Interface TypedXMLStreamReader
- All Superinterfaces:
XMLStreamConstants
,XMLStreamReader
- All Known Subinterfaces:
XMLStreamReader2
- All Known Implementing Classes:
DOMWrappingReader
,Stax2FilteredStreamReader
,Stax2ReaderAdapter
,Stax2ReaderImpl
,StreamReader2Delegate
XMLStreamReader
. It defines methods for
reading XML data and converting it into Java types.- Since:
- 3.0
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Field Summary
Fields inherited from interface javax.xml.stream.XMLStreamConstants
ATTRIBUTE, CDATA, CHARACTERS, COMMENT, DTD, END_DOCUMENT, END_ELEMENT, ENTITY_DECLARATION, ENTITY_REFERENCE, NAMESPACE, NOTATION_DECLARATION, PROCESSING_INSTRUCTION, SPACE, START_DOCUMENT, START_ELEMENT
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Method Summary
Modifier and TypeMethodDescriptionvoid
getAttributeAs
(int index, TypedValueDecoder tvd) Generic access method that can be used for efficient decoding of additional types not support natively by the typed stream reader.int
getAttributeAsArray
(int index, TypedArrayDecoder tad) Method that allows reading contents of an attribute as an array of whitespace-separate tokens, decoded using specified decoder.byte[]
getAttributeAsBinary
(int index) Read an attribute value as a byte array.byte[]
getAttributeAsBinary
(int index, Base64Variant v) boolean
getAttributeAsBoolean
(int index) Read an attribute value as a boolean.getAttributeAsDecimal
(int index) double
getAttributeAsDouble
(int index) double[]
getAttributeAsDoubleArray
(int index) float
getAttributeAsFloat
(int index) float[]
getAttributeAsFloatArray
(int index) int
getAttributeAsInt
(int index) Read an attribute value as a boolean.int[]
getAttributeAsIntArray
(int index) Read an attribute content as an int array.getAttributeAsInteger
(int index) long
getAttributeAsLong
(int index) Read an attribute value as a boolean.long[]
getAttributeAsLongArray
(int index) getAttributeAsQName
(int index) int
getAttributeIndex
(String namespaceURI, String localName) Returns the index of the attribute whose local name islocalName
and URI isnamespaceURI
or-1
if no such attribute exists.void
Generic decoding method that can be used for efficient decoding of additional types not support natively by the typed stream reader.byte[]
Convenience method that can be used similar to read binary content instead ofreadElementAsBinary(byte[], int, int, org.codehaus.stax2.typed.Base64Variant)
, in cases where neither performance nor memory usage is a big concern.byte[]
getElementAsBinary
(Base64Variant variant) Convenience method that can be used similar to read binary content instead ofreadElementAsBinary(byte[], int, int, org.codehaus.stax2.typed.Base64Variant)
, in cases where neither performance nor memory usage is a big concern.boolean
Read an element content as a boolean.double
Read an element content as a 64-bit floating point value.float
Read an element content as a 32-bit floating point value.int
Read an element content as a 32-bit integer.long
Read an element content as a 64-bit integer.int
Read an element content as an array of tokens.int
readElementAsBinary
(byte[] resultBuffer, int offset, int maxLength) int
readElementAsBinary
(byte[] resultBuffer, int offset, int maxLength, Base64Variant variant) Read element content as decoded byte sequence; possibly only reading a fragment of all element content.int
readElementAsDoubleArray
(double[] resultBuffer, int offset, int length) int
readElementAsFloatArray
(float[] resultBuffer, int offset, int length) int
readElementAsIntArray
(int[] resultBuffer, int offset, int length) Read an element content as an int array.int
readElementAsLongArray
(long[] resultBuffer, int offset, int length) Methods inherited from interface javax.xml.stream.XMLStreamReader
close, getAttributeCount, getAttributeLocalName, getAttributeName, getAttributeNamespace, getAttributePrefix, getAttributeType, getAttributeValue, getAttributeValue, getCharacterEncodingScheme, getElementText, getEncoding, getEventType, getLocalName, getLocation, getName, getNamespaceContext, getNamespaceCount, getNamespacePrefix, getNamespaceURI, getNamespaceURI, getNamespaceURI, getPIData, getPITarget, getPrefix, getProperty, getText, getTextCharacters, getTextCharacters, getTextLength, getTextStart, getVersion, hasName, hasNext, hasText, isAttributeSpecified, isCharacters, isEndElement, isStandalone, isStartElement, isWhiteSpace, next, nextTag, require, standaloneSet
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Method Details
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getElementAsBoolean
Read an element content as a boolean. The lexical representation of a boolean is defined by the XML Schema boolean data type. Whitespace MUST be collapsed according to the whiteSpace facet for the XML Schema boolean data type. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by the XML Schema boolean data type. (note: allowed lexical values are canonicals "true" and "false", as well as non-canonical "0" and "1")
These are the pre- and post-conditions of calling this method:
- Precondition: the current event is START_ELEMENT.
- Postcondition: the current event is the corresponding END_ELEMENT.
- Throws:
XMLStreamException
- If unable to access contentTypedXMLStreamException
- If unable to convert the resulting character sequence into an XML Schema boolean value.
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getElementAsInt
Read an element content as a 32-bit integer. The lexical representation of a integer is defined by the XML Schema integer data type. Whitespace MUST be collapsed according to the whiteSpace facet for the XML Schema integer data type. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by the XML Schema integer data type.
These are the pre and post conditions of calling this method:
- Precondition: the current event is START_ELEMENT.
- Postcondition: the current event is the corresponding END_ELEMENT.
- Throws:
XMLStreamException
- If unable to access contentTypedXMLStreamException
- If unable to convert the resulting character sequence into a Java (32-bit) integer.
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getElementAsLong
Read an element content as a 64-bit integer. The lexical representation of a integer is defined by the XML Schema integer data type. Whitespace MUST be collapsed according to the whiteSpace facet for the XML Schema integer data type. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by the XML Schema integer data type.
These are the pre and post conditions of calling this method:
- Precondition: the current event is START_ELEMENT.
- Postcondition: the current event is the corresponding END_ELEMENT.
- Throws:
XMLStreamException
- If unable to access contentTypedXMLStreamException
- If unable to convert the resulting character sequence into a Java (64-bit) integer.
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getElementAsFloat
Read an element content as a 32-bit floating point value. The lexical representation is defined by the XML Schema float data type. Whitespace MUST be collapsed according to the whiteSpace facet for the XML Schema float data type. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by the XML Schema integer data type.
Note that valid representations include basic Java textual representations, as well as 3 special tokens: "INF", "-INF" and "NaN"These are the pre and post conditions of calling this method:
- Precondition: the current event is START_ELEMENT.
- Postcondition: the current event is the corresponding END_ELEMENT.
- Throws:
XMLStreamException
- If unable to access contentTypedXMLStreamException
- If unable to convert the resulting character sequence into a Java float
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getElementAsDouble
Read an element content as a 64-bit floating point value. The lexical representation is defined by the XML Schema double data type. Whitespace MUST be collapsed according to the whiteSpace facet for the XML Schema double data type. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by the XML Schema integer data type.
Note that valid representations include basic Java textual representations, as well as 3 special tokens: "INF", "-INF" and "NaN"These are the pre and post conditions of calling this method:
- Precondition: the current event is START_ELEMENT.
- Postcondition: the current event is the corresponding END_ELEMENT.
- Throws:
XMLStreamException
- If unable to access contentTypedXMLStreamException
- If unable to convert the resulting character sequence into a Java double
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getElementAsInteger
- Throws:
XMLStreamException
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getElementAsDecimal
- Throws:
XMLStreamException
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getElementAsQName
- Throws:
XMLStreamException
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getElementAsBinary
Convenience method that can be used similar to read binary content instead ofreadElementAsBinary(byte[], int, int, org.codehaus.stax2.typed.Base64Variant)
, in cases where neither performance nor memory usage is a big concern.Note: base64 variant defaults to
Base64Variants.MIME
.- Throws:
XMLStreamException
- See Also:
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getElementAsBinary
Convenience method that can be used similar to read binary content instead ofreadElementAsBinary(byte[], int, int, org.codehaus.stax2.typed.Base64Variant)
, in cases where neither performance nor memory usage is a big concern.- Parameters:
variant
- Base64 variant content is in; needed to decode alternative variants ("modified base64")- Throws:
XMLStreamException
- See Also:
-
getElementAs
Generic decoding method that can be used for efficient decoding of additional types not support natively by the typed stream reader. When method is called, stream reader will collect all textual content of the current element (effectively doing something similar to a call toXMLStreamReader.getElementText()
, and then call one of decode methods defined inTypedValueDecoder
. The only difference is that passed value will be trimmed: that is, any leading or trailing white space will be removed prior to calling decode method. After the call, passed decoder object will have decoded and stored value (if succesful) or thrown an exception (if not).The main benefit of using this method (over just getting all content by calling
XMLStreamReader.getElementText()
is efficiency: the stream reader can efficiently gather all textual content necessary and pass it to the decoder, often avoiding construction of intemediate Strings.These are the pre- and post-conditions of calling this method:
- Precondition: the current event is START_ELEMENT.
- Postcondition: the current event is the corresponding END_ELEMENT.
Note that caller has to know more specific type of decoder, since the base interface does not specify methods for accessing actual decoded value.
- Throws:
XMLStreamException
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readElementAsBinary
int readElementAsBinary(byte[] resultBuffer, int offset, int maxLength, Base64Variant variant) throws XMLStreamException Read element content as decoded byte sequence; possibly only reading a fragment of all element content. The lexical representation of a byte array is defined by the XML Schema base64Binary data type. Whitespace MUST be collapsed according to the whiteSpace facet for the XML Schema base64Binary data type. An exception is thrown if content is not in the lexical space defined by the XML Schema base64Binary data type.Each call will read at least one decoded byte (and no more than the specified maximum length), if there is any content remaining. If none is available and END_ELEMENT is encountered, -1 is returned.
These are the pre and post conditions of calling this method:
- Precondition: the current event is either START_ELEMENT, or a textual event (CHARACTERS, CDATA), or END_ELEMENT (END_ELEMENT is allowed for convenience; if so, no read operation is tried, and -1 is returned immediately
- Postcondition: the current event is the corresponding END_ELEMENT, if all remaining binary content was read, or CHARACTERS if only a portion of the array was read
Additionally, caller MUST start decoding at START_ELEMENT; if the first decode calls is at CHARACTERS or CDATA event, results are not defined: result may be an exception, or invalid data being returned. Implementations are encouraged to throw an exception if possible, to make it easier to figure out the problem.
This method can be called multiple times until the cursor is positioned at the corresponding END_ELEMENT event. Stated differently, after the method is called for the first time, the cursor will move and remain in the CHARACTERS position while there are potentially more bytes available for reading.
- Parameters:
resultBuffer
- Array in which to copy decoded bytes.offset
- Starting offset of the first decoded byte within result buffermaxLength
- Maximum number of bytes to decode with this call- Returns:
- The number of bytes actually decoded and returned,
if any were available; -1 if there is no more content.
If any content was copied, value must be less or equal than
maxLength
Note that this value is not guaranteed to equalmaxLength
even if enough content was available; that is, implementations can return shorter sections if they choose to, down to and including returning zero (0) if it was not possible to decode a full base64 triplet (3 output bytes from 4 input characters). - Throws:
IllegalArgumentException
- IfresultBuffer
is null or offset is less than 0.XMLStreamException
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readElementAsBinary
- Throws:
XMLStreamException
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readElementAsIntArray
Read an element content as an int array. The lexical representation of a int array is defined by the following XML schema type:<xs:simpleType name="intArray"> <xs:list itemType="xs:int"/> </xs:simpleType>
whose lexical space is a list of space-separated ints. Whitespace MUST be collapsed according to the whiteSpace facet for theintArray
type shown above. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by theintArray
data type.These are the pre and post conditions of calling this method:
- Precondition: the current event is either START_ELEMENT, or a textual event (CHARACTERS, CDATA), or END_ELEMENT (END_ELEMENT is allowed for convenience; if so, no read operation is tried, and -1 is returned immediately
- Postcondition: the current event is the corresponding END_ELEMENT or CHARACTERS if only a portion of the array has been copied thus far.
- Parameters:
resultBuffer
- The array in which to copy the ints.offset
- The index in the array from which copying starts.length
- The maximun number of ints to copy. Minimum value is 1; others anIllegalArgumentException
is thrown- Returns:
- The number of ints actually copied which must
be less or equal than
length
, but at least one if any ints found. If not, -1 is returned to signal end of ints to parse. - Throws:
IllegalStateException
- If called on event other than START_ELEMENT, END_ELEMENT, or CHARACTERS (which resulted from an earlier call)XMLStreamException
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readElementAsLongArray
- Throws:
XMLStreamException
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readElementAsFloatArray
- Throws:
XMLStreamException
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readElementAsDoubleArray
int readElementAsDoubleArray(double[] resultBuffer, int offset, int length) throws XMLStreamException - Throws:
XMLStreamException
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readElementAsArray
Read an element content as an array of tokens. This is done by reader tokenizing textual content by white space, and sending each token to specified decoder for decoding. This is repeated as long as element content has more tokens and decoder can accept more values.These are the pre- and post-conditions of calling this method:
- Precondition: the current event is either START_ELEMENT, or a textual event (CHARACTERS, CDATA), or END_ELEMENT (END_ELEMENT is allowed for convenience; if so, no read operation is tried, and -1 is returned immediately
- Postcondition: the current event is the corresponding END_ELEMENT or CHARACTERS if only a portion of the array has been copied thus far.
Note: passed decoder must accept at least one value, reader will not verify capacity before calling it with the first token.
- Returns:
- Number of elements decoded, or -1 to indicate that there was no more element content tokens to decode.
- Throws:
IllegalStateException
- If called on event other than START_ELEMENT, END_ELEMENT, or CHARACTERS (which resulted from an earlier call)XMLStreamException
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getAttributeIndex
Returns the index of the attribute whose local name islocalName
and URI isnamespaceURI
or-1
if no such attribute exists.- Parameters:
namespaceURI
- The attribute's namespace URI. Values of null and "" are considered the same, i.e. "no namespace" (or "empty" namespace)localName
- The attribute's local name.- Returns:
- The attribute's index or
-1
if no such attribute exists. - Throws:
IllegalStateException
- If this is not a START_ELEMENT event
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getAttributeAsBoolean
Read an attribute value as a boolean. The lexical representation of a boolean is defined by the XML Schema boolean data type. Whitespace MUST be collapsed according to the whiteSpace facet for the XML Schema boolean data type. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by the XML Schema boolean data type.
- Parameters:
index
- The attribute's index as returned bygetAttributeIndex(String, String)
- Throws:
IllegalStateException
- If this is not a START_ELEMENT event.XMLStreamException
- If unable to convert the resulting character sequence into an XML Schema boolean value.
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getAttributeAsInt
Read an attribute value as a boolean. The lexical representation of a boolean is defined by the XML Schema integer data type. Whitespace MUST be collapsed according to the whiteSpace facet for the type. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by the XML Schema integer data type.
- Parameters:
index
- The attribute's index as returned bygetAttributeIndex(String, String)
- Throws:
IllegalStateException
- If this is not a START_ELEMENT event.XMLStreamException
- If unable to convert the resulting character sequence into an XML Schema boolean value.
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getAttributeAsLong
Read an attribute value as a boolean. The lexical representation of a boolean is defined by the XML Schema long data type. Whitespace MUST be collapsed according to the whiteSpace facet for the type. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by the XML Schema long data type.
- Parameters:
index
- The attribute's index as returned bygetAttributeIndex(String, String)
- Throws:
IllegalStateException
- If this is not a START_ELEMENT event.XMLStreamException
- If unable to convert the resulting character sequence into an XML Schema boolean value.
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getAttributeAsFloat
- Throws:
XMLStreamException
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getAttributeAsDouble
- Throws:
XMLStreamException
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getAttributeAsInteger
- Throws:
XMLStreamException
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getAttributeAsDecimal
- Throws:
XMLStreamException
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getAttributeAsQName
- Throws:
XMLStreamException
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getAttributeAs
Generic access method that can be used for efficient decoding of additional types not support natively by the typed stream reader. The main benefit of using this method is that the stream reader can efficient gather all textual content necessary and pass it to the decoder, often avoiding construction of intemediate Strings.As with
getElementAs(org.codehaus.stax2.typed.TypedValueDecoder)
, value passed to a decode method will be trimmed of any leading or trailing white space.- Throws:
XMLStreamException
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getAttributeAsBinary
Read an attribute value as a byte array. The lexical representation of a byte array is defined by the XML Schema base64Binary data type. Whitespace MUST be collapsed according to the whiteSpace facet for the XML Schema base64Binary data type. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by the XML Schema base64Binary data type.- Parameters:
index
- The attribute's index as returned bygetAttributeIndex(String, String)
.- Returns:
- An array of bytes with the content.
- Throws:
IllegalStateException
- If this is not a START_ELEMENT or ATTRIBUTE event.XMLStreamException
- If unable to convert the resulting character sequence into an XML Schema boolean value.
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getAttributeAsBinary
- Throws:
XMLStreamException
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getAttributeAsIntArray
Read an attribute content as an int array. The lexical representation of a int array is defined by the following XML schema type:
<xs:simpleType name="intArray"> <xs:list itemType="xs:int"/> </xs:simpleType>
whose lexical space is a list of space-separated ints. Whitespace MUST be collapsed according to the whiteSpace facet for theintArray
type shown above. An exception is thrown if, after whitespace is collapsed, the resulting sequence of characters is not in the lexical space defined by theintArray
data type.- Parameters:
index
- The attribute's index as returned bygetAttributeIndex(String, String)
.- Returns:
- An array of ints with the content.
- Throws:
IllegalStateException
- If this is not a START_ELEMENT or ATTRIBUTE event.XMLStreamException
- If unable to convert the resulting character sequence into an XML Schema boolean value.
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getAttributeAsLongArray
- Throws:
XMLStreamException
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getAttributeAsFloatArray
- Throws:
XMLStreamException
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getAttributeAsDoubleArray
- Throws:
XMLStreamException
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getAttributeAsArray
Method that allows reading contents of an attribute as an array of whitespace-separate tokens, decoded using specified decoder.- Returns:
- Number of tokens decoded, 0 if none found
- Throws:
XMLStreamException
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