本文整理汇总了Java中com.sun.org.apache.xpath.internal.compiler.OpCodes.OP_VARIABLE属性的典型用法代码示例。如果您正苦于以下问题:Java OpCodes.OP_VARIABLE属性的具体用法?Java OpCodes.OP_VARIABLE怎么用?Java OpCodes.OP_VARIABLE使用的例子?那么恭喜您, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类com.sun.org.apache.xpath.internal.compiler.OpCodes
的用法示例。
在下文中一共展示了OpCodes.OP_VARIABLE属性的5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: analyzePredicate
/**
* Analyze a step and give information about it's predicates. Right now this
* just returns true or false if the step has a predicate.
*
* @param compiler non-null reference to compiler object that has processed
* the XPath operations into an opcode map.
* @param opPos The opcode position for the step.
* @param stepType The type of step, one of OP_GROUP, etc.
*
* @return true if step has a predicate.
*
* @throws javax.xml.transform.TransformerException
*/
static boolean analyzePredicate(Compiler compiler, int opPos, int stepType)
throws javax.xml.transform.TransformerException
{
int argLen;
switch (stepType)
{
case OpCodes.OP_VARIABLE :
case OpCodes.OP_EXTFUNCTION :
case OpCodes.OP_FUNCTION :
case OpCodes.OP_GROUP :
argLen = compiler.getArgLength(opPos);
break;
default :
argLen = compiler.getArgLengthOfStep(opPos);
}
int pos = compiler.getFirstPredicateOpPos(opPos);
int nPredicates = compiler.countPredicates(pos);
return (nPredicates > 0) ? true : false;
}
示例2: isProximateInnerExpr
static boolean isProximateInnerExpr(Compiler compiler, int opPos)
{
int op = compiler.getOp(opPos);
int innerExprOpPos = opPos+2;
switch(op)
{
case OpCodes.OP_ARGUMENT:
if(isProximateInnerExpr(compiler, innerExprOpPos))
return true;
break;
case OpCodes.OP_VARIABLE:
case OpCodes.OP_NUMBERLIT:
case OpCodes.OP_LITERAL:
case OpCodes.OP_LOCATIONPATH:
break; // OK
case OpCodes.OP_FUNCTION:
boolean isProx = functionProximateOrContainsProximate(compiler, opPos);
if(isProx)
return true;
break;
case OpCodes.OP_GT:
case OpCodes.OP_GTE:
case OpCodes.OP_LT:
case OpCodes.OP_LTE:
case OpCodes.OP_EQUALS:
int leftPos = OpMap.getFirstChildPos(op);
int rightPos = compiler.getNextOpPos(leftPos);
isProx = isProximateInnerExpr(compiler, leftPos);
if(isProx)
return true;
isProx = isProximateInnerExpr(compiler, rightPos);
if(isProx)
return true;
break;
default:
return true; // be conservative...
}
return false;
}
示例3: init
/**
* Init a FilterExprWalker.
*
* @param compiler non-null reference to the Compiler that is constructing.
* @param opPos positive opcode position for this step.
* @param stepType The type of step.
*
* @throws javax.xml.transform.TransformerException
*/
public void init(Compiler compiler, int opPos, int stepType)
throws javax.xml.transform.TransformerException
{
super.init(compiler, opPos, stepType);
// Smooth over an anomily in the opcode map...
switch (stepType)
{
case OpCodes.OP_FUNCTION :
case OpCodes.OP_EXTFUNCTION :
m_mustHardReset = true;
case OpCodes.OP_GROUP :
case OpCodes.OP_VARIABLE :
m_expr = compiler.compile(opPos);
m_expr.exprSetParent(this);
//if((OpCodes.OP_FUNCTION == stepType) && (m_expr instanceof com.sun.org.apache.xalan.internal.templates.FuncKey))
if(m_expr instanceof com.sun.org.apache.xpath.internal.operations.Variable)
{
// hack/temp workaround
m_canDetachNodeset = false;
}
break;
default :
m_expr = compiler.compile(opPos + 2);
m_expr.exprSetParent(this);
}
// if(m_expr instanceof WalkingIterator)
// {
// WalkingIterator wi = (WalkingIterator)m_expr;
// if(wi.getFirstWalker() instanceof FilterExprWalker)
// {
// FilterExprWalker fw = (FilterExprWalker)wi.getFirstWalker();
// if(null == fw.getNextWalker())
// {
// m_expr = fw.m_expr;
// m_expr.exprSetParent(this);
// }
// }
//
// }
}
示例4: loadLocationPaths
/**
* Initialize the location path iterators. Recursive.
*
* @param compiler The Compiler which is creating
* this expression.
* @param opPos The position of this iterator in the
* opcode list from the compiler.
* @param count The insert position of the iterator.
*
* @throws javax.xml.transform.TransformerException
*/
protected void loadLocationPaths(Compiler compiler, int opPos, int count)
throws javax.xml.transform.TransformerException
{
// TODO: Handle unwrapped FilterExpr
int steptype = compiler.getOp(opPos);
if (steptype == OpCodes.OP_LOCATIONPATH)
{
loadLocationPaths(compiler, compiler.getNextOpPos(opPos), count + 1);
m_exprs[count] = createDTMIterator(compiler, opPos);
m_exprs[count].exprSetParent(this);
}
else
{
// Have to check for unwrapped functions, which the LocPathIterator
// doesn't handle.
switch (steptype)
{
case OpCodes.OP_VARIABLE :
case OpCodes.OP_EXTFUNCTION :
case OpCodes.OP_FUNCTION :
case OpCodes.OP_GROUP :
loadLocationPaths(compiler, compiler.getNextOpPos(opPos), count + 1);
WalkingIterator iter =
new WalkingIterator(compiler.getNamespaceContext());
iter.exprSetParent(this);
if(compiler.getLocationPathDepth() <= 0)
iter.setIsTopLevel(true);
iter.m_firstWalker = new com.sun.org.apache.xpath.internal.axes.FilterExprWalker(iter);
iter.m_firstWalker.init(compiler, opPos, steptype);
m_exprs[count] = iter;
break;
default :
m_exprs = new LocPathIterator[count];
}
}
}
示例5: getAxisFromStep
/**
* Special purpose function to see if we can optimize the pattern for
* a DescendantIterator.
*
* @param compiler non-null reference to compiler object that has processed
* the XPath operations into an opcode map.
* @param stepOpCodePos The opcode position for the step.
*
* @return 32 bits as an integer that give information about the location
* path as a whole.
*
* @throws javax.xml.transform.TransformerException
*/
public static int getAxisFromStep(
Compiler compiler, int stepOpCodePos)
throws javax.xml.transform.TransformerException
{
int stepType = compiler.getOp(stepOpCodePos);
switch (stepType)
{
case OpCodes.FROM_FOLLOWING :
return Axis.FOLLOWING;
case OpCodes.FROM_FOLLOWING_SIBLINGS :
return Axis.FOLLOWINGSIBLING;
case OpCodes.FROM_PRECEDING :
return Axis.PRECEDING;
case OpCodes.FROM_PRECEDING_SIBLINGS :
return Axis.PRECEDINGSIBLING;
case OpCodes.FROM_PARENT :
return Axis.PARENT;
case OpCodes.FROM_NAMESPACE :
return Axis.NAMESPACE;
case OpCodes.FROM_ANCESTORS :
return Axis.ANCESTOR;
case OpCodes.FROM_ANCESTORS_OR_SELF :
return Axis.ANCESTORORSELF;
case OpCodes.FROM_ATTRIBUTES :
return Axis.ATTRIBUTE;
case OpCodes.FROM_ROOT :
return Axis.ROOT;
case OpCodes.FROM_CHILDREN :
return Axis.CHILD;
case OpCodes.FROM_DESCENDANTS_OR_SELF :
return Axis.DESCENDANTORSELF;
case OpCodes.FROM_DESCENDANTS :
return Axis.DESCENDANT;
case OpCodes.FROM_SELF :
return Axis.SELF;
case OpCodes.OP_EXTFUNCTION :
case OpCodes.OP_FUNCTION :
case OpCodes.OP_GROUP :
case OpCodes.OP_VARIABLE :
return Axis.FILTEREDLIST;
}
throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_NULL_ERROR_HANDLER, new Object[]{Integer.toString(stepType)})); //"Programmer's assertion: unknown opcode: "
//+ stepType);
}