Package org.geotools.parameter
Class Parameter<T>
- Object
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- Formattable
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- AbstractParameter
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- Parameter<T>
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- Type Parameters:
T
- The value type.
- All Implemented Interfaces:
Serializable
,Cloneable
,GeneralParameterValue
,ParameterValue<T>
,Cloneable
public class Parameter<T> extends AbstractParameter implements ParameterValue<T>
A parameter value used by an operation method. Most CRS parameter values are numeric, but other types of parameter values are possible. The parameter type can be fetch with thegetValue().getClass()
idiom. ThegetValue()
andsetValue(Object)
methods can be invoked at any time. Others getters and setters are parameter-type dependents.- Since:
- 2.1
- Author:
- Martin Desruisseaux (IRD), Jody Garnett (Refractions Research)
- See Also:
DefaultParameterDescriptor
,ParameterGroup
, Serialized Form
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Field Summary
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Fields inherited from class Formattable
SINGLE_LINE
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Constructor Summary
Constructors Constructor Description Parameter(ParameterDescriptor<T> descriptor)
Constructs a parameter value from the specified descriptor.Parameter(ParameterDescriptor<T> descriptor, T value)
Constructs a parameter value from the specified descriptor and value.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
booleanValue()
Returns the boolean value of an operation parameter.Parameter
clone()
Returns a clone of this parameter.static Parameter<Double>
create(String name, double value, Unit<?> unit)
Constructs a parameter from the specified name and value.static Parameter<Integer>
create(String name, int value)
Constructs a parameter from the specified name and value.static <T extends CodeList>
Parameter<T>create(String name, Class<T> type, T value)
Constructs a parameter from the specified code list.double
doubleValue()
Returns the numeric value of the coordinate operation parameter with its associated unit of measure.double
doubleValue(Unit<?> unit)
Returns the numeric value of the coordinate operation parameter in the specified unit of measure.double[]
doubleValueList()
Returns an ordered sequence of two or more numeric values of an operation parameter list, where each value has the same associated unit of measure.double[]
doubleValueList(Unit<?> unit)
Returns an ordered sequence of numeric values in the specified unit of measure.static <T> T
ensureValidValue(ParameterDescriptor<T> descriptor, Object value)
Ensures that the given value is valid according the specified parameter descriptor.boolean
equals(Object object)
Compares the specified object with this parameter for equality.ParameterDescriptor<T>
getDescriptor()
Returns the abstract definition of this parameter.Unit<?>
getUnit()
Returns the unit of measure of the parameter value.T
getValue()
Returns the parameter value as an object.int
hashCode()
Returns a hash value for this parameter.int
intValue()
Returns the positive integer value of an operation parameter, usually used for a count.int[]
intValueList()
Returns an ordered sequence of two or more integer values of an operation parameter list, usually used for counts.void
setValue(boolean value)
Sets the parameter value as a boolean.void
setValue(double value)
Sets the parameter value as a floating point.void
setValue(double[] values, Unit<?> unit)
Set the parameter value as an array of floating point and their associated unit.void
setValue(double value, Unit<?> unit)
Sets the parameter value as a floating point and its associated unit.void
setValue(int value)
Sets the parameter value as an integer.void
setValue(Object value)
Set the parameter value as an object.String
stringValue()
Returns the string value of an operation parameter.URI
valueFile()
Returns a reference to a file or a part of a file containing one or more parameter values.-
Methods inherited from class AbstractParameter
formatWKT, toString, write
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Methods inherited from class Formattable
cleanupThreadLocals, toWKT, toWKT, toWKT, toWKT
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Constructor Detail
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Parameter
public Parameter(ParameterDescriptor<T> descriptor)
Constructs a parameter value from the specified descriptor. The value will be initialized to the default value, if any.- Parameters:
descriptor
- The abstract definition of this parameter.
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Parameter
public Parameter(ParameterDescriptor<T> descriptor, T value) throws InvalidParameterValueException
Constructs a parameter value from the specified descriptor and value.- Parameters:
descriptor
- The abstract definition of this parameter.value
- The parameter value.- Throws:
InvalidParameterValueException
- if the type ofvalue
is inappropriate for this parameter, or if the value is illegal for some other reason (for example the value is numeric and out of range).
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Method Detail
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create
public static Parameter<Integer> create(String name, int value)
Constructs a parameter from the specified name and value. This convenience constructor creates aDefaultParameterDescriptor
object. But if such an object is available, then the preferred way to get aParameterValue
is to invokeParameterDescriptor.createValue()
.- Parameters:
name
- The parameter name.value
- The parameter value.- Returns:
- A new parameter instance for the given name and value.
- Since:
- 2.5
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create
public static Parameter<Double> create(String name, double value, Unit<?> unit)
Constructs a parameter from the specified name and value. This convenience constructor creates aDefaultParameterDescriptor
object. But if such an object is available, then the preferred way to get aParameterValue
is to invokeParameterDescriptor.createValue()
.- Parameters:
name
- The parameter name.value
- The parameter value.unit
- The unit for the parameter value.- Returns:
- A new parameter instance for the given name and value.
- Since:
- 2.5
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create
public static <T extends CodeList> Parameter<T> create(String name, Class<T> type, T value)
Constructs a parameter from the specified code list. This convenience constructor creates aDefaultParameterDescriptor
object. But if such an object is available, then the preferred way to get aParameterValue
is to invokeParameterDescriptor.createValue()
.- Type Parameters:
T
- The parameter type.- Parameters:
name
- The parameter name.type
- The parameter type.value
- The parameter value.- Returns:
- A new parameter instance for the given name and value.
- Since:
- 2.5
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ensureValidValue
public static <T> T ensureValidValue(ParameterDescriptor<T> descriptor, Object value) throws InvalidParameterValueException
Ensures that the given value is valid according the specified parameter descriptor. This convenience method ensures thatvalue
is assignable to the expected class, is between the minimum and maximum values and is one of the set of valid values. If the value fails any of those tests, then an exception is thrown.This method is similar to
Parameters#isValid(descriptor, value)
except that the exception contains an error message formatted with a description of the failure reason.- Type Parameters:
T
- The type of parameter value. The givenvalue
should typically be an instance of this class. This is not required by this method signature but is checked by this method implementation.- Parameters:
descriptor
- The parameter descriptor to check against.value
- The value to check, ornull
.- Returns:
- The value casted to the descriptor parameterized type.
- Throws:
InvalidParameterValueException
- if the parameter value is invalid.
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getDescriptor
public ParameterDescriptor<T> getDescriptor()
Returns the abstract definition of this parameter.- Specified by:
getDescriptor
in interfaceGeneralParameterValue
- Specified by:
getDescriptor
in interfaceParameterValue<T>
- Overrides:
getDescriptor
in classAbstractParameter
- Returns:
- The abstract definition of this parameter or group of parameters.
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getUnit
public Unit<?> getUnit()
Returns the unit of measure of the parameter value. If the parameter value has no unit (for example because it is aString
type), then this method returnsnull
. Note that "no unit" doesn't means "dimensionless".- Specified by:
getUnit
in interfaceParameterValue<T>
- Returns:
- The unit of measure, or
null
if none. - See Also:
doubleValue()
,doubleValueList()
,getValue()
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doubleValue
public double doubleValue(Unit<?> unit) throws InvalidParameterTypeException
Returns the numeric value of the coordinate operation parameter in the specified unit of measure. This convenience method apply unit conversion on the fly as needed.- Specified by:
doubleValue
in interfaceParameterValue<T>
- Parameters:
unit
- The unit of measure for the value to be returned.- Returns:
- The numeric value represented by this parameter after conversion to type
double
and conversion tounit
. - Throws:
InvalidParameterTypeException
- if the value is not a numeric type.IllegalArgumentException
- if the specified unit is invalid for this parameter.- See Also:
getUnit()
,setValue(double,Unit)
,doubleValueList(Unit)
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doubleValue
public double doubleValue() throws InvalidParameterTypeException
Returns the numeric value of the coordinate operation parameter with its associated unit of measure.- Specified by:
doubleValue
in interfaceParameterValue<T>
- Returns:
- The numeric value represented by this parameter after conversion to type
double
. - Throws:
InvalidParameterTypeException
- if the value is not a numeric type.- See Also:
getUnit()
,setValue(double)
,doubleValueList()
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intValue
public int intValue() throws InvalidParameterTypeException
Returns the positive integer value of an operation parameter, usually used for a count. An integer value does not have an associated unit of measure.- Specified by:
intValue
in interfaceParameterValue<T>
- Returns:
- The numeric value represented by this parameter after conversion to type
int
. - Throws:
InvalidParameterTypeException
- if the value is not an integer type.- See Also:
setValue(int)
,intValueList()
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booleanValue
public boolean booleanValue() throws InvalidParameterTypeException
Returns the boolean value of an operation parameter. A boolean value does not have an associated unit of measure.- Specified by:
booleanValue
in interfaceParameterValue<T>
- Returns:
- The boolean value represented by this parameter.
- Throws:
InvalidParameterTypeException
- if the value is not a boolean type.- See Also:
setValue(boolean)
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stringValue
public String stringValue() throws InvalidParameterTypeException
Returns the string value of an operation parameter. A string value does not have an associated unit of measure.- Specified by:
stringValue
in interfaceParameterValue<T>
- Returns:
- The string value represented by this parameter.
- Throws:
InvalidParameterTypeException
- if the value is not a string.- See Also:
getValue()
,setValue(Object)
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doubleValueList
public double[] doubleValueList(Unit<?> unit) throws InvalidParameterTypeException
Returns an ordered sequence of numeric values in the specified unit of measure. This convenience method apply unit conversion on the fly as needed.- Specified by:
doubleValueList
in interfaceParameterValue<T>
- Parameters:
unit
- The unit of measure for the value to be returned.- Returns:
- The sequence of values represented by this parameter after conversion to type
double
and conversion tounit
. - Throws:
InvalidParameterTypeException
- if the value is not an array ofdouble
s.IllegalArgumentException
- if the specified unit is invalid for this parameter.- See Also:
getUnit()
,setValue(double[],Unit)
,doubleValue(Unit)
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doubleValueList
public double[] doubleValueList() throws InvalidParameterTypeException
Returns an ordered sequence of two or more numeric values of an operation parameter list, where each value has the same associated unit of measure.- Specified by:
doubleValueList
in interfaceParameterValue<T>
- Returns:
- The sequence of values represented by this parameter.
- Throws:
InvalidParameterTypeException
- if the value is not an array ofdouble
s.- See Also:
getUnit()
,setValue(Object)
,doubleValue()
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intValueList
public int[] intValueList() throws InvalidParameterTypeException
Returns an ordered sequence of two or more integer values of an operation parameter list, usually used for counts. These integer values do not have an associated unit of measure.- Specified by:
intValueList
in interfaceParameterValue<T>
- Returns:
- The sequence of values represented by this parameter.
- Throws:
InvalidParameterTypeException
- if the value is not an array ofint
s.- See Also:
setValue(Object)
,intValue()
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valueFile
public URI valueFile() throws InvalidParameterTypeException
Returns a reference to a file or a part of a file containing one or more parameter values. When referencing a part of a file, that file must contain multiple identified parts, such as an XML encoded document. Furthermore, the referenced file or part of a file can reference another part of the same or different files, as allowed in XML documents.- Specified by:
valueFile
in interfaceParameterValue<T>
- Returns:
- The reference to a file containing parameter values.
- Throws:
InvalidParameterTypeException
- if the value is not a reference to a file or an URI.- See Also:
getValue()
,setValue(Object)
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getValue
public T getValue()
Returns the parameter value as an object. The object type is typically aDouble
,Integer
,Boolean
,String
,URI
,double[]
orint[]
.- Specified by:
getValue
in interfaceParameterValue<T>
- Returns:
- The parameter value as an object.
- See Also:
setValue(Object)
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setValue
public void setValue(double value, Unit<?> unit) throws InvalidParameterValueException
Sets the parameter value as a floating point and its associated unit.- Specified by:
setValue
in interfaceParameterValue<T>
- Parameters:
value
- The parameter value.unit
- The unit for the specified value.- Throws:
InvalidParameterValueException
- if the floating point type is inappropriate for this parameter, or if the value is illegal for some other reason (for example a value out of range).- See Also:
setValue(double)
,doubleValue(Unit)
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setValue
public void setValue(double value) throws InvalidParameterValueException
Sets the parameter value as a floating point. The unit, if any, stay unchanged.- Specified by:
setValue
in interfaceParameterValue<T>
- Parameters:
value
- The parameter value.- Throws:
InvalidParameterValueException
- if the floating point type is inappropriate for this parameter, or if the value is illegal for some other reason (for example a value out of range).- See Also:
setValue(double,Unit)
,doubleValue()
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setValue
public void setValue(int value) throws InvalidParameterValueException
Sets the parameter value as an integer.- Specified by:
setValue
in interfaceParameterValue<T>
- Parameters:
value
- The parameter value.- Throws:
InvalidParameterValueException
- if the integer type is inappropriate for this parameter, or if the value is illegal for some other reason (for example a value out of range).- See Also:
intValue()
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setValue
public void setValue(boolean value) throws InvalidParameterValueException
Sets the parameter value as a boolean.- Specified by:
setValue
in interfaceParameterValue<T>
- Parameters:
value
- The parameter value.- Throws:
InvalidParameterValueException
- if the boolean type is inappropriate for this parameter.- See Also:
booleanValue()
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setValue
public void setValue(Object value) throws InvalidParameterValueException
Set the parameter value as an object. The object type is typically aDouble
,Integer
,Boolean
,String
,URI
,double[]
orint[]
.- Specified by:
setValue
in interfaceParameterValue<T>
- Parameters:
value
- The parameter value.- Throws:
InvalidParameterValueException
- if the type ofvalue
is inappropriate for this parameter, or if the value is illegal for some other reason (for example the value is numeric and out of range).- See Also:
getValue()
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setValue
public void setValue(double[] values, Unit<?> unit) throws InvalidParameterValueException
Set the parameter value as an array of floating point and their associated unit.- Specified by:
setValue
in interfaceParameterValue<T>
- Parameters:
values
- The parameter values.unit
- The unit for the specified value.- Throws:
InvalidParameterValueException
- if the floating point type is inappropriate for this parameter, or if the value is illegal for some other reason (for example a value out of range).
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equals
public boolean equals(Object object)
Compares the specified object with this parameter for equality.- Overrides:
equals
in classAbstractParameter
- Parameters:
object
- The object to compare tothis
.- Returns:
true
if both objects are equal.
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hashCode
public int hashCode()
Returns a hash value for this parameter.- Overrides:
hashCode
in classAbstractParameter
- Returns:
- The hash code value. This value doesn't need to be the same in past or future versions of this class.
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clone
public Parameter clone()
Returns a clone of this parameter.- Specified by:
clone
in interfaceCloneable
- Specified by:
clone
in interfaceGeneralParameterValue
- Specified by:
clone
in interfaceParameterValue<T>
- Overrides:
clone
in classAbstractParameter
- Returns:
- A copy of this parameter value or group.
- See Also:
Object.clone()
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