gvsig-scripting / org.gvsig.scripting.app / trunk / org.gvsig.scripting.app / org.gvsig.scripting.app.extension / src / main / resources-plugin / scripting / lib / gvsig_2_1_0 / vectorial / schema.py @ 451
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from org.gvsig.fmap.dal.feature.impl import DefaultFeatureType as JSchema |
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from org.gvsig.fmap.dal.feature.impl import DefaultEditableFeatureType as JEditableSchema |
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from org.gvsig.fmap.dal import DataTypes |
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from org.gvsig.app import ApplicationLocator |
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class Schema(JSchema): |
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"""
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Stores the definition of the attributes of a feature store.
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This definition es read-only. If need to modify get a editable
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copy of this with getEditable.
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Extends the `java FeatureType`_ class.
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.. _`java FeatureType` : FIXME_URL
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"""
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@staticmethod
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def __getitem__(self, name): |
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return self.getAttributeDescriptor(name) |
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@staticmethod
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def __iter__(self): |
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return iter(self.getAttributeDescriptors()) |
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@staticmethod
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def __len__(self): |
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return len(self.getAttributeDescriptors()) |
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@staticmethod
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def get(self, name, default=None): |
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"""
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Returns a feature attribute descriptor that contains information about
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one feature attribute, such as its name, data type or precision.
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:parameters:
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name : string
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name of the attribute of the feature
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default : object
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default value to return when no attribute of name exists in the feature.
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Default value is None.
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:return:
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The FeatureAttributeDescriptor requested
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:returntype:
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FeatureAttributeDescriptor_
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.. _FeatureAttributeDescriptor : FIXME_URL
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"""
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x = self.getAttributeDescriptor(name)
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if x == None: |
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return default
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return x
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@staticmethod
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def getAttrNames(self): |
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"""
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Returns a list with name of attributes in the schema
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:return:
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The names of the attributes
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:returntype:
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string
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"""
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if not self.getAttributeDescriptors(): |
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return None |
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return [attr.getName() for attr in self.getAttributeDescriptors()] |
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@staticmethod
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def __call__(self): |
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"""
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Return the java object represented by this object.
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This method is for compatibility with scripting API of gvSIG 2.0
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:ReturnType:
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Schema
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:deprecated:
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With gvSIG 2.1 the call this method isn't necesary
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"""
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return self |
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class EditableSchema(JEditableSchema): |
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"""
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Stores the definition of the attributes of a feature store.
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This is an editable definition of the schema.
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Extends the `java EditableFeatureType`_ class.
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.. _`java EditableFeatureType` : FIXME_URL
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"""
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@staticmethod
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def append(self, name, type, size=None, default=None, precision=4): |
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"""
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Adds a new attribute to the feature definition.
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:parameters:
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name : string
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name of the new attribute
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type : int, string, DataType_
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the type of the new attribute
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size : int
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if the attribute is a string, length of this
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default : object
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default value for the new attribute
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precision : int
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the precision for types double and float.
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:return:
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the new FeatureAttributeDescriptor
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:returntype:
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EditableFeatureAttributeDescriptor_
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.. _EditableFeatureAttributeDescriptor : FIXME_URL
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.. _DataType : FIXME_URL
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"""
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application = ApplicationLocator.getManager() |
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datamanager = application.getDataManager() |
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dataTypes = application.getDataTypesManager() |
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if isinstance(type, str): |
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try:
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type = dataTypes.getType(type) # dataType constant value from string |
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type = dataTypes.get(type)
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except:
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raise RuntimeError( |
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"Feature Property Data type (%s) is not valid. name=%s, type=%s, size=%s, default=%s)" % (
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type,
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name, |
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type,
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size, |
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default |
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) |
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) |
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elif isinstance(type, int): |
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try:
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type = dataTypes.get(type)
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except:
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raise RuntimeError( |
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"Data type (%s) is not valid. name=%s, type=%s, size=%s, default=%s)" % (
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type,
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name, |
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type,
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size, |
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default |
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) |
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) |
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elif !isinstance(type,DataType): |
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raise RuntimeError( |
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"Data type (%s) is not valid. name=%s, type=%s, size=%s, default=%s)" % (
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type,
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name, |
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type,
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size, |
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default |
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) |
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) |
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attribute = self.add(name, type.getType()) |
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if size != None: |
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attribute.setSize(size) |
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if default != None: |
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attribute.setDefaultValue(default) |
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if precision != None and type.getType() in (DataTypes.DOUBLE, DataTypes.FLOAT): |
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attribute.setPrecision(precision) |
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if type.getType() == DataTypes.GEOMETRY and self.getDefaultGeometryAttributeName()==None: |
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self.setDefaultGeometryAttributeName(name)
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return attribute
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@staticmethod
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def __call__(self): |
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"""
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Return the java object represented by this object.
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This method is for compatibility with scripting API of gvSIG 2.0
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:ReturnType:
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EditableSchema
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:deprecated:
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With gvSIG 2.1 the call this method isn't necesary
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"""
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return self |
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#
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# Inject new methods in the class JSchema
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#
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JSchema.__call__ = Schema.__call__ |
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JSchema.__iter__ = Schema.__iter__ |
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JSchema.__len__ = Schema.__len__ |
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JSchema.get = Schema.get |
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JSchema.getAttrNames = Schema.getAttrNames |
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#
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# Inject new methods in the class JSchema
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#
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JEditableSchema.__call__ = EditableSchema.__call__ |
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JEditableSchema.__iter__ = EditableSchema.__iter__ |
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JEditableSchema.__len__ = EditableSchema.__len__ |
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JEditableSchema.get = EditableSchema.get |
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JEditableSchema.getAttrNames = EditableSchema.getAttrNames |
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JEditableSchema.append = EditableSchema.append |
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