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An OSGi bundle for Saxon-HE
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2013 Saxonica Limited.
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
package net.sf.saxon.style;
import net.sf.saxon.expr.Expression;
import net.sf.saxon.expr.Literal;
import net.sf.saxon.expr.instruct.AttributeSet;
import net.sf.saxon.expr.instruct.Executable;
import net.sf.saxon.expr.instruct.SlotManager;
import net.sf.saxon.expr.parser.ExpressionVisitor;
import net.sf.saxon.lib.NamespaceConstant;
import net.sf.saxon.om.*;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.tree.iter.AxisIterator;
import net.sf.saxon.type.AnyItemType;
import net.sf.saxon.value.Whitespace;
import java.util.ArrayList;
import java.util.List;
/**
* An xsl:attribute-set element in the stylesheet.
*/
public class XSLAttributeSet extends StyleElement implements StylesheetProcedure {
private String nameAtt;
// the name of the attribute set as written
/*@Nullable*/ private String useAtt;
// the value of the use-attribute-sets attribute, as supplied
private SlotManager stackFrameMap;
// needed if variables are used
private List attributeSetElements = null;
// list of Declarations of XSLAttributeSet objects referenced by this one
private AttributeSet[] useAttributeSets = null;
// compiled instructions for the attribute sets used by this one
private AttributeSet procedure = new AttributeSet();
// the compiled form of this attribute set
private int referenceCount = 0;
// the number of references to this attribute set
private boolean validated = false;
/**
* Ask whether this node is a declaration, that is, a permitted child of xsl:stylesheet
* (including xsl:include and xsl:import).
* @return true for this element
*/
@Override
public boolean isDeclaration() {
return true;
}
/**
* Get the name of this attribute set
* @return the name of the attribute set, as a QName
*/
public StructuredQName getAttributeSetName() {
return getObjectName();
}
/**
* Get the compiled code produced for this XSLT element
* @return the compiled AttributeSet
*/
public AttributeSet getInstruction() {
return procedure;
}
/**
* Increment the number of references found to this attribute set
*/
public void incrementReferenceCount() {
referenceCount++;
}
public void prepareAttributes() throws XPathException {
useAtt = null;
AttributeCollection atts = getAttributeList();
for (int a=0; a(5);
useAttributeSets = getAttributeSets(useAtt, attributeSetElements);
// check for circularity
for (Declaration attributeSetElement : attributeSetElements) {
((XSLAttributeSet) attributeSetElement.getSourceElement()).checkCircularity(this);
}
}
validated = true;
}
/**
* Check for circularity: specifically, check that this attribute set does not contain
* a direct or indirect reference to the one supplied as a parameter
* @param origin the place from which the search started
* @throws net.sf.saxon.trans.XPathException if an error is found
*/
public void checkCircularity(XSLAttributeSet origin) throws XPathException {
if (this==origin) {
compileError("The definition of the attribute set is circular", "XTSE0720");
useAttributeSets = null;
} else {
if (!validated) {
// if this attribute set isn't validated yet, we don't check it.
// The circularity will be detected when the last attribute set in the cycle
// gets validated
return;
}
if (attributeSetElements != null) {
for (Declaration attributeSetElement : attributeSetElements) {
((XSLAttributeSet) attributeSetElement.getSourceElement()).checkCircularity(origin);
}
}
}
}
/**
* Get details of stack frame
*/
public SlotManager getSlotManager() {
return stackFrameMap;
}
/**
* Compile the attribute set
* @param exec the Executable
* @param decl this attribute set declaration
* @throws XPathException if a failure is detected
*/
public void compileDeclaration(Executable exec, Declaration decl) throws XPathException {
if (referenceCount > 0 ) {
Expression body = compileSequenceConstructor(exec, decl, iterateAxis(AxisInfo.CHILD), true);
if (body == null) {
body = Literal.makeEmptySequence();
}
try {
ExpressionVisitor visitor = makeExpressionVisitor();
body = visitor.simplify(body);
if (getConfiguration().isCompileWithTracing()) {
body = makeTraceInstruction(this, body);
// trace.setLocationId(allocateLocationId(getSystemId(), getLineNumber()));
// trace.setContainer(procedure);
// body = trace;
}
procedure.setUseAttributeSets(useAttributeSets);
procedure.setName(getObjectName());
procedure.setBody(body);
procedure.setSystemId(getSystemId());
procedure.setLineNumber(getLineNumber());
procedure.setExecutable(exec);
Expression exp2 = body.optimize(visitor, new ExpressionVisitor.ContextItemType(AnyItemType.getInstance(), true));
if (body != exp2) {
procedure.setBody(exp2);
body = exp2;
}
super.allocateSlots(body);
procedure.setStackFrameMap(stackFrameMap);
} catch (XPathException e) {
compileError(e);
}
}
}
/**
* Optimize the stylesheet construct
* @param declaration this attribute set declaration
*/
public void optimize(Declaration declaration) throws XPathException {
// Already done earlier
}
/**
* Get the type of construct. This will be a constant in
* class {@link net.sf.saxon.trace.Location}. This method is part of
* the {@link net.sf.saxon.trace.InstructionInfo} interface
*/
public int getConstructType() {
return StandardNames.XSL_ATTRIBUTE_SET;
}
}