程序包 cn.taketoday.util.xml

类 XmlValidationModeDetector

java.lang.Object

cn.taketoday.util.xml.XmlValidationModeDetector

public class XmlValidationModeDetector
extends Object

Detects whether an XML stream is using DTD- or XSD-based validation.

从以下版本开始:

4.0

作者:

Rob Harrop, Juergen Hoeller, Sam Brannen

字段概要

字段

修饰符和类型	字段	说明
private static final String	DOCTYPE	The token in an XML document that declares the DTD to use for validation and thus that DTD validation is being used.
private static final String	END_COMMENT	The token that indicates the end of an XML comment.
private boolean	inComment	Indicates whether or not the current parse position is inside an XML comment.
private static final String	START_COMMENT	The token that indicates the start of an XML comment.
static final int	VALIDATION_AUTO	Indicates that the validation mode should be auto-guessed, since we cannot find a clear indication (probably choked on some special characters, or the like).
static final int	VALIDATION_DTD	Indicates that DTD validation should be used (we found a "DOCTYPE" declaration).
static final int	VALIDATION_NONE	Indicates that the validation should be disabled.
static final int	VALIDATION_XSD	Indicates that XSD validation should be used (found no "DOCTYPE" declaration).

构造器概要

构造器

构造器	说明
XmlValidationModeDetector()

方法概要

修饰符和类型	方法	说明
private int	commentToken(String line, String token, boolean inCommentIfPresent)	Try to consume the supplied token against the supplied content and update the "in comment" parse state to the supplied value.
private String	consume(String line)	Consume the next comment token, update the "inComment" flag, and return the remaining content.
private String	consumeCommentTokens(String line)	Consume all comments in the given String and return the remaining content, which may be empty since the supplied content might be all comment data.
int	detectValidationMode(InputStream inputStream)	Detect the validation mode for the XML document in the supplied InputStream.
private int	endComment(String line)	Try to consume the END_COMMENT token.
private boolean	hasDoctype(String content)	Does the content contain the DTD DOCTYPE declaration?
private boolean	hasOpeningTag(String content)	Determine if the supplied content contains an XML opening tag.
private int	startComment(String line)	Try to consume the START_COMMENT token.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

VALIDATION_NONE

public static final int VALIDATION_NONE

Indicates that the validation should be disabled.

另请参阅:

• 常量字段值

VALIDATION_AUTO

public static final int VALIDATION_AUTO

Indicates that the validation mode should be auto-guessed, since we cannot find a clear indication (probably choked on some special characters, or the like).

另请参阅:

• 常量字段值

VALIDATION_DTD

public static final int VALIDATION_DTD

Indicates that DTD validation should be used (we found a "DOCTYPE" declaration).

另请参阅:

• 常量字段值

VALIDATION_XSD

public static final int VALIDATION_XSD

Indicates that XSD validation should be used (found no "DOCTYPE" declaration).

另请参阅:

• 常量字段值

DOCTYPE

private static final String DOCTYPE

The token in an XML document that declares the DTD to use for validation and thus that DTD validation is being used.

另请参阅:

• 常量字段值

START_COMMENT

private static final String START_COMMENT

The token that indicates the start of an XML comment.

另请参阅:

• 常量字段值

END_COMMENT

private static final String END_COMMENT

The token that indicates the end of an XML comment.

另请参阅:

• 常量字段值

inComment

private boolean inComment

Indicates whether or not the current parse position is inside an XML comment.

构造器详细资料

XmlValidationModeDetector

public XmlValidationModeDetector()

方法详细资料

detectValidationMode

public int detectValidationMode(InputStream inputStream)
                         throws IOException

Detect the validation mode for the XML document in the supplied InputStream.

Note that the supplied InputStream is closed by this method before returning.

参数:

inputStream - the InputStream to parse

抛出:

IOException - in case of I/O failure

另请参阅:

• VALIDATION_DTD
• VALIDATION_XSD

hasDoctype

private boolean hasDoctype(String content)

Does the content contain the DTD DOCTYPE declaration?

hasOpeningTag

private boolean hasOpeningTag(String content)

Determine if the supplied content contains an XML opening tag.

It is expected that all comment tokens will have been consumed for the supplied content before passing the remainder to this method. However, as a sanity check, if the parse state is currently in an XML comment this method always returns false.

consumeCommentTokens

private String consumeCommentTokens(String line)

Consume all comments in the given String and return the remaining content, which may be empty since the supplied content might be all comment data.

This method takes the current "in comment" parsing state into account.

consume

@Nullable
private String consume(String line)

Consume the next comment token, update the "inComment" flag, and return the remaining content.

startComment

private int startComment(String line)

Try to consume the START_COMMENT token.

另请参阅:

• commentToken(String, String, boolean)

endComment

private int endComment(String line)

Try to consume the END_COMMENT token.

另请参阅:

• commentToken(String, String, boolean)

commentToken

private int commentToken(String line,
 String token,
 boolean inCommentIfPresent)

Try to consume the supplied token against the supplied content and update the "in comment" parse state to the supplied value.

Returns the index into the content which is after the token or -1 if the token is not found.