本文整理汇总了Java中com.sun.org.apache.xpath.internal.XPathContext.popCurrentNode方法的典型用法代码示例。如果您正苦于以下问题:Java XPathContext.popCurrentNode方法的具体用法?Java XPathContext.popCurrentNode怎么用?Java XPathContext.popCurrentNode使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类com.sun.org.apache.xpath.internal.XPathContext
的用法示例。
在下文中一共展示了XPathContext.popCurrentNode方法的10个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: getMatchScore
import com.sun.org.apache.xpath.internal.XPathContext; //导入方法依赖的package包/类
/**
* Get the match score of the given node.
*
* @param xctxt The XPath runtime context.
* @param context The node to be tested.
*
* @return {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NODETEST},
* {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NONE},
* {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NSWILD},
* {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_QNAME}, or
* {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_OTHER}.
*
* @throws javax.xml.transform.TransformerException
*/
public double getMatchScore(XPathContext xctxt, int context)
throws javax.xml.transform.TransformerException
{
xctxt.pushCurrentNode(context);
xctxt.pushCurrentExpressionNode(context);
try
{
XObject score = execute(xctxt);
return score.num();
}
finally
{
xctxt.popCurrentNode();
xctxt.popCurrentExpressionNode();
}
// return XPath.MATCH_SCORE_NONE;
}
示例2: executeRelativePathPattern
import com.sun.org.apache.xpath.internal.XPathContext; //导入方法依赖的package包/类
/**
* Execute the match pattern step relative to another step.
*
*
* @param xctxt The XPath runtime context.
* @param dtm The DTM of the current node.
* @param currentNode The current node context.
*
* @return {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NODETEST},
* {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NONE},
* {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NSWILD},
* {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_QNAME}, or
* {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_OTHER}.
*
* @throws javax.xml.transform.TransformerException
*/
protected final XObject executeRelativePathPattern(
XPathContext xctxt, DTM dtm, int currentNode)
throws javax.xml.transform.TransformerException
{
XObject score = NodeTest.SCORE_NONE;
int context = currentNode;
DTMAxisTraverser traverser;
traverser = dtm.getAxisTraverser(m_axis);
for (int relative = traverser.first(context); DTM.NULL != relative;
relative = traverser.next(context, relative))
{
try
{
xctxt.pushCurrentNode(relative);
score = execute(xctxt);
if (score != NodeTest.SCORE_NONE)
break;
}
finally
{
xctxt.popCurrentNode();
}
}
return score;
}
示例3: acceptNode
import com.sun.org.apache.xpath.internal.XPathContext; //导入方法依赖的package包/类
/**
* Test whether a specified node is visible in the logical view of a
* TreeWalker or NodeIterator. This function will be called by the
* implementation of TreeWalker and NodeIterator; it is not intended to
* be called directly from user code.
* @param n The node to check to see if it passes the filter or not.
* @return a constant to determine whether the node is accepted,
* rejected, or skipped, as defined above .
*/
public short acceptNode(int n)
{
XPathContext xctxt = getXPathContext();
try
{
xctxt.pushCurrentNode(n);
for (int i = 0; i < m_nodeTests.length; i++)
{
PredicatedNodeTest pnt = m_nodeTests[i];
XObject score = pnt.execute(xctxt, n);
if (score != NodeTest.SCORE_NONE)
{
// Note that we are assuming there are no positional predicates!
if (pnt.getPredicateCount() > 0)
{
if (pnt.executePredicates(n, xctxt))
return DTMIterator.FILTER_ACCEPT;
}
else
return DTMIterator.FILTER_ACCEPT;
}
}
}
catch (javax.xml.transform.TransformerException se)
{
// TODO: Fix this.
throw new RuntimeException(se.getMessage());
}
finally
{
xctxt.popCurrentNode();
}
return DTMIterator.FILTER_SKIP;
}
示例4: acceptNode
import com.sun.org.apache.xpath.internal.XPathContext; //导入方法依赖的package包/类
/**
* Test whether a specified node is visible in the logical view of a
* TreeWalker or NodeIterator. This function will be called by the
* implementation of TreeWalker and NodeIterator; it is not intended to
* be called directly from user code.
* @param n The node to check to see if it passes the filter or not.
* @return a constant to determine whether the node is accepted,
* rejected, or skipped, as defined above .
*/
public short acceptNode(int n)
{
XPathContext xctxt = m_lpi.getXPathContext();
try
{
xctxt.pushCurrentNode(n);
XObject score = execute(xctxt, n);
// System.out.println("\n::acceptNode - score: "+score.num()+"::");
if (score != NodeTest.SCORE_NONE)
{
if (getPredicateCount() > 0)
{
countProximityPosition(0);
if (!executePredicates(n, xctxt))
return DTMIterator.FILTER_SKIP;
}
return DTMIterator.FILTER_ACCEPT;
}
}
catch (javax.xml.transform.TransformerException se)
{
// TODO: Fix this.
throw new RuntimeException(se.getMessage());
}
finally
{
xctxt.popCurrentNode();
}
return DTMIterator.FILTER_SKIP;
}
示例5: max
import com.sun.org.apache.xpath.internal.XPathContext; //导入方法依赖的package包/类
/**
* The dyn:max function calculates the maximum value for the nodes passed as
* the first argument, where the value of each node is calculated dynamically
* using an XPath expression passed as a string as the second argument.
* <p>
* The expressions are evaluated relative to the nodes passed as the first argument.
* In other words, the value for each node is calculated by evaluating the XPath
* expression with all context information being the same as that for the call to
* the dyn:max function itself, except for the following:
* <p>
* <ul>
* <li>the context node is the node whose value is being calculated.</li>
* <li>the context position is the position of the node within the node set passed as
* the first argument to the dyn:max function, arranged in document order.</li>
* <li>the context size is the number of nodes passed as the first argument to the
* dyn:max function.</li>
* </ul>
* <p>
* The dyn:max function returns the maximum of these values, calculated in exactly
* the same way as for math:max.
* <p>
* If the expression string passed as the second argument is an invalid XPath
* expression (including an empty string), this function returns NaN.
* <p>
* This function must take a second argument. To calculate the maximum of a set of
* nodes based on their string values, you should use the math:max function.
*
* @param myContext The ExpressionContext passed by the extension processor
* @param nl The node set
* @param expr The expression string
*
* @return The maximum evaluation value
*/
public static double max(ExpressionContext myContext, NodeList nl, String expr)
throws SAXNotSupportedException
{
XPathContext xctxt = null;
if (myContext instanceof XPathContext.XPathExpressionContext)
xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();
else
throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext }));
if (expr == null || expr.length() == 0)
return Double.NaN;
NodeSetDTM contextNodes = new NodeSetDTM(nl, xctxt);
xctxt.pushContextNodeList(contextNodes);
double maxValue = - Double.MAX_VALUE;
for (int i = 0; i < contextNodes.getLength(); i++)
{
int contextNode = contextNodes.item(i);
xctxt.pushCurrentNode(contextNode);
double result = 0;
try
{
XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),
xctxt.getNamespaceContext(),
XPath.SELECT);
result = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext()).num();
}
catch (TransformerException e)
{
xctxt.popCurrentNode();
xctxt.popContextNodeList();
return Double.NaN;
}
xctxt.popCurrentNode();
if (result > maxValue)
maxValue = result;
}
xctxt.popContextNodeList();
return maxValue;
}
示例6: min
import com.sun.org.apache.xpath.internal.XPathContext; //导入方法依赖的package包/类
/**
* The dyn:min function calculates the minimum value for the nodes passed as the
* first argument, where the value of each node is calculated dynamically using
* an XPath expression passed as a string as the second argument.
* <p>
* The expressions are evaluated relative to the nodes passed as the first argument.
* In other words, the value for each node is calculated by evaluating the XPath
* expression with all context information being the same as that for the call to
* the dyn:min function itself, except for the following:
* <p>
* <ul>
* <li>the context node is the node whose value is being calculated.</li>
* <li>the context position is the position of the node within the node set passed
* as the first argument to the dyn:min function, arranged in document order.</li>
* <li>the context size is the number of nodes passed as the first argument to the
* dyn:min function.</li>
* </ul>
* <p>
* The dyn:min function returns the minimum of these values, calculated in exactly
* the same way as for math:min.
* <p>
* If the expression string passed as the second argument is an invalid XPath expression
* (including an empty string), this function returns NaN.
* <p>
* This function must take a second argument. To calculate the minimum of a set of
* nodes based on their string values, you should use the math:min function.
*
* @param myContext The ExpressionContext passed by the extension processor
* @param nl The node set
* @param expr The expression string
*
* @return The minimum evaluation value
*/
public static double min(ExpressionContext myContext, NodeList nl, String expr)
throws SAXNotSupportedException
{
XPathContext xctxt = null;
if (myContext instanceof XPathContext.XPathExpressionContext)
xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();
else
throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext }));
if (expr == null || expr.length() == 0)
return Double.NaN;
NodeSetDTM contextNodes = new NodeSetDTM(nl, xctxt);
xctxt.pushContextNodeList(contextNodes);
double minValue = Double.MAX_VALUE;
for (int i = 0; i < nl.getLength(); i++)
{
int contextNode = contextNodes.item(i);
xctxt.pushCurrentNode(contextNode);
double result = 0;
try
{
XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),
xctxt.getNamespaceContext(),
XPath.SELECT);
result = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext()).num();
}
catch (TransformerException e)
{
xctxt.popCurrentNode();
xctxt.popContextNodeList();
return Double.NaN;
}
xctxt.popCurrentNode();
if (result < minValue)
minValue = result;
}
xctxt.popContextNodeList();
return minValue;
}
示例7: getProximityPosition
import com.sun.org.apache.xpath.internal.XPathContext; //导入方法依赖的package包/类
/**
* Get the current sub-context position. In order to do the
* reverse axes count, for the moment this re-searches the axes
* up to the predicate. An optimization on this is to cache
* the nodes searched, but, for the moment, this case is probably
* rare enough that the added complexity isn't worth it.
*
* @param predicateIndex The predicate index of the proximity position.
*
* @return The pridicate index, or -1.
*/
protected int getProximityPosition(int predicateIndex)
{
if(!isReverseAxes())
return super.getProximityPosition(predicateIndex);
// A negative predicate index seems to occur with
// (preceding-sibling::*|following-sibling::*)/ancestor::*[position()]/*[position()]
// -sb
if(predicateIndex < 0)
return -1;
if (m_proximityPositions[predicateIndex] <= 0)
{
XPathContext xctxt = getXPathContext();
try
{
OneStepIterator clone = (OneStepIterator) this.clone();
int root = getRoot();
xctxt.pushCurrentNode(root);
clone.setRoot(root, xctxt);
// clone.setPredicateCount(predicateIndex);
clone.m_predCount = predicateIndex;
// Count 'em all
int count = 1;
int next;
while (DTM.NULL != (next = clone.nextNode()))
{
count++;
}
m_proximityPositions[predicateIndex] += count;
}
catch (CloneNotSupportedException cnse)
{
// can't happen
}
finally
{
xctxt.popCurrentNode();
}
}
return m_proximityPositions[predicateIndex];
}
示例8: getLength
import com.sun.org.apache.xpath.internal.XPathContext; //导入方法依赖的package包/类
/**
* The number of nodes in the list. The range of valid child node indices
* is 0 to <code>length-1</code> inclusive.
*
* @return The number of nodes in the list, always greater or equal to zero.
*/
public int getLength()
{
if(!isReverseAxes())
return super.getLength();
// Tell if this is being called from within a predicate.
boolean isPredicateTest = (this == m_execContext.getSubContextList());
// And get how many total predicates are part of this step.
int predCount = getPredicateCount();
// If we have already calculated the length, and the current predicate
// is the first predicate, then return the length. We don't cache
// the anything but the length of the list to the first predicate.
if (-1 != m_length && isPredicateTest && m_predicateIndex < 1)
return m_length;
int count = 0;
XPathContext xctxt = getXPathContext();
try
{
OneStepIterator clone = (OneStepIterator) this.cloneWithReset();
int root = getRoot();
xctxt.pushCurrentNode(root);
clone.setRoot(root, xctxt);
clone.m_predCount = m_predicateIndex;
int next;
while (DTM.NULL != (next = clone.nextNode()))
{
count++;
}
}
catch (CloneNotSupportedException cnse)
{
// can't happen
}
finally
{
xctxt.popCurrentNode();
}
if (isPredicateTest && m_predicateIndex < 1)
m_length = count;
return count;
}
示例9: acceptNode
import com.sun.org.apache.xpath.internal.XPathContext; //导入方法依赖的package包/类
/**
* Test whether a specified node is visible in the logical view of a
* TreeWalker or NodeIterator. This function will be called by the
* implementation of TreeWalker and NodeIterator; it is not intended to
* be called directly from user code.
* @param n The node to check to see if it passes the filter or not.
* @return a constant to determine whether the node is accepted,
* rejected, or skipped, as defined above .
*/
public short acceptNode(int n, XPathContext xctxt)
{
try
{
xctxt.pushCurrentNode(n);
xctxt.pushIteratorRoot(m_context);
if(DEBUG)
{
System.out.println("traverser: "+m_traverser);
System.out.print("node: "+n);
System.out.println(", "+m_cdtm.getNodeName(n));
// if(m_cdtm.getNodeName(n).equals("near-east"))
System.out.println("pattern: "+m_pattern.toString());
m_pattern.debugWhatToShow(m_pattern.getWhatToShow());
}
XObject score = m_pattern.execute(xctxt);
if(DEBUG)
{
// System.out.println("analysis: "+Integer.toBinaryString(m_analysis));
System.out.println("score: "+score);
System.out.println("skip: "+(score == NodeTest.SCORE_NONE));
}
// System.out.println("\n::acceptNode - score: "+score.num()+"::");
return (score == NodeTest.SCORE_NONE) ? DTMIterator.FILTER_SKIP
: DTMIterator.FILTER_ACCEPT;
}
catch (javax.xml.transform.TransformerException se)
{
// TODO: Fix this.
throw new RuntimeException(se.getMessage());
}
finally
{
xctxt.popCurrentNode();
xctxt.popIteratorRoot();
}
}
示例10: executeFilterExpr
import com.sun.org.apache.xpath.internal.XPathContext; //导入方法依赖的package包/类
/**
* Execute the expression. Meant for reuse by other FilterExpr iterators
* that are not derived from this object.
*/
public static XNodeSet executeFilterExpr(int context, XPathContext xctxt,
PrefixResolver prefixResolver,
boolean isTopLevel,
int stackFrame,
Expression expr )
throws com.sun.org.apache.xml.internal.utils.WrappedRuntimeException
{
PrefixResolver savedResolver = xctxt.getNamespaceContext();
XNodeSet result = null;
try
{
xctxt.pushCurrentNode(context);
xctxt.setNamespaceContext(prefixResolver);
// The setRoot operation can take place with a reset operation,
// and so we may not be in the context of LocPathIterator#nextNode,
// so we have to set up the variable context, execute the expression,
// and then restore the variable context.
if (isTopLevel)
{
// System.out.println("calling m_expr.execute(getXPathContext())");
VariableStack vars = xctxt.getVarStack();
// These three statements need to be combined into one operation.
int savedStart = vars.getStackFrame();
vars.setStackFrame(stackFrame);
result = (com.sun.org.apache.xpath.internal.objects.XNodeSet) expr.execute(xctxt);
result.setShouldCacheNodes(true);
// These two statements need to be combined into one operation.
vars.setStackFrame(savedStart);
}
else
result = (com.sun.org.apache.xpath.internal.objects.XNodeSet) expr.execute(xctxt);
}
catch (javax.xml.transform.TransformerException se)
{
// TODO: Fix...
throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(se);
}
finally
{
xctxt.popCurrentNode();
xctxt.setNamespaceContext(savedResolver);
}
return result;
}