Package org.apache.jasper.compiler
Class JspUtil
- java.lang.Object
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- org.apache.jasper.compiler.JspUtil
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public class JspUtil extends java.lang.Object
This class has all the utility method(s). Ideally should move all the bean containers here.- Author:
- Mandar Raje., Rajiv Mordani., Danno Ferrin, Pierre Delisle, Shawn Bayern, Mark Roth
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
JspUtil.ValidAttribute
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Field Summary
Fields Modifier and Type Field Description static int
CHUNKSIZE
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Constructor Summary
Constructors Constructor Description JspUtil()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static boolean
booleanValue(java.lang.String s)
Convert a String value to 'boolean'.static void
checkAttributes(java.lang.String typeOfTag, org.apache.jasper.compiler.Node n, JspUtil.ValidAttribute[] validAttributes, ErrorDispatcher err)
Checks if all mandatory attributes are present and if all attributes present have valid names.static void
checkScope(java.lang.String scope, org.apache.jasper.compiler.Node n, ErrorDispatcher err)
Checks to see if the given scope is valid.static java.lang.String
coerceToBoolean(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToByte(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToChar(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToCharacter(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToDouble(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToFloat(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToInt(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToInteger(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToLong(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToPrimitiveBoolean(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToPrimitiveByte(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToPrimitiveDouble(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToPrimitiveFloat(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToPrimitiveLong(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToPrimitiveShort(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
coerceToShort(java.lang.String s, boolean isNamedAttribute)
static java.lang.String
getExprInXml(java.lang.String expression)
Takes a potential expression and converts it into XML form.static org.xml.sax.InputSource
getInputSource(java.lang.String fname, Jar jar, JspCompilationContext ctxt)
static java.io.BufferedInputStream
getInputStream(java.lang.String fname, Jar jar, JspCompilationContext ctxt)
static java.lang.String
getTagHandlerClassName(java.lang.String path, java.lang.String packageName, java.lang.String urn, ErrorDispatcher err)
Gets the fully-qualified class name of the tag handler corresponding to the given tag file path.static java.lang.String
interpreterCall(boolean isTagFile, java.lang.String expression, java.lang.Class<?> expectedType, java.lang.String fnmapvar)
Produces a String representing a call to the EL interpreter.static boolean
isJavaKeyword(java.lang.String key)
Test whether the argument is a Java keyword.static java.lang.String
makeJavaIdentifier(java.lang.String identifier)
Converts the given identifier to a legal Java identifierstatic java.lang.String
makeJavaIdentifierForAttribute(java.lang.String identifier)
Converts the given identifier to a legal Java identifier to be used for JSP Tag file attribute names.static java.lang.String
makeJavaPackage(java.lang.String path)
Converts the given path to a Java package or fully-qualified class namestatic java.lang.String
mangleChar(char ch)
Mangle the specified character to create a legal Java class name.static java.lang.Class<?>
toClass(java.lang.String type, java.lang.ClassLoader loader)
Returns theClass
object associated with the class or interface with the given string name.static java.lang.String
toJavaSourceType(java.lang.String type)
Class.getName() return arrays in the form "[[[<et>", where et, the element type can be one of ZBCDFIJS or L<classname>;.static java.lang.String
toJavaSourceTypeFromTld(java.lang.String type)
Handles taking input from TLDs 'java.lang.Object' -> 'java.lang.Object.class' 'int' -> 'int.class' 'void' -> 'Void.TYPE' 'int[]' -> 'int[].class'
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Field Detail
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CHUNKSIZE
public static final int CHUNKSIZE
- See Also:
- Constant Field Values
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Method Detail
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getExprInXml
public static java.lang.String getExprInXml(java.lang.String expression)
Takes a potential expression and converts it into XML form.- Parameters:
expression
- The expression to convert- Returns:
- XML view
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checkScope
public static void checkScope(java.lang.String scope, org.apache.jasper.compiler.Node n, ErrorDispatcher err) throws JasperException
Checks to see if the given scope is valid.- Parameters:
scope
- The scope to be checkedn
- The Node containing the 'scope' attribute whose value is to be checkederr
- error dispatcher- Throws:
JasperException
- if scope is not null and different from "page", "request", "session", and "application"
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checkAttributes
public static void checkAttributes(java.lang.String typeOfTag, org.apache.jasper.compiler.Node n, JspUtil.ValidAttribute[] validAttributes, ErrorDispatcher err) throws JasperException
Checks if all mandatory attributes are present and if all attributes present have valid names. Checks attributes specified as XML-style attributes as well as attributes specified using the jsp:attribute standard action.- Parameters:
typeOfTag
- The tag typen
- The corresponding nodevalidAttributes
- The array with the valid attributeserr
- Dispatcher for errors- Throws:
JasperException
- An error occurred
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booleanValue
public static boolean booleanValue(java.lang.String s)
Convert a String value to 'boolean'. Besides the standard conversions done by Boolean.parseBoolean(s), the value "yes" (ignore case) is also converted to 'true'. If 's' is null, then 'false' is returned.- Parameters:
s
- the string to be converted- Returns:
- the boolean value associated with the string s
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toClass
public static java.lang.Class<?> toClass(java.lang.String type, java.lang.ClassLoader loader) throws java.lang.ClassNotFoundException
Returns theClass
object associated with the class or interface with the given string name.The
Class
object is determined by passing the given string name to theClass.forName()
method, unless the given string name represents a primitive type, in which case it is converted to aClass
object by appending ".class" to it (e.g., "int.class").- Parameters:
type
- The class name, array or primitive typeloader
- The class loader- Returns:
- the loaded class
- Throws:
java.lang.ClassNotFoundException
- Loading class failed
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interpreterCall
public static java.lang.String interpreterCall(boolean isTagFile, java.lang.String expression, java.lang.Class<?> expectedType, java.lang.String fnmapvar)
Produces a String representing a call to the EL interpreter.- Parameters:
isTagFile
-true
if the file is a tag file rather than a JSPexpression
- a String containing zero or more "${}" expressionsexpectedType
- the expected type of the interpreted resultfnmapvar
- Variable pointing to a function map.- Returns:
- a String representing a call to the EL interpreter.
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coerceToPrimitiveBoolean
public static java.lang.String coerceToPrimitiveBoolean(java.lang.String s, boolean isNamedAttribute)
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coerceToBoolean
public static java.lang.String coerceToBoolean(java.lang.String s, boolean isNamedAttribute)
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coerceToPrimitiveByte
public static java.lang.String coerceToPrimitiveByte(java.lang.String s, boolean isNamedAttribute)
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coerceToByte
public static java.lang.String coerceToByte(java.lang.String s, boolean isNamedAttribute)
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coerceToChar
public static java.lang.String coerceToChar(java.lang.String s, boolean isNamedAttribute)
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coerceToCharacter
public static java.lang.String coerceToCharacter(java.lang.String s, boolean isNamedAttribute)
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coerceToPrimitiveDouble
public static java.lang.String coerceToPrimitiveDouble(java.lang.String s, boolean isNamedAttribute)
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coerceToDouble
public static java.lang.String coerceToDouble(java.lang.String s, boolean isNamedAttribute)
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coerceToPrimitiveFloat
public static java.lang.String coerceToPrimitiveFloat(java.lang.String s, boolean isNamedAttribute)
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coerceToFloat
public static java.lang.String coerceToFloat(java.lang.String s, boolean isNamedAttribute)
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coerceToInt
public static java.lang.String coerceToInt(java.lang.String s, boolean isNamedAttribute)
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coerceToInteger
public static java.lang.String coerceToInteger(java.lang.String s, boolean isNamedAttribute)
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coerceToPrimitiveShort
public static java.lang.String coerceToPrimitiveShort(java.lang.String s, boolean isNamedAttribute)
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coerceToShort
public static java.lang.String coerceToShort(java.lang.String s, boolean isNamedAttribute)
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coerceToPrimitiveLong
public static java.lang.String coerceToPrimitiveLong(java.lang.String s, boolean isNamedAttribute)
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coerceToLong
public static java.lang.String coerceToLong(java.lang.String s, boolean isNamedAttribute)
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getInputStream
public static java.io.BufferedInputStream getInputStream(java.lang.String fname, Jar jar, JspCompilationContext ctxt) throws java.io.IOException
- Throws:
java.io.IOException
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getInputSource
public static org.xml.sax.InputSource getInputSource(java.lang.String fname, Jar jar, JspCompilationContext ctxt) throws java.io.IOException
- Throws:
java.io.IOException
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getTagHandlerClassName
public static java.lang.String getTagHandlerClassName(java.lang.String path, java.lang.String packageName, java.lang.String urn, ErrorDispatcher err) throws JasperException
Gets the fully-qualified class name of the tag handler corresponding to the given tag file path.- Parameters:
path
- Tag file pathpackageName
- The package nameurn
- The tag identifiererr
- Error dispatcher- Returns:
- Fully-qualified class name of the tag handler corresponding to the given tag file path
- Throws:
JasperException
- Failed to generate a class name for the tag
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makeJavaPackage
public static final java.lang.String makeJavaPackage(java.lang.String path)
Converts the given path to a Java package or fully-qualified class name- Parameters:
path
- Path to convert- Returns:
- Java package corresponding to the given path
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makeJavaIdentifier
public static final java.lang.String makeJavaIdentifier(java.lang.String identifier)
Converts the given identifier to a legal Java identifier- Parameters:
identifier
- Identifier to convert- Returns:
- Legal Java identifier corresponding to the given identifier
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makeJavaIdentifierForAttribute
public static final java.lang.String makeJavaIdentifierForAttribute(java.lang.String identifier)
Converts the given identifier to a legal Java identifier to be used for JSP Tag file attribute names.- Parameters:
identifier
- Identifier to convert- Returns:
- Legal Java identifier corresponding to the given identifier
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mangleChar
public static final java.lang.String mangleChar(char ch)
Mangle the specified character to create a legal Java class name.- Parameters:
ch
- The character- Returns:
- the replacement character as a string
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isJavaKeyword
public static boolean isJavaKeyword(java.lang.String key)
Test whether the argument is a Java keyword.- Parameters:
key
- The name- Returns:
true
if the name is a java identifier
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toJavaSourceTypeFromTld
public static java.lang.String toJavaSourceTypeFromTld(java.lang.String type)
Handles taking input from TLDs 'java.lang.Object' -> 'java.lang.Object.class' 'int' -> 'int.class' 'void' -> 'Void.TYPE' 'int[]' -> 'int[].class'- Parameters:
type
- The type from the TLD- Returns:
- the Java type
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toJavaSourceType
public static java.lang.String toJavaSourceType(java.lang.String type)
Class.getName() return arrays in the form "[[[<et>", where et, the element type can be one of ZBCDFIJS or L<classname>;. It is converted into forms that can be understood by javac.- Parameters:
type
- the type to convert- Returns:
- the equivalent type in Java sources
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