Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 3

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.fmap.dal.feature;

import java.io.File;

import java.util.Iterator;

import java.util.List;

import java.util.function.Predicate;

import org.cresques.cts.IProjection;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.tools.dataTypes.DataType;

import org.gvsig.tools.dynobject.DynClass;

import org.gvsig.tools.dynobject.DynStruct_v2;

import org.gvsig.tools.evaluator.Evaluator;

import org.gvsig.tools.util.UnmodifiableBasicList;

/**

 * <p>

 * This interface provides all the information that describes the structure of a

 * type of feature, methods for managing it and also offers a variety of utility

 * methods for simplicity's sake.

 * </p>

 *

 * <p>

 * The relevant information that compounds a FeatureType includes:

 * </p>

 *

 * <ul>

 * <li> {@link FeatureAttributeDescriptor}(s)

 * <li> {@link FeatureRule}(s)

 * <li> Its size

 * <li> Its SRS(s)

 * <li> Its identifier

 * <li> Whether features of this type have an OID or not (identifier assigned by

 * the store).

 * </ul>

 *

 * <p>

 * Methods for management include:

 * </p>

 *

 * <ul>

 * <li>Obtaining its editable instance.

 * <li>Obtaining an iterator over its attributes.

 * <li>Knowing whether this FeatureType has any associated evaluator for

 * calculated attributes.

 * </ul>

 *

 * <p>

 * Utility methods include:

 * </p>

 *

 * <ul>

 * <li>Getting a copy of the FeatureType.

 * <li>Getting the default geometry attribute.

 * <li>Getting the default spatial reference system.

 * </ul>

 */

public interface FeatureType extends DynClass, DynStruct_v2, UnmodifiableBasicList<FeatureAttributeDescriptor> {

    public static final Predicate<FeatureAttributeDescriptor> BASIC_TYPES_FILTER = new Predicate<FeatureAttributeDescriptor>() {

        @Override

        public boolean test(FeatureAttributeDescriptor attrdesc) {

            DataType t = attrdesc.getDataType();

            boolean r = !(t.isContainer() || t.isDynObject() || t.isObject());

            return r;

        }

    };

    public static Predicate<FeatureAttributeDescriptor> ALL_FILTER = new Predicate<FeatureAttributeDescriptor>() {

        @Override

        public boolean test(FeatureAttributeDescriptor t) {

            return true;

        }

    };

    /**

     * Returns a new copy of this FeatureType

     *

     * @return a new copy of this FeatureType

     */

    public FeatureType getCopy();

    public void copyFrom(FeatureType other);

    /**

     * Returns a {@link FeatureRules} containing all rules applicable to

     * features of this type.

     *

     * @return a {@link FeatureRules} containing all rules applicable to

     * features of this type.

     */

    public FeatureRules getRules();

    /**

     * Returns an editable instance of this FeatureType. Any modifications on a

     * FeatureType must be done through its editable instance.

     *

     * @return the editable instance of this FeatureType.

     *

     * @see EditableFeatureType

     */

    public EditableFeatureType getEditable();

    /**

     * Given the name of an attribute, this method returns its position in this

     * FeatureType.

     *

     * @param name of the attribute

     * @return position of the attribute

     */

    public int getIndex(String name);

    /**

     * Returns an attribute descriptor given its name.

     *

     * @param name of the attribute

     * @return descriptor of the attribute, a

     * {@link FeatureAttributeDescriptor}.

     */

    public Object get(String name);

    /**

     * Returns an attribute descriptor given its index

     *

     * @param index of the attribute

     *

     * @return descriptor of the attribute, a {@link FeatureAttributeDescriptor}

     */

    public FeatureAttributeDescriptor get(int index);

    /**

     * Returns a {@link FeatureAttributeDescriptor} given the attribute name, or

     * null if an attribute with the given name does not exist.

     *

     * @param name of the attribute

     *

     * @return a {@link FeatureAttributeDescriptor}

     */

    public FeatureAttributeDescriptor getAttributeDescriptor(String name);

    /**

     * Returns a {@link FeatureAttributeDescriptor} given the attribute index.

     *

     * @param index of the attribute

     *

     * @return a {@link FeatureAttributeDescriptor}

     */

    public FeatureAttributeDescriptor getAttributeDescriptor(int index);

    /**

     * Returns the name of the given the attribute index.

     * If the index is incorrect, return null.

     * 

     * @param index of the attribute

     *

     * @return a String with the name of attribute

     */

    public String getAttributeName(int index);

    /**

     * Returns an iterator over this FeatureType's attributes. Elements returned

     * by this iterator are of type {@link FeatureAttributeDescriptor}.

     *

     * @return An iterator over this FeatureType's

     * {@link FeatureAttributeDescriptor}s.

     */

    public Iterator iterator();

    /**

     * Returns this FeatureType size. The size of a FeatureType is determined by

     * its number of attributes.

     *

     * @return this FeatureType size, defined as the number of attributes it is

     * composed of.

     *

     */

    public int size();

    public boolean isEmpty();

    /**

     * Returns this FeatureType identifier. This identifier must always be equal

     * to a store.

     *

     * @return the identifier.

     */

    public String getId();

    /**

     * Returns the name of the attribute that will be used as default geometry

     * attribute for those processes that require a geometry (for instance

     * rendering).

     *

     * @return name of the default geometry attribute.

     */

    public String getDefaultGeometryAttributeName();

    /**

     * Returns the index of the attribute that will be used as default geometry

     * attribute.

     *

     * @return index of the default geometry attribute.

     */

    public int getDefaultGeometryAttributeIndex();

    /**

     * Returns a list with the SRSs in which this FeatureType geometries are

     * expressed. Normally there may be one SRS for each attribute of type

     * {@link Geometry}.

     *

     * @return a list with the SRS in which this FeatureType geometries are

     * expressed.

     */

    public List getSRSs();

    /**

     * Returns the SRS in which the default geometry attribute is expressed.

     *

     * @return the SRS in which the default geometry attribute is expressed,

     * null if not has a default geometry attribute.

     */

    public IProjection getDefaultSRS();

    /**

     * Indicates whether this FeatureType has any assigned {@link Evaluator}(s).

     * Evaluators are used to obtain the values for calculated attributes.

     *

     * @return true if this FeatureType has any assigned {@link Evaluator}(s).

     */

    public boolean hasEvaluators(); // FIXME: Quitar del interface y dejar en DefaultFeatureType

    /**

     * Indicates whether {@link Feature}(s) of this FeatureType have an OID

     * defined. An OID is the Feature unique identifier.

     *

     * Some stores provide their own OIDs which are always unique (such as

     * Postgre) while others don't support this concept and then it is the

     * library who creates runtime ad-hoc OIDs as it see fits, but then

     * integrity of this OIDs among different work sessions cannot be guaranteed

     * (this is the case for shape files).

     *

     * @return true if this FeatureType has an OID defined, false otherwise.

     *

     */

    public boolean hasOID();

    /**

     * Incicates if attibutes with automatic values are allowed in the source

     *

     * @return true if source supports this feature, false otherwise

     */

    public boolean allowAutomaticValues();

    /**

     * Returns an Array of the FeatureAttributeDescriptor

     *

     * @return

     */

    public FeatureAttributeDescriptor[] getAttributeDescriptors();

    /**

     * Returns an Array of the FeatureAttributeDescriptor that compounds the

     * primary key. If not have primary keys return a empty array.

     *

     * @return

     */

    public FeatureAttributeDescriptor[] getPrimaryKey();

    public boolean hasPrimaryKey();

    public boolean supportReferences();

    /**

     * Returns the default geometry FeatureAttributeDescriptor. Return null if

     * it's not set

     *

     * @return

     */

    public FeatureAttributeDescriptor getDefaultGeometryAttribute();

    /**

     * Returns the default time FeatureAttributeDescriptor. Return null if it's

     * not set.

     *

     * @return the default time attribute

     */

    public FeatureAttributeDescriptor getDefaultTimeAttribute();

    /**

     * Returns the name of the attribute that will be used as default geometry

     * attribute for those processes that require a geometry (for instance

     * rendering).

     *

     * @return name of the default geometry attribute.

     */

    public String getDefaultTimeAttributeName();

    /**

     * Returns the index of the attribute that will be used as default geometry

     * attribute.

     *

     * @return index of the default geometry attribute.

     */

    public int getDefaultTimeAttributeIndex();

    /**

     * Return the store associated to this type.

     *

     * @return the FeatureStore of the type.

     */

    public FeatureStore getStore();

    public List<FeatureAttributeDescriptor> getFilteredAttributes(

            Predicate<FeatureAttributeDescriptor> filter,

            int max

    );

    public List<FeatureAttributeDescriptor> getRecentUseds();

    FeatureStore getAsFeatureStore();

    public String getNewFieldName();

    /**

     * Return the original feature type of this type.

     * It will return Null when the store it's in not editing mode

     * or the featureType has not been change

     * 

     * @return the original FeatureType of the type.

     */

    public FeatureType getOriginalFeatureType();

    public boolean hasOnlyMetadataChanges(FeatureType other);

    public void writeAsDALFile(File file);

    public FeatureExtraColumn getExtraColumn();

}