echopointng.stylesheet.propertypeer
Class AbstractCssPropertyPeer

java.lang.Object
  echopointng.stylesheet.propertypeer.AbstractCssPropertyPeer

All Implemented Interfaces:

CssPropertyPeer

Direct Known Subclasses:

AlignmentPeer, BooleanPeer, BorderPeer, CharacterPeer, ColorPeer, ExtentPeer, FillImagePeer, FontPeer, ImageReferencePeer, InsetsPeer, LocalePeer, NumberPeer, StringPeer, TypefacePeer

public abstract class AbstractCssPropertyPeer
extends java.lang.Object
implements CssPropertyPeer

AbstractCssPropertyPeer is a base class for PropertyPeers

Constructor Summary

AbstractCssPropertyPeer()

Method Summary

protected abstract boolean	canConvert(CssObjectIntrospector ci, java.lang.String propertyValue) Is the propertyValue valid in its current form?
protected static java.lang.String	getConstantFromMap(java.util.Map constantMap, int intValue)
protected static java.lang.String	getConstantFromMap(java.util.Map constantMap, java.lang.Object equalsTo) Looks into a Map of constant values to object values and returns the key that matches the given object value
protected java.lang.Object	getConstantValue(CssObjectIntrospector ci, java.lang.Class conversionClass, java.lang.String propertyValue, int lineNo) Converts a property string value into a name class field constant of the supplied name.
protected abstract java.lang.Class	getConversionClass() What is an assignable conversion class for this peer
protected static int	getInteger(java.lang.String propertyValue) Returns the int value of the given propertyValue string.
protected static int	getIntFromMap(java.util.Map constantMap, java.lang.Object key) Can be called to return an int from a Map of Integer objects.
java.lang.Object	getJavaObject(java.lang.ClassLoader classLoader, java.lang.Class objectClass, java.lang.String propertyValue, int lineNo) This method is called to convert the CSS string value into a specific Java object.
protected abstract java.lang.Object	getObject(CssObjectIntrospector ci, java.lang.String propertyValue) Returns an instance of the converted property value.
protected static CssPropertyPeer	getPeer(java.lang.Class peerClass)
protected java.lang.String	getString(CssObjectIntrospector ci, java.lang.Object object) Get a string representation of the object.
java.lang.String	getStyleString(java.lang.ClassLoader classLoader, java.lang.Class objectClass, java.lang.Object propertyValue) This is called to convert a current Java object into a CSS property value string.
protected static boolean	isAssignableFrom(java.lang.Object value, java.lang.Class targetClass) Returns true if value Object is assignable to the target class.
protected static boolean	isExtent(java.lang.String extentStr) Returns true of the specified string is an extent string
protected static boolean	isInteger(java.lang.String propertyValue) Returns true if the propertyValue is a valid representation of a base 10 Integer value.
protected static boolean	isNullString(java.lang.String propertyValue) Returns TRUE if the propertyValue is the null string
protected static Extent	makeExtent(java.lang.String extentStr) Makes an Extent from a string
protected static java.lang.String[]	tokenize(java.lang.String tokenStr, java.lang.String delims) Tokenizes a given string with the specified delimeters.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCssPropertyPeer

public AbstractCssPropertyPeer()

Method Detail

getJavaObject

public java.lang.Object getJavaObject(java.lang.ClassLoader classLoader,
                                      java.lang.Class objectClass,
                                      java.lang.String propertyValue,
                                      int lineNo)
                               throws CssInvalidValueException

Description copied from interface: CssPropertyPeer

This method is called to convert the CSS string value into a specific Java object.

Specified by:

getJavaObject in interface CssPropertyPeer

Parameters:

classLoader - - the class loader in use

objectClass - - the current object class in question

propertyValue - - the CSS value string

lineNo - - the line no within the parsed CSS input

Returns:

a specific Object of the correct type

Throws:

CssInvalidValueException - - if the value cannot be converted.

See Also:

CssPropertyPeer.getJavaObject(ClassLoader, Class, String, int)

getStyleString

public java.lang.String getStyleString(java.lang.ClassLoader classLoader,
                                       java.lang.Class objectClass,
                                       java.lang.Object propertyValue)

Description copied from interface: CssPropertyPeer

This is called to convert a current Java object into a CSS property value string.

Specified by:

getStyleString in interface CssPropertyPeer

Parameters:

classLoader - - the class loader in use

objectClass - - the current object class in question

propertyValue - - the CSS value string

Returns:

a string in the right Css property value string format

See Also:

getStyleString(java.lang.ClassLoader, java.lang.Class, java.lang.Object)

getConversionClass

protected abstract java.lang.Class getConversionClass()

What is an assignable conversion class for this peer

Returns:

- a conversion class

canConvert

protected abstract boolean canConvert(CssObjectIntrospector ci,
                                      java.lang.String propertyValue)

Is the propertyValue valid in its current form?

Parameters:

ci - - The component Intropector

propertyValue - - the value to inspect

Returns:

true if its a valid, convertable value

getObject

protected abstract java.lang.Object getObject(CssObjectIntrospector ci,
                                              java.lang.String propertyValue)

Returns an instance of the converted property value. canConvert() will have been called before this is called and hence no sanity checks need be performed again.

Parameters:

ci - - a object intropector for you to use

propertyValue - - the value to convert into an object

Returns:

the converted value

getString

protected java.lang.String getString(CssObjectIntrospector ci,
                                     java.lang.Object object)

Get a string representation of the object. This default implementation returns String.valueOf(object) or "null";

Parameters:

ci - - the CssObjectIntrospector available

object - - the object to get a string representation of.

Returns:

- the string representation

getConstantValue

protected java.lang.Object getConstantValue(CssObjectIntrospector ci,
                                            java.lang.Class conversionClass,
                                            java.lang.String propertyValue,
                                            int lineNo)
                                     throws CssInvalidValueException

Converts a property string value into a name class field constant of the supplied name.

Parameters:

ci - - the componen

conversionClass -

propertyValue -

lineNo -

Returns:

a string contant into a value

Throws:

CssInvalidValueException

isAssignableFrom

protected static boolean isAssignableFrom(java.lang.Object value,
                                          java.lang.Class targetClass)

Returns true if value Object is assignable to the target class. If the value is null, then it is always assignable.

Parameters:

value - - the object to test

targetClass - - the target assignable class

Returns:

true if its assignable or false

isNullString

protected static boolean isNullString(java.lang.String propertyValue)

Returns TRUE if the propertyValue is the null string

isInteger

protected static boolean isInteger(java.lang.String propertyValue)

Returns true if the propertyValue is a valid representation of a base 10 Integer value.

getInteger

protected static int getInteger(java.lang.String propertyValue)

Returns the int value of the given propertyValue string. The IsInteger method should be called to check the value beforehand.

getConstantFromMap

protected static java.lang.String getConstantFromMap(java.util.Map constantMap,
                                                     java.lang.Object equalsTo)

Looks into a Map of constant values to object values and returns the key that matches the given object value

Parameters:

constantMap - - the Map is assumed to have String keys

equalsTo - - the object to perform .equals() on

Returns:

the key or a String.valueOf(equalsTo)

getConstantFromMap

protected static java.lang.String getConstantFromMap(java.util.Map constantMap,
                                                     int intValue)

See Also:

getConstantFromMap(Map, Object)

getIntFromMap

protected static int getIntFromMap(java.util.Map constantMap,
                                   java.lang.Object key)

Can be called to return an int from a Map of Integer objects. You will want to be pretty sure the key is in there or BANG!

Parameters:

constantMap - - the Map to look in

key - - the lookup key

Returns:

and int for that key

tokenize

protected static java.lang.String[] tokenize(java.lang.String tokenStr,
                                             java.lang.String delims)

Tokenizes a given string with the specified delimeters.

Parameters:

tokenStr - - the string to tokenize

delims - - the delimeters to use

Returns:

an array of string tokens

isExtent

protected static boolean isExtent(java.lang.String extentStr)

Returns true of the specified string is an extent string

makeExtent

protected static Extent makeExtent(java.lang.String extentStr)

Makes an Extent from a string

getPeer

protected static CssPropertyPeer getPeer(java.lang.Class peerClass)