Package org.pdf4j.saxon.expr

Examples of org.pdf4j.saxon.expr.Expression

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            } catch (XPathException err) {
                // fall through to non-optimizing case
            }
        }

        Expression action = compileSequenceConstructor(exec, iterateAxis(Axis.CHILD), true);
        if (action == null) {
            return null;
        }
        Expression[] conditions = {test};
        Expression[] actions = {action};
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    * This is a pure function so it can be simplified in advance if the arguments are known
     * @param visitor an expression visitor
     */

     public Expression simplify(ExpressionVisitor visitor) throws XPathException {
        Expression e = simplifyArguments(visitor);
        if (e == this) {
            maybePrecompile(visitor);
        }
        return e;
    }
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     *          if an error is discovered during this phase
     *          (typically a type error)
     */

    public Expression optimize(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException {
        Expression e = super.optimize(visitor, contextItemType);
        // try once again to compile the regular expression once if possible
        // (used when the regex has been identified as a constant as a result of earlier rewrites)
        if (e == this) {
            maybePrecompile(visitor);
        }
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    public void validate() throws XPathException {
        //checkWithinTemplate();
    }

    public Expression compile(Executable exec) throws XPathException {
        Expression content = compileSequenceConstructor(exec, iterateAxis(Axis.CHILD), true);
        if (content == null) {
            content = Literal.makeEmptySequence();
        }
        Doctype inst = new Doctype(content);
        return inst;
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            if (curr == null) {
                break;
            }
            if (curr instanceof XSLWhen) {
                conditions[w] = ((XSLWhen)curr).getCondition();
                Expression b = ((XSLWhen)curr).compileSequenceConstructor(
                        exec, curr.iterateAxis(Axis.CHILD), true);
                if (b == null) {
                    b = Literal.makeEmptySequence();
                }
                try {
                    b = makeExpressionVisitor().simplify(b);
                    actions[w] = b;
                } catch (XPathException e) {
                    compileError(e);
                }

                if (getPreparedStylesheet().isCompileWithTracing()) {
                    TraceWrapper trace = makeTraceInstruction((XSLWhen)curr, actions[w]);
                    actions[w] = trace;
                }

                // Optimize for constant conditions (true or false)
                if (conditions[w] instanceof Literal && ((Literal)conditions[w]).getValue() instanceof BooleanValue) {
                    if (((BooleanValue)((Literal)conditions[w]).getValue()).getBooleanValue()) {
                        // constant true: truncate the tests here
                        entries = w+1;
                        break;
                    } else {
                        // constant false: omit this test
                        w--;
                        entries--;
                    }
                }
                w++;
            } else if (curr instanceof XSLOtherwise) {
                conditions[w] = Literal.makeLiteral(BooleanValue.TRUE);
                Expression b = ((XSLOtherwise)curr).compileSequenceConstructor(
                        exec, curr.iterateAxis(Axis.CHILD), true);
                if (b == null) {
                    b = Literal.makeEmptySequence();
                }
                try {
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    public XPathExpressionImpl createExpression(String expression) throws org.pdf4j.saxon.trans.XPathException {
        return createExpressionInternal(expression);
    }

    private XPathExpressionImpl createExpressionInternal(String expression) throws org.pdf4j.saxon.trans.XPathException {
        Expression exp = ExpressionTool.make(expression, staticContext, 0, -1, 1, false);
        ExpressionVisitor visitor = ExpressionVisitor.make(staticContext);
        visitor.setExecutable(getExecutable());
        exp = visitor.typeCheck(exp, Type.ITEM_TYPE);
        SlotManager map = staticContext.getConfiguration().makeSlotManager();
        ExpressionTool.allocateSlots(exp, 0, map);
        exp.setContainer(staticContext);
        XPathExpressionImpl xpe = new XPathExpressionImpl(exp, getExecutable());
        xpe.setStackFrameMap(map);
        if (contextNode != null) {
            xpe.privatelySetContextNode(contextNode);
        }
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     * </ul>
     * @deprecated since Saxon 8.9 - use the various method defined in the JAXP interface definition
    */

    public List evaluate(String expression) throws org.pdf4j.saxon.trans.XPathException {
        Expression exp = ExpressionTool.make(expression, staticContext,0,-1,1, false);
        ExpressionVisitor visitor = ExpressionVisitor.make(staticContext);
        visitor.setExecutable(getExecutable());
        exp = visitor.typeCheck(exp, Type.ITEM_TYPE);
        SlotManager map = staticContext.getConfiguration().makeSlotManager();
        ExpressionTool.allocateSlots(exp, 0, map);
        XPathContextMajor context = new XPathContextMajor(contextNode, staticContext.getExecutable());
        context.openStackFrame(map);
        SequenceIterator iterator = exp.iterate(context);
        ArrayList list = new ArrayList(20);
        while (true) {
            Item item = iterator.next();
            if (item == null) {
                return list;
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    * the evaluate() method
     * @deprecated since Saxon 8.9 - use the methods defined in the JAXP interface
    */

    public Object evaluateSingle(String expression) throws org.pdf4j.saxon.trans.XPathException {
        Expression exp = ExpressionTool.make(expression, staticContext,0,-1,1, false);
        ExpressionVisitor visitor = ExpressionVisitor.make(staticContext);
        visitor.setExecutable(getExecutable());
        exp = visitor.typeCheck(exp, Type.ITEM_TYPE);
        SlotManager map = staticContext.getConfiguration().makeSlotManager();
        ExpressionTool.allocateSlots(exp, 0, map);
        XPathContextMajor context = new XPathContextMajor(contextNode, staticContext.getExecutable());
        context.openStackFrame(map);
        SequenceIterator iterator = exp.iterate(context);
        Item item = iterator.next();
        if (item == null) {
            return null;
        } else {
            return Value.convertToJava(item);
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            } else if (f.equals(StandardNames.USE_CHARACTER_MAPS)) {
                useCharacterMapsAtt = Whitespace.trim(atts.getValue(a));
            } else if (fans.contains(f) || f.startsWith("{")) {
                // this is a serialization attribute
                String val = Whitespace.trim(atts.getValue(a));
                Expression exp = makeAttributeValueTemplate(val);
                serializationAttributes.put(nc&0xfffff, exp);
          } else {
            checkUnknownAttribute(nc);
          }
        }
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        IntIterator it = serializationAttributes.keyIterator();
        while (it.hasNext()) {
            int fp = it.next();
            String displayName = getNamePool().getDisplayName(fp);
            final Expression exp1 = (Expression)serializationAttributes.get(fp);
            final Expression exp2 = typeCheck(displayName, exp1);
            if (exp1 != exp2) {
                serializationAttributes.put(fp, exp2);
            }
        }
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Related Classes of org.pdf4j.saxon.expr.Expression

  • org.pdf4j.saxon.dotnet.DotNetExtensionLibrary$UnresolvedExtensionFunction
  • org.pdf4j.saxon.event.SequenceReceiver
  • org.pdf4j.saxon.evpull.EventIteratorOverSequence
  • org.pdf4j.saxon.evpull.SingletonEventIterator
  • org.pdf4j.saxon.functions.FunctionLibraryList
  • org.pdf4j.saxon.functions.Replace
  • org.pdf4j.saxon.functions.Tokenize
  • org.pdf4j.saxon.instruct.Copy
  • org.pdf4j.saxon.instruct.Executable
  • org.pdf4j.saxon.instruct.LocationMap
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