org.apache.tapestry.binding
Class AbstractBinding

java.lang.Object
  org.apache.tapestry.binding.AbstractBinding

All Implemented Interfaces:

IBinding, ILocatable

Direct Known Subclasses:

ExpressionBinding, FieldBinding, ListenerBinding, StaticBinding, StringBinding

public abstract class AbstractBinding
extends Object
implements IBinding

Base class for IBinding implementations.

Version:

$Id: AbstractBinding.java 243791 2004-02-19 17:38:13Z hlship $

Author:

Howard Lewis Ship

Constructor Summary

protected

AbstractBinding(ILocation location)

Method Summary

protected BindingException	createReadOnlyBindingException(IBinding binding)
boolean	getBoolean() Cooerces the raw value into a true or false, according to the rules set by Tapestry.evaluateBoolean(Object).
double	getDouble() Gets the value of the Binding using IBinding.getObject() and coerces it to a double.
int	getInt() Gets the value of the Binding using IBinding.getObject() and coerces it to an int.
ILocation	getLocation() Returns the location from which this object orginates, or null if not known.
Object	getObject(String parameterName, Class type) Returns the value for the binding after performing some basic checks.
String	getString() Gets the value for the binding.
boolean	isInvariant() Default implementation: returns true.
boolean	isWrapper(Class primitiveType, Class subjectClass)
void	setBoolean(boolean value) Constructs a Boolean and invokes IBinding.setObject(Object).
void	setDouble(double value) Constructs an Double and invokes IBinding.setObject(Object).
void	setInt(int value) Constructs an Integer and invokes IBinding.setObject(Object).
void	setObject(Object value) Updates the value of the binding, if possible.
void	setString(String value) Invokes IBinding.setObject(Object).

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tapestry.IBinding

getObject

Constructor Detail

AbstractBinding

protected AbstractBinding(ILocation location)

Since:

3.0

Method Detail

getLocation

public ILocation getLocation()

Description copied from interface: ILocatable

Returns the location from which this object orginates, or null if not known.

Specified by:

getLocation in interface ILocatable

getBoolean

public boolean getBoolean()

Cooerces the raw value into a true or false, according to the rules set by Tapestry.evaluateBoolean(Object).

Specified by:

getBoolean in interface IBinding

See Also:

Tapestry.evaluateBoolean(Object)

getInt

public int getInt()

Description copied from interface: IBinding

Gets the value of the Binding using IBinding.getObject() and coerces it to an int. Strings will be parsed, and other java.lang.Number classes will have intValue() invoked.

Specified by:

getInt in interface IBinding

getDouble

public double getDouble()

Description copied from interface: IBinding

Gets the value of the Binding using IBinding.getObject() and coerces it to a double. Strings will be parsed, and other java.lang.Number classes will have doubleValue() invoked.

Specified by:

getDouble in interface IBinding

getString

public String getString()

Gets the value for the binding. If null, returns null, otherwise, returns the String (toString()) version of the value.

Specified by:

getString in interface IBinding

setBoolean

public void setBoolean(boolean value)

Description copied from interface: IBinding

Constructs a Boolean and invokes IBinding.setObject(Object).

Specified by:

setBoolean in interface IBinding

Throws:

BindingException - always.

setInt

public void setInt(int value)

Description copied from interface: IBinding

Constructs an Integer and invokes IBinding.setObject(Object).

Specified by:

setInt in interface IBinding

Throws:

BindingException - always.

setDouble

public void setDouble(double value)

Description copied from interface: IBinding

Constructs an Double and invokes IBinding.setObject(Object).

Specified by:

setDouble in interface IBinding

Throws:

BindingException - always.

setString

public void setString(String value)

Description copied from interface: IBinding

Invokes IBinding.setObject(Object).

Specified by:

setString in interface IBinding

Throws:

BindingException - always.

setObject

public void setObject(Object value)

Description copied from interface: IBinding

Updates the value of the binding, if possible.

Specified by:

setObject in interface IBinding

Throws:

BindingException - always.

isInvariant

public boolean isInvariant()

Default implementation: returns true.

Specified by:

isInvariant in interface IBinding

Since:

2.0.3

getObject

public Object getObject(String parameterName,
                        Class type)

Description copied from interface: IBinding

Returns the value for the binding after performing some basic checks.

Specified by:

getObject in interface IBinding

Parameters:

parameterName - the name of the parameter (used to build the message if an exception is thrown).

type - if not null, the value must be assignable to the specific class

isWrapper

public boolean isWrapper(Class primitiveType,
                         Class subjectClass)

createReadOnlyBindingException

protected BindingException createReadOnlyBindingException(IBinding binding)

Since:

3.0