public abstract class DataType extends ProjectComponent implements java.lang.Cloneable
This class handles the common description attribute and provides a default implementation for reference handling and checking for circular references that is appropriate for types that can not be nested inside elements of the same type (i.e. <patternset> but not <path>).
Modifier and Type | Field and Description |
---|---|
protected boolean |
checked
Deprecated.
since 1.7.
The user should not be directly referencing
variable. Please use
setChecked(boolean) or
isChecked() instead. |
protected Reference |
ref
Deprecated.
since 1.7.
The user should not be directly referencing
variable. Please use
getRefid() instead. |
description, location, project
Constructor and Description |
---|
DataType() |
Modifier and Type | Method and Description |
---|---|
protected void |
checkAttributesAllowed()
check that it is ok to set attributes, i.e that no reference is defined
|
protected void |
checkChildrenAllowed()
check that it is ok to add children, i.e that no reference is defined
|
protected BuildException |
circularReference()
Creates an exception that indicates the user has generated a
loop of data types referencing each other.
|
java.lang.Object |
clone() |
protected void |
dieOnCircularReference()
Convenience method.
|
protected void |
dieOnCircularReference(Project p)
Convenience method.
|
protected void |
dieOnCircularReference(java.util.Stack<java.lang.Object> stack,
Project project)
Check to see whether any DataType we hold references to is
included in the Stack (which holds all DataType instances that
directly or indirectly reference this instance, including this
instance itself).
|
protected java.lang.Object |
getCheckedRef()
Performs the check for circular references and returns the
referenced object.
|
protected <T> T |
getCheckedRef(java.lang.Class<T> requiredClass,
java.lang.String dataTypeName)
Performs the check for circular references and returns the
referenced object.
|
protected <T> T |
getCheckedRef(java.lang.Class<T> requiredClass,
java.lang.String dataTypeName,
Project project)
Performs the check for circular references and returns the
referenced object.
|
protected java.lang.Object |
getCheckedRef(Project p)
Performs the check for circular references and returns the
referenced object.
|
protected java.lang.String |
getDataTypeName()
Gets as descriptive as possible a name used for this datatype instance.
|
Reference |
getRefid()
get the reference set on this object
|
static void |
invokeCircularReferenceCheck(DataType dt,
java.util.Stack<java.lang.Object> stk,
Project p)
Allow DataTypes outside org.apache.tools.ant.types to indirectly call
dieOnCircularReference on nested DataTypes.
|
protected boolean |
isChecked()
The flag that is used to indicate that circular references have been checked.
|
boolean |
isReference()
Has the refid attribute of this element been set?
|
protected BuildException |
noChildrenAllowed()
Creates an exception that indicates that this XML element must
not have child elements if the refid attribute is set.
|
static void |
pushAndInvokeCircularReferenceCheck(DataType dt,
java.util.Stack<java.lang.Object> stk,
Project p)
Allow DataTypes outside org.apache.tools.ant.types to indirectly call
dieOnCircularReference on nested DataTypes.
|
protected void |
setChecked(boolean checked)
Set the flag that is used to indicate that circular references have been checked.
|
void |
setRefid(Reference ref)
Set the value of the refid attribute.
|
protected BuildException |
tooManyAttributes()
Creates an exception that indicates that refid has to be the
only attribute if it is set.
|
java.lang.String |
toString()
Basic DataType toString().
|
getDescription, getLocation, getProject, log, log, setDescription, setLocation, setProject
@Deprecated protected Reference ref
getRefid()
instead.@Deprecated protected boolean checked
setChecked(boolean)
or
isChecked()
instead.Subclasses are responsible for setting this value to false if we'd need to investigate this condition (usually because a child element has been added that is a subclass of DataType).
public boolean isReference()
public void setRefid(Reference ref)
Subclasses may need to check whether any other attributes
have been set as well or child elements have been created and
thus override this method. if they do the must call
super.setRefid
.
ref
- the reference to useprotected java.lang.String getDataTypeName()
String
name.protected void dieOnCircularReference()
protected void dieOnCircularReference(Project p)
p
- the Ant Project instance against which to resolve references.protected void dieOnCircularReference(java.util.Stack<java.lang.Object> stack, Project project) throws BuildException
If one is included, throw a BuildException created by circularReference
.
This implementation is appropriate only for a DataType that cannot hold other DataTypes as children.
The general contract of this method is that it shouldn't do
anything if checked
is true and
set it to true on exit.
stack
- the stack of references to check.project
- the project to use to dereference the references.BuildException
- on error.public static void invokeCircularReferenceCheck(DataType dt, java.util.Stack<java.lang.Object> stk, Project p)
dt
- the DataType to check.stk
- the stack of references to check.p
- the project to use to dereference the references.BuildException
- on error.public static void pushAndInvokeCircularReferenceCheck(DataType dt, java.util.Stack<java.lang.Object> stk, Project p)
Pushes dt on the stack, runs dieOnCircularReference and pops it again.
dt
- the DataType to check.stk
- the stack of references to check.p
- the project to use to dereference the references.BuildException
- on error.protected java.lang.Object getCheckedRef()
BuildException
- if the reference is invalid (circular ref, wrong class, etc).protected java.lang.Object getCheckedRef(Project p)
p
- the Ant Project instance against which to resolve references.BuildException
- if the reference is invalid (circular ref, wrong class, etc).protected <T> T getCheckedRef(java.lang.Class<T> requiredClass, java.lang.String dataTypeName)
T
- required reference typerequiredClass
- the class that this reference should be a subclass of.dataTypeName
- the name of the datatype that the reference should be
(error message use only).BuildException
- if the reference is invalid (circular ref, wrong class, etc).protected <T> T getCheckedRef(java.lang.Class<T> requiredClass, java.lang.String dataTypeName, Project project)
T
- required reference typerequiredClass
- the class that this reference should be a subclass of.dataTypeName
- the name of the datatype that the reference should be
(error message use only).project
- the fallback Project instance for dereferencing.BuildException
- if the reference is invalid (circular ref, wrong class, etc),
or if project
is null
.protected BuildException tooManyAttributes()
protected BuildException noChildrenAllowed()
protected BuildException circularReference()
protected boolean isChecked()
protected void setChecked(boolean checked)
checked
- if true, if circular references have been checkedpublic Reference getRefid()
protected void checkAttributesAllowed()
BuildException
- if not allowedprotected void checkChildrenAllowed()
BuildException
- if not allowedpublic java.lang.String toString()
toString
in class java.lang.Object
public java.lang.Object clone() throws java.lang.CloneNotSupportedException
clone
in class ProjectComponent
java.lang.CloneNotSupportedException
- if there is a problem.