public static SimpleFeatureType toReShapeFeatureType(
SimpleFeatureCollection delegate, List<Definition> definitionList) {
SimpleFeature sample = null;
SimpleFeatureIterator iterator = delegate.features();
try {
if (iterator.hasNext()) {
sample = iterator.next();
}
} finally {
iterator.close(); // good bye
}
SimpleFeatureTypeBuilder build = new SimpleFeatureTypeBuilder();
SimpleFeatureType origional = delegate.getSchema();
for (Definition def : definitionList) {
String name = def.name;
Expression expression = def.expression;
Object value = null;
if (sample != null) {
value = expression.evaluate(sample);
}
Class<?> binding = def.binding; // make use of any default binding hint provided by user
if (value == null) {
if (expression instanceof PropertyName) {
PropertyName propertyName = (PropertyName) expression;
String path = propertyName.getPropertyName();
AttributeDescriptor descriptor = origional.getDescriptor(name);
AttributeType attributeType = descriptor.getType();
binding = attributeType.getBinding();
}
} else {
binding = value.getClass();
}
if (binding == null) {
// note we could consider scanning through additional samples until we get a non null hit
throw new IllegalArgumentException("Unable to determine type for " + name);
}
if (Geometry.class.isAssignableFrom(binding)) {
CoordinateReferenceSystem crs;
AttributeType originalAttributeType = origional.getType(name);
if (originalAttributeType != null && originalAttributeType instanceof GeometryType) {
GeometryType geometryType = (GeometryType) originalAttributeType;
crs = geometryType.getCoordinateReferenceSystem();
} else {
crs = origional.getCoordinateReferenceSystem();
}
build.crs(crs);
build.add(name, binding);
} else {
build.add(name, binding);
}
}
build.setName(origional.getTypeName());
return build.buildFeatureType();
}
private void printAttributeDescriptor(Writer w, PropertyDescriptor attrib)
throws IOException {
print(w, attrib.getName().toString());
print(w, "\t");
print(w, FieldType.forBinding(attrib.getType().getBinding()).name());
print(w, "\t");
print(w, Integer.toString(attrib.getMinOccurs()));
print(w, "\t");
print(w, Integer.toString(attrib.getMaxOccurs()));
print(w, "\t");
print(w, Boolean.toString(attrib.isNillable()));
PropertyType attrType = attrib.getType();
if (attrType instanceof GeometryType) {
GeometryType gt = (GeometryType) attrType;
CoordinateReferenceSystem crs = gt.getCoordinateReferenceSystem();
String crsText = CrsTextSerializer.serialize(crs);
print(w, "\t");
println(w, crsText);
} else {
println(w, "");
}
}
/**
* Clones the given schema, changing the geometry attribute to match the given dimensionality.
*
* @param schema schema to clone
* @param dimensionality dimensionality for the geometry 1= points, 2= lines, 3= polygons
*/
private FeatureType cloneWithDimensionality(FeatureType schema, int dimensionality) {
SimpleFeatureType simpleFt = (SimpleFeatureType) schema;
SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
builder.setName(schema.getName());
builder.setCRS(schema.getCoordinateReferenceSystem());
for (AttributeDescriptor desc : simpleFt.getAttributeDescriptors()) {
if (isMixedGeometry(desc)) {
GeometryDescriptor geomDescriptor = (GeometryDescriptor) desc;
GeometryType geomType = geomDescriptor.getType();
Class<?> geometryClass = getGeometryForDimensionality(dimensionality);
GeometryType gt =
new GeometryTypeImpl(
geomType.getName(),
geometryClass,
geomType.getCoordinateReferenceSystem(),
geomType.isIdentified(),
geomType.isAbstract(),
geomType.getRestrictions(),
geomType.getSuper(),
geomType.getDescription());
builder.add(
new GeometryDescriptorImpl(
gt,
geomDescriptor.getName(),
geomDescriptor.getMinOccurs(),
geomDescriptor.getMaxOccurs(),
geomDescriptor.isNillable(),
geomDescriptor.getDefaultValue()));
} else {
builder.add(desc);
}
}
schema = builder.buildFeatureType();
return schema;
}
