Examples of javax.xml.xquery.XQException

javax.xml.xquery.XQException
An exception that provides information on XQJ, XQuery or other errors reported by an XQJ implementation.

Each XQException provides several kinds of information:
- a string describing the error. This is used as the Java Exception message, available via the method getMessage.
- the cause of the error. This is used as the Java Exception cause, available via the method getCause.
- the vendor code identifying the error. Available via the method getVendorCode. Refer to the vendor documentation which specific codes can be returned.
- a chain of XQException objects. If more than one error occurred the exceptions are referenced via this chain.
Note that XQException has a subclass {@link XQQueryException XQQueryException} providing more detailedinformation about errors that occurred during the processing of a query. An implementation throws a base XQException when an error occurs in the XQJ implementation. Further, implementations are encouraged to use the more detailed XQQueryException in case of an error reported by the XQuery engine.

It is possible that during the processing of a query that one or more errors could occur, each with their own potential causal relationship. This means that when an XQJ application catches an XQException, there is a possibility that there may be additional XQException objects chained to the original thrown XQException. To access the additional chained XQException objects, an application would recursively invoke getNextException until a null value is returned.

An XQException may have a causal relationship, which consists of one or more Throwable instances which caused the XQException to be thrown. The application may recursively call the method getCause, until a null value is returned, to navigate the chain of causes.

    public void setScrollability(int scrollability) throws XQException {
        readOnly();
    }


    private void readOnly() throws XQException {
        throw new XQException("This XQStaticContext object is read-only");
    }

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            if (it instanceof DocumentNodeTest) {
                it = ((DocumentNodeTest)it).getElementTest();
            }
            if ((it.getNodeKindMask() &
                    (1<<Type.DOCUMENT | 1<<Type.TEXT | 1<<Type.COMMENT | 1<<Type.PROCESSING_INSTRUCTION | 1<<Type.NAMESPACE)) != 0) {
                throw new XQException("Wrong node kind for getBaseType()");
            }
            SchemaType contentType = it.getContentType();
            if (contentType.isAtomicType()) {
                AtomicType at = (AtomicType)contentType;
                while (!at.isBuiltInType()) {
                    at = (AtomicType)at.getBaseType();
                }
                return SaxonXQDataFactory.mapSaxonTypeToXQJ(at.getFingerprint());
            } else if (contentType.isSimpleType()) {
                if (((SimpleType)contentType).isListType()) {
                    int fp = contentType.getFingerprint();
                    if (fp == StandardNames.XS_NMTOKENS) {
                        return XQBASETYPE_NMTOKENS;
                    } else if (fp == StandardNames.XS_ENTITIES) {
                        return XQBASETYPE_ENTITIES;
                    } else if (fp == StandardNames.XS_IDREFS) {
                        return XQBASETYPE_IDREFS;
                    }
                }
                return XQBASETYPE_ANYSIMPLETYPE;
            } else if (contentType == Untyped.getInstance()) {
                return XQBASETYPE_UNTYPED;
            } else {
                return XQBASETYPE_ANYTYPE;
            }


        } else {
            throw new XQException("Wrong item type for getBaseType()");
        }
    }

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            type = ((DocumentNodeTest)type).getElementTest();
        }
        if (type instanceof NodeTest) {
            if ((((NodeTest)type).getNodeKindMask() &
                    (1<<Type.DOCUMENT | 1<<Type.TEXT | 1<<Type.COMMENT | 1<<Type.PROCESSING_INSTRUCTION | 1<<Type.NAMESPACE)) != 0) {
                throw new XQException("Wrong node kind for getNodeName()");
            }
            IntHashSet set = ((NodeTest)type).getRequiredNodeNames();
            if (set != null && set.size() == 1) {
                int fp = set.getFirst(-1);
                NamePool pool = config.getNamePool();
                String uri = pool.getURI(fp);
                String local = pool.getLocalName(fp);
                return new QName(uri, local);
            } else {
                return null;
            }
        }
        throw new XQException("getNodeName() is not defined for this kind of item type");
    }

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            NamePool pool = config.getNamePool();
            return pool.getLocalName(((NameTest)itemType).getFingerprint());
        } else if (itemType instanceof NodeKindTest && itemType.getPrimitiveType() == Type.PROCESSING_INSTRUCTION) {
            return null;
        } else {
            throw new XQException("Item kind is not a processing instruction");
        }
    }

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            type = ((DocumentNodeTest)type).getElementTest();
        }
        if (type instanceof NodeTest) {
            if ((((NodeTest)type).getNodeKindMask() &
                    (1<<Type.DOCUMENT | 1<<Type.TEXT | 1<<Type.COMMENT | 1<<Type.PROCESSING_INSTRUCTION | 1<<Type.NAMESPACE)) != 0) {
                throw new XQException("getTypeName() failed: itemType is not a document, element, or attribute test");
            }
            SchemaType t = ((NodeTest)type).getContentType();
            if (t != null) {
                int fp = ((NodeTest)type).getContentType().getFingerprint();
                NamePool pool = config.getNamePool();
                String uri = pool.getURI(fp);
                String local = pool.getLocalName(fp);
                return new QName(uri, local);
            }
        }
        throw new XQException("getTypeName() failed: itemType is not a document, element, or attribute test");
    }

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    public String getAtomicValue() throws XQException {
        checkNotClosed();
        if (item instanceof AtomicValue) {
            return item.getStringValue();
        }
        throw new XQException("Failed to getAtomicValue: item is a node, or is closed");
    }

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    public boolean getBoolean() throws XQException {
        checkNotClosed();
        if (item instanceof BooleanValue) {
            return ((BooleanValue)item).getBooleanValue();
        }
        throw new XQException("Failed in getBoolean: item is not a boolean, or is closed");
    }

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        checkNotClosed();
        if (item instanceof AtomicValue) {
            AtomicValue prim = ((AtomicValue)item);
            return (byte)longValue(prim, -128, 127);
        }
        throw new XQException("Failed in getByte: item is not an atomic value, or is closed");
    }

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    }


    private static long longValue(AtomicValue value, long min, long max) throws XQException {
        if (value instanceof NumericValue) {
            if (value instanceof DoubleValue || value instanceof FloatValue) {
                throw new XQException("Value is a double or float");
            }
            if (!((NumericValue)value).isWholeNumber()) {
                throw new XQException("Value is not a whole number");
            }
            try {
                long val = ((NumericValue)value).longValue();
                if (val >= min && val <= max) {
                    return val;
                } else {
                    throw new XQException("Value is out of range for requested type");
                }
            } catch (XPathException err) {
                XQException xqe = new XQException(err.getMessage());
                xqe.initCause(err);
                throw xqe;
            }
        }
        throw new XQException("Value is not numeric");
    }

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    public double getDouble() throws XQException {
        checkNotClosed();
        if (item instanceof DoubleValue) {
            return ((DoubleValue)item).getDoubleValue();
        }
        throw new XQException("Failed in getDouble: item is not a double, or is closed");
    }

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Related Classes of javax.xml.xquery.XQException

net.sf.saxon.xqj.Closable

net.sf.saxon.xqj.SaxonXQDataSource

net.sf.saxon.xqj.SaxonXQExpression

net.sf.saxon.xqj.SaxonXQExpressionContext

net.sf.saxon.xqj.SaxonXQItem

net.sf.saxon.xqj.SaxonXQItemType

net.sf.saxon.xqj.SaxonXQStaticContext

net.sf.saxon.xqj.StandardObjectConverter

org.pdf4j.saxon.xqj.Closable

org.pdf4j.saxon.xqj.SaxonXQDataSource

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