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/*
* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
*
* This software is open source.
* See the bottom of this file for the licence.
*/
package org.dom4j;
import org.jaxen.FunctionContext;
import org.jaxen.NamespaceContext;
import org.jaxen.VariableContext;
import java.util.List;
import java.util.Map;
/**
* XPath represents an XPath expression after it has been parsed
* from a String.
*
* @author James Strachan
* @version $Revision: 1.20 $
*/
public interface XPath extends NodeFilter {
/**
* getText will return the textual version of the XPath
* expression.
*
* @return the textual format of the XPath expression.
*/
String getText();
/**
* matches returns true if the given node matches the XPath
* expression. To be more precise when evaluating this XPath expression on
* the given node the result set must include the node.
*
* @param node DOCUMENT ME!
* @return true if the given node matches this XPath expression
*/
boolean matches(Node node);
/**
* evaluate evaluates an XPath expression and returns the
* result as an {@link Object}. The object returned can either be a {@link
* List} of {@link Node}instances, a {@link Node}instance, a {@link
* String} or a {@link Number}instance depending on the XPath expression.
*
* @param context is either a node or a list of nodes on which to evalute the
* XPath
* @return the value of the XPath expression as a {@link List}of {@link
* Node} instances, a {@link Node}instance, a {@link String}or a
* {@link Number}instance depending on the XPath expression.
*/
Object evaluate(Object context);
/**
* selectObject evaluates an XPath expression and returns the
* result as an {@link Object}. The object returned can either be a {@link
* List} of {@link Node}instances, a {@link Node}instance, a {@link
* String} or a {@link Number}instance depending on the XPath expression.
*
* @param context is either a node or a list of nodes on which to evalute the
* XPath
* @return the value of the XPath expression as a {@link List}of {@link
* Node} instances, a {@link Node}instance, a {@link String}or a
* {@link Number}instance depending on the XPath expression.
* @deprecated please use evaluate(Object) instead. WILL BE REMOVED IN
* dom4j-1.6 !!
*/
Object selectObject(Object context);
/**
* selectNodes performs this XPath expression on the given
* {@link Node}or {@link List}of {@link Node}s instances appending all
* the results together into a single list.
*
* @param context is either a node or a list of nodes on which to evalute the
* XPath
* @return the results of all the XPath evaluations as a single list
*/
List selectNodes(Object context);
/**
* selectNodes evaluates the XPath expression on the given
* {@link Node}or {@link List}of {@link Node}s and returns the result as
* a List of Node s sorted by the sort XPath
* expression.
*
* @param context is either a node or a list of nodes on which to evalute the
* XPath
* @param sortXPath is the XPath expression to sort by
* @return a list of Node instances
*/
List selectNodes(Object context, XPath sortXPath);
/**
* selectNodes evaluates the XPath expression on the given
* {@link Node}or {@link List}of {@link Node}s and returns the result as
* a List of Node s sorted by the sort XPath
* expression.
*
* @param context is either a node or a list of nodes on which to evalute the
* XPath
* @param sortXPath is the XPath expression to sort by
* @param distinct specifies whether or not duplicate values of the sort
* expression are allowed. If this parameter is true then only
* distinct sort expressions values are included in the result
* @return a list of Node instances
*/
List selectNodes(Object context, XPath sortXPath, boolean distinct);
/**
* selectSingleNode evaluates this XPath expression on the
* given {@link Node}or {@link List}of {@link Node}s and returns the
* result as a single Node instance.
*
* @param context is either a node or a list of nodes on which to evalute the
* XPath
* @return a single matching Node instance
*/
Node selectSingleNode(Object context);
/**
* valueOf evaluates this XPath expression and returns the
* textual representation of the results using the XPath string() function.
*
* @param context is either a node or a list of nodes on which to evalute the
* XPath
* @return the string representation of the results of the XPath expression
*/
String valueOf(Object context);
/**
* numberValueOf evaluates an XPath expression and returns
* the numeric value of the XPath expression if the XPath expression results
* is a number, or null if the result is not a number.
*
* @param context is either a node or a list of nodes on which to evalute the
* XPath
* @return the numeric result of the XPath expression or null if the result
* is not a number.
*/
Number numberValueOf(Object context);
/**
* Retrieve a boolean-value interpretation of this XPath expression when
* evaluated against a given context.
*
* The boolean-value of the expression is determined per the
* boolean(..) core function as defined in the XPath
* specification. This means that an expression that selects zero nodes will
* return false, while an expression that selects
* one-or-more nodes will return true.
*
* @param context The node, nodeset or Context object for evaluation. This value
* can be null
* @return The boolean-value interpretation of this expression.
* @since 1.5
*/
boolean booleanValueOf(Object context);
/**
* sort sorts the given List of Nodes using this XPath
* expression as a {@link java.util.Comparator}.
*
* @param list is the list of Nodes to sort
*/
void sort(List list);
/**
* sort sorts the given List of Nodes using this XPath
* expression as a {@link java.util.Comparator}and optionally removing
* duplicates.
*
* @param list is the list of Nodes to sort
* @param distinct if true then duplicate values (using the sortXPath for
* comparisions) will be removed from the List
*/
void sort(List list, boolean distinct);
/**
* DOCUMENT ME!
*
* @return the current function context
*/
FunctionContext getFunctionContext();
/**
* Sets the function context to be used when evaluating XPath expressions
*
* @param functionContext DOCUMENT ME!
*/
void setFunctionContext(FunctionContext functionContext);
/**
* DOCUMENT ME!
*
* @return the current namespace context
*/
NamespaceContext getNamespaceContext();
/**
* Sets the namespace context to be used when evaluating XPath expressions
*
* @param namespaceContext DOCUMENT ME!
*/
void setNamespaceContext(NamespaceContext namespaceContext);
/**
* Sets the current NamespaceContext from a Map where the keys are the
* String namespace prefixes and the values are the namespace URIs.
*
* For example:
*
*
* @param map the map containing the namespace mappings
*/
void setNamespaceURIs(Map map);
/**
* DOCUMENT ME!
*
* @return the current variable context
*/
VariableContext getVariableContext();
/**
* Sets the variable context to be used when evaluating XPath expressions
*
* @param variableContext DOCUMENT ME!
*/
void setVariableContext(VariableContext variableContext);
}
/*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and
* notices. Redistributions must also contain a copy of this document.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name "DOM4J" must not be used to endorse or promote products derived
* from this Software without prior written permission of MetaStuff, Ltd. For
* written permission, please contact [email protected].
*
* 4. Products derived from this Software may not be called "DOM4J" nor may
* "DOM4J" appear in their names without prior written permission of MetaStuff,
* Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
*
* 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
*
* THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
*/
