wait</CODE></TD>
|
| </TR>
|
| </TABLE>
|
|
|
| <P>
|
|
|
| <!-- ============ FIELD DETAIL =========== -->
|
|
|
| <A NAME="field_detail"><!-- --></A> |
| <TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
|
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
|
| <TD COLSPAN=1><FONT SIZE="+2">
|
| <B>Field Detail</B></FONT></TD>
|
| </TR>
|
| </TABLE>
|
|
|
| <A NAME="DEFAULT_PROPERTY_NAME"><!-- --></A><H3>
|
| DEFAULT_PROPERTY_NAME</H3>
|
| <PRE>
|
| public static final java.lang.String <B>DEFAULT_PROPERTY_NAME</B></PRE>
|
| <DL>
|
| <DD><p>The default property name according to the JAXP spec.</p></DL>
|
| <HR>
|
|
|
| <A NAME="DEFAULT_OBJECT_MODEL_URI"><!-- --></A><H3>
|
| DEFAULT_OBJECT_MODEL_URI</H3>
|
| <PRE>
|
| public static final java.lang.String <B>DEFAULT_OBJECT_MODEL_URI</B></PRE>
|
| <DL>
|
| <DD><p>Default Object Model URI.</p></DL>
|
|
|
| <!-- ========= CONSTRUCTOR DETAIL ======== -->
|
|
|
|
|
| <!-- ============ METHOD DETAIL ========== -->
|
|
|
| <A NAME="method_detail"><!-- --></A> |
| <TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
|
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
|
| <TD COLSPAN=1><FONT SIZE="+2">
|
| <B>Method Detail</B></FONT></TD>
|
| </TR>
|
| </TABLE>
|
|
|
| <A NAME="newInstance()"><!-- --></A><H3>
|
| newInstance</H3>
|
| <PRE>
|
| public static final <A HREF="../../../javax/xml/xpath/XPathFactory.html">XPathFactory</A> <B>newInstance</B>()</PRE>
|
| <DL>
|
| <DD><p>Get a new <code>XPathFactory</code> instance using the default object model, |
| <A HREF="../../../javax/xml/xpath/XPathFactory.html#DEFAULT_OBJECT_MODEL_URI"><CODE>DEFAULT_OBJECT_MODEL_URI</CODE></A>, |
| the W3C DOM.</p> |
| |
| <p>This method is functionally equivalent to:</p> |
| <pre> |
| newInstance(DEFAULT_OBJECT_MODEL_URI) |
| </pre> |
| |
| <p>Since the implementation for the W3C DOM is always available, this method will never fail.</p><DD><DL>
|
| <DT><B>Returns:</B><DD>Instance of an <code>XPathFactory</code>.</DL>
|
| </DD>
|
| </DL>
|
| <HR>
|
|
|
| <A NAME="newInstance(java.lang.String)"><!-- --></A><H3>
|
| newInstance</H3>
|
| <PRE>
|
| public static final <A HREF="../../../javax/xml/xpath/XPathFactory.html">XPathFactory</A> <B>newInstance</B>(java.lang.String uri) |
| throws <A HREF="../../../javax/xml/xpath/XPathFactoryConfigurationException.html">XPathFactoryConfigurationException</A></PRE>
|
| <DL>
|
| <DD><p>Get a new <code>XPathFactory</code> instance using the specified object model.</p> |
| |
| <p>To find a <code>XPathFactory</code> object, |
| this method looks the following places in the following order where "the class loader" refers to the context class loader:</p> |
| <ol> |
| <li> |
| If the system property <A HREF="../../../javax/xml/xpath/XPathFactory.html#DEFAULT_PROPERTY_NAME"><CODE>DEFAULT_PROPERTY_NAME</CODE></A> + ":uri" is present, |
| where uri is the parameter to this method, then its value is read as a class name. |
| The method will try to create a new instance of this class by using the class loader, |
| and returns it if it is successfully created. |
| </li> |
| <li> |
| ${java.home}/lib/jaxp.properties is read and the value associated with the key being the system property above is looked for. |
| If present, the value is processed just like above. |
| </li> |
| <li> |
| The class loader is asked for service provider provider-configuration files matching <code>javax.xml.xpath.XPathFactory</code> |
| in the resource directory META-INF/services. |
| See the JAR File Specification for file format and parsing rules. |
| Each potential service provider is required to implement the method: |
| <pre> |
| <A HREF="../../../javax/xml/xpath/XPathFactory.html#isObjectModelSupported(java.lang.String)"><CODE>isObjectModelSupported(String objectModel)</CODE></A> |
| </pre> |
| The first service provider found in class loader order that supports the specified object model is returned. |
| </li> |
| <li> |
| Platform default <code>XPathFactory</code> is located in a platform specific way. |
| There must be a platform default XPathFactory for the W3C DOM, i.e. <A HREF="../../../javax/xml/xpath/XPathFactory.html#DEFAULT_OBJECT_MODEL_URI"><CODE>DEFAULT_OBJECT_MODEL_URI</CODE></A>. |
| </li> |
| </ol> |
| <p>If everything fails, an <code>XPathFactoryConfigurationException</code> will be thrown.</p> |
| |
| <p>Tip for Trouble-shooting:</p> |
| <p>See <CODE>Properties.load(java.io.InputStream)</CODE> for exactly how a property file is parsed. |
| In particular, colons ':' need to be escaped in a property file, so make sure the URIs are properly escaped in it. |
| For example:</p> |
| <pre> |
| http\://java.sun.com/jaxp/xpath/dom=org.acme.DomXPathFactory |
| </pre><DD><DL>
|
| <DT><B>Parameters:</B><DD><CODE>uri</CODE> - Identifies the underlying object model. |
| The specification only defines the URI <A HREF="../../../javax/xml/xpath/XPathFactory.html#DEFAULT_OBJECT_MODEL_URI"><CODE>DEFAULT_OBJECT_MODEL_URI</CODE></A>, |
| <code>http://java.sun.com/jaxp/xpath/dom</code> for the W3C DOM, |
| the org.w3c.dom package, and implementations are free to introduce other URIs for other object models.<DT><B>Returns:</B><DD>Instance of an <code>XPathFactory</code>.<DT><B>Throws:</B><DD><A HREF="../../../javax/xml/xpath/XPathFactoryConfigurationException.html">XPathFactoryConfigurationException</A> - If the specified object model is unavailable.<DD>java.lang.NullPointerException - If <code>uri</code> is <code>null</code>.<DD>java.lang.IllegalArgumentException - If <code>uri.length() == 0</code>.</DL>
|
| </DD>
|
| </DL>
|
| <HR>
|
|
|
| <A NAME="isObjectModelSupported(java.lang.String)"><!-- --></A><H3>
|
| isObjectModelSupported</H3>
|
| <PRE>
|
| public abstract boolean <B>isObjectModelSupported</B>(java.lang.String objectModel)</PRE>
|
| <DL>
|
| <DD><p>Is specified object model supported by this <code>XPathFactory</code>?</p><DD><DL>
|
| <DT><B>Parameters:</B><DD><CODE>objectModel</CODE> - Specifies the object model which the returned <code>XPathFactory</code> will understand.<DT><B>Returns:</B><DD><code>true</code> if <code>XPathFactory</code> supports <code>objectModel</code>, else <code>false</code>.<DT><B>Throws:</B><DD>java.lang.NullPointerException - If <code>objectModel</code> is <code>null</code>.<DD>java.lang.IllegalArgumentException - If <code>objectModel.length() == 0</code>.</DL>
|
| </DD>
|
| </DL>
|
| <HR>
|
|
|
| <A NAME="setFeature(java.lang.String, boolean)"><!-- --></A><H3>
|
| setFeature</H3>
|
| <PRE>
|
| public abstract void <B>setFeature</B>(java.lang.String name, |
| boolean value) |
| throws <A HREF="../../../javax/xml/xpath/XPathFactoryConfigurationException.html">XPathFactoryConfigurationException</A></PRE>
|
| <DL>
|
| <DD><p>Set a feature for this <code>XPathFactory</code> and <code>XPath</code>s created by this factory.</p> |
| |
| <p> |
| Feature names are fully qualified <CODE>java.net.URI</CODE>s. |
| Implementations may define their own features. |
| An <A HREF="../../../javax/xml/xpath/XPathFactoryConfigurationException.html"><CODE>XPathFactoryConfigurationException</CODE></A> is thrown if this <code>XPathFactory</code> or the <code>XPath</code>s |
| it creates cannot support the feature. |
| It is possible for an <code>XPathFactory</code> to expose a feature value but be unable to change its state. |
| </p> |
| |
| <p> |
| All implementations are required to support the <A HREF="../../../javax/xml/XMLConstants.html#FEATURE_SECURE_PROCESSING"><CODE>XMLConstants.FEATURE_SECURE_PROCESSING</CODE></A> feature. |
| When the feature is <code>true</code>, any reference to an external function is an error. |
| Under these conditions, the implementation must not call the <A HREF="../../../javax/xml/xpath/XPathFunctionResolver.html"><CODE>XPathFunctionResolver</CODE></A> |
| and must throw an <A HREF="../../../javax/xml/xpath/XPathFunctionException.html"><CODE>XPathFunctionException</CODE></A>. |
| </p><DD><DL>
|
| <DT><B>Parameters:</B><DD><CODE>name</CODE> - Feature name.<DD><CODE>value</CODE> - Is feature state <code>true</code> or <code>false</code>.<DT><B>Throws:</B><DD><A HREF="../../../javax/xml/xpath/XPathFactoryConfigurationException.html">XPathFactoryConfigurationException</A> - if this <code>XPathFactory</code> or the <code>XPath</code>s |
| it creates cannot support this feature.<DD>java.lang.NullPointerException - if <code>name</code> is <code>null</code>.</DL>
|
| </DD>
|
| </DL>
|
| <HR>
|
|
|
| <A NAME="getFeature(java.lang.String)"><!-- --></A><H3>
|
| getFeature</H3>
|
| <PRE>
|
| public abstract boolean <B>getFeature</B>(java.lang.String name) |
| throws <A HREF="../../../javax/xml/xpath/XPathFactoryConfigurationException.html">XPathFactoryConfigurationException</A></PRE>
|
| <DL>
|
| <DD><p>Get the state of the named feature.</p> |
| |
| <p> |
| Feature names are fully qualified <CODE>java.net.URI</CODE>s. |
| Implementations may define their own features. |
| An <A HREF="../../../javax/xml/xpath/XPathFactoryConfigurationException.html"><CODE>XPathFactoryConfigurationException</CODE></A> is thrown if this <code>XPathFactory</code> or the <code>XPath</code>s |
| it creates cannot support the feature. |
| It is possible for an <code>XPathFactory</code> to expose a feature value but be unable to change its state. |
| </p><DD><DL>
|
| <DT><B>Parameters:</B><DD><CODE>name</CODE> - Feature name.<DT><B>Returns:</B><DD>State of the named feature.<DT><B>Throws:</B><DD><A HREF="../../../javax/xml/xpath/XPathFactoryConfigurationException.html">XPathFactoryConfigurationException</A> - if this <code>XPathFactory</code> or the <code>XPath</code>s |
| it creates cannot support this feature.<DD>java.lang.NullPointerException - if <code>name</code> is <code>null</code>.</DL>
|
| </DD>
|
| </DL>
|
| <HR>
|
|
|
| <A NAME="setXPathVariableResolver(javax.xml.xpath.XPathVariableResolver)"><!-- --></A><H3>
|
| setXPathVariableResolver</H3>
|
| <PRE>
|
| public abstract void <B>setXPathVariableResolver</B>(<A HREF="../../../javax/xml/xpath/XPathVariableResolver.html">XPathVariableResolver</A> resolver)</PRE>
|
| <DL>
|
| <DD><p>Establish a default variable resolver.</p> |
| |
| <p>Any <code>XPath</code> objects constructed from this factory will use |
| the specified resolver by default.</p> |
| |
| <p>A <code>NullPointerException</code> is thrown if <code>resolver</code> is <code>null</code>.</p><DD><DL>
|
| <DT><B>Parameters:</B><DD><CODE>resolver</CODE> - Variable resolver.<DT><B>Throws:</B><DD>java.lang.NullPointerException - If <code>resolver</code> is <code>null</code>.</DL>
|
| </DD>
|
| </DL>
|
| <HR>
|
|
|
| <A NAME="setXPathFunctionResolver(javax.xml.xpath.XPathFunctionResolver)"><!-- --></A><H3>
|
| setXPathFunctionResolver</H3>
|
| <PRE>
|
| public abstract void <B>setXPathFunctionResolver</B>(<A HREF="../../../javax/xml/xpath/XPathFunctionResolver.html">XPathFunctionResolver</A> resolver)</PRE>
|
| <DL>
|
| <DD><p>Establish a default function resolver.</p> |
| |
| <p>Any <code>XPath</code> objects constructed from this factory will use |
| the specified resolver by default.</p> |
| |
| <p>A <code>NullPointerException</code> is thrown if <code>resolver</code> is <code>null</code>.</p><DD><DL>
|
| <DT><B>Parameters:</B><DD><CODE>resolver</CODE> - XPath function resolver.<DT><B>Throws:</B><DD>java.lang.NullPointerException - If <code>resolver</code> is <code>null</code>.</DL>
|
| </DD>
|
| </DL>
|
| <HR>
|
|
|
| <A NAME="newXPath()"><!-- --></A><H3>
|
| newXPath</H3>
|
| <PRE>
|
| public abstract <A HREF="../../../javax/xml/xpath/XPath.html">XPath</A> <B>newXPath</B>()</PRE>
|
| <DL>
|
| <DD><p>Return a new <code>XPath</code> using the underlying object |
| model determined when the <code>XPathFactory</code> was instantiated.</p><DD><DL>
|
| <DT><B>Returns:</B><DD>New instance of an <code>XPath</code>.</DL>
|
| </DD>
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