com.taggercat.el
Class ELUtils

java.lang.Object
  com.taggercat.el.ELUtils

public class ELUtils
extends java.lang.Object

A collection of utility functions used by the EL Parser.

Field Summary

static int	CAST_BIGDECIMAL
static int	CAST_BIGINTEGER
static int	CAST_BYTE
static int	CAST_DOUBLE
static int	CAST_FLOAT
static int	CAST_INTEGER
static int	CAST_LONG
static int	CAST_SHORT

Method Summary

static void	addStaticMethods(java.lang.Class staticClasss, java.util.Map<java.lang.String,java.lang.String> functionMap, java.util.List<java.lang.String> functionNames) Adds all public static methods declared in the specified class to the EL's function map.
static java.lang.Object	getBeanProperty(java.lang.Object startingObject, java.lang.String scopedMethodName) Gets the bean property.
static java.lang.Integer	getDateDiff(java.util.Calendar cal1, java.util.Calendar cal2, int datePart) Calculates the difference between two dates.
static int	getDaysInMonth(int year, int month)
static java.lang.StringBuffer	getMethodSignature(java.lang.String functionName, java.util.List functionArgs) Returns a method signature for the method name, and args
static void	initConstants(java.util.Map<java.lang.String,java.lang.Integer> expConstants)
static java.lang.Object	invokeStaticFunction(ELContext elContext, java.lang.String classname, java.lang.String functionName, java.util.List functionArgs)
static boolean	matchLike(java.lang.String searchFieldValue, java.lang.String searchValue) String search with wild card support.
static java.lang.Boolean	matchRegularExpression(java.lang.String input, java.lang.String regxString) Returns true if the input string is matched by the regular expression.
static java.lang.String	toBeanGetterName(java.lang.String basicName) Converts the basic method name to a getter method name.
static java.util.Date	toDate(java.lang.String dateStr) Parses a date string using the formatters initialized in the config class.
static java.lang.String	unEscape(java.lang.String str) Unescape any \", \' \n \r sequences

Methods inherited from class java.lang.Object

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

Field Detail

CAST_BIGDECIMAL

public static final int CAST_BIGDECIMAL

See Also:

Constant Field Values

CAST_BIGINTEGER

public static final int CAST_BIGINTEGER

See Also:

Constant Field Values

CAST_BYTE

public static final int CAST_BYTE

See Also:

Constant Field Values

CAST_DOUBLE

public static final int CAST_DOUBLE

See Also:

Constant Field Values

CAST_FLOAT

public static final int CAST_FLOAT

See Also:

Constant Field Values

CAST_INTEGER

public static final int CAST_INTEGER

See Also:

Constant Field Values

CAST_LONG

public static final int CAST_LONG

See Also:

Constant Field Values

CAST_SHORT

public static final int CAST_SHORT

See Also:

Constant Field Values

Method Detail

addStaticMethods

public static void addStaticMethods(java.lang.Class staticClasss,
                                    java.util.Map<java.lang.String,java.lang.String> functionMap,
                                    java.util.List<java.lang.String> functionNames)

Adds all public static methods declared in the specified class to the EL's function map.

Parameters:

staticClasss -

functionMap -

matchLike

public static boolean matchLike(java.lang.String searchFieldValue,
                                java.lang.String searchValue)

String search with wild card support. This supports both leading, and / or trailing wild card characters. Either * or % can be used as a wild card.

Parameters:

searchFieldValue - the value to search in

searchValue - the value to search for

Returns:

true if the search value is found in the search field value

matchRegularExpression

public static java.lang.Boolean matchRegularExpression(java.lang.String input,
                                                       java.lang.String regxString)
                                                throws java.lang.Exception

Returns true if the input string is matched by the regular expression.

Parameters:

input - the value to search in

regxString - the regular expression to match

Returns:

true if the search value is found in the search field value

Throws:

java.lang.Exception

unEscape

public static java.lang.String unEscape(java.lang.String str)

Unescape any \", \' \n \r sequences

Parameters:

str - the string to unescape

Returns:

the unescaped string

toDate

public static java.util.Date toDate(java.lang.String dateStr)

Parses a date string using the formatters initialized in the config class.

Parameters:

dateStr - the date string

Returns:

the Date value, null if the date string cannot be parsed by one of the formatters

initConstants

public static void initConstants(java.util.Map<java.lang.String,java.lang.Integer> expConstants)

getBeanProperty

public static java.lang.Object getBeanProperty(java.lang.Object startingObject,
                                               java.lang.String scopedMethodName)
                                        throws java.lang.IllegalArgumentException

Gets the bean property.

Parameters:

startingObject - the source, or starting object to execute the method on

scopedMethodName - the method name of the form = "customer.order.account.foo";

Returns:

the property returned from the last getter, eg. getFoo()

Throws:

java.lang.IllegalArgumentException

toBeanGetterName

public static java.lang.String toBeanGetterName(java.lang.String basicName)

Converts the basic method name to a getter method name.

Parameters:

basicName - the basic name

Returns:

the getter name

invokeStaticFunction

public static java.lang.Object invokeStaticFunction(ELContext elContext,
                                                    java.lang.String classname,
                                                    java.lang.String functionName,
                                                    java.util.List functionArgs)
                                             throws java.lang.ClassNotFoundException,
                                                    java.lang.IllegalArgumentException,
                                                    java.lang.IllegalAccessException,
                                                    java.lang.reflect.InvocationTargetException

Throws:

java.lang.ClassNotFoundException

java.lang.IllegalArgumentException

java.lang.IllegalAccessException

java.lang.reflect.InvocationTargetException

getMethodSignature

public static java.lang.StringBuffer getMethodSignature(java.lang.String functionName,
                                                        java.util.List functionArgs)

Returns a method signature for the method name, and args

Parameters:

functionName - the function name

functionArgs - the arg type

Returns:

the method signature for the method name, and args

getDateDiff

public static java.lang.Integer getDateDiff(java.util.Calendar cal1,
                                            java.util.Calendar cal2,
                                            int datePart)

Calculates the difference between two dates.

Parameters:

cal1 - the first calendar

cal2 - the second calendar

datePart - the date part to calculate the difference for

Returns:

the difference

getDaysInMonth

public static int getDaysInMonth(int year,
                                 int month)