| gvSIG desktop 1

package org.gvsig.fmap.dal.feature.impl;

import java.lang.ref.WeakReference;

import java.text.ParseException;

import java.util.Date;

import java.util.Iterator;

import java.util.List;

import org.cresques.cts.IProjection;

import org.gvsig.fmap.dal.DataTypes;

import org.gvsig.fmap.dal.exception.DataEvaluatorRuntimeException;

import org.gvsig.fmap.dal.feature.EditableFeature;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;

import org.gvsig.fmap.dal.feature.FeatureReference;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.dal.feature.FeatureType;

import org.gvsig.fmap.dal.feature.exception.IllegalValueException;

import org.gvsig.fmap.dal.feature.exception.SetReadOnlyAttributeException;

import org.gvsig.fmap.dal.feature.spi.FeatureProvider;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.primitive.Envelope;

import org.gvsig.tools.dynobject.DynClass;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.dynobject.exception.DynFieldNotFoundException;

import org.gvsig.tools.dynobject.exception.DynMethodException;

import org.gvsig.tools.evaluator.Evaluator;

import org.gvsig.tools.evaluator.EvaluatorData;

import org.gvsig.tools.evaluator.EvaluatorException;

public class DefaultFeature implements Feature, EvaluatorData {

        protected FeatureProvider data;

        protected FeatureReference reference;

        private WeakReference storeRef;

        /*

         * Usar con mucha precaucion o mejor no usar. Lo precisa el

         * DefaultFeatureSet en la ordenacion.

         */

        public DefaultFeature(FeatureStore store) {

                this.storeRef = new WeakReference(store);

                this.reference = null;

        }

        public DefaultFeature(FeatureStore store, FeatureProvider data) {

                this.data = data;

                this.storeRef = new WeakReference(store);

                this.reference = null;

        }

        DefaultFeature(DefaultFeature feature) {

                this.data = feature.data.getCopy();

                this.storeRef = feature.storeRef;

                this.reference = feature.reference;

        }

        public void setData(FeatureProvider data) {

                this.data = data;

                this.reference = null;

        }

        public FeatureProvider getData() {

                return this.data;

        }

        void set(FeatureAttributeDescriptor attribute, Object value) {

                int i = attribute.getIndex();

                if (attribute.isReadOnly()) {

                        throw new SetReadOnlyAttributeException();

                }

                if (attribute.getEvaluator() != null) {

                        throw new SetReadOnlyAttributeException();

                }

                if (value == null) {

                        if (!attribute.allowNull()) {

                                if (!attribute.isAutomatic()) {

                                        throw new IllegalValueException(attribute, value);

                                }

                        }

                        this.data.set(i, null);

                        return;

                }

                if (attribute.getObjectClass().isInstance(value)) {

                        this.data.set(i, value);

                        return;

                }

                if ((Number.class.isAssignableFrom(attribute.getObjectClass()) && Number.class.isAssignableFrom(value.getClass()))

                                || (attribute.getType()==DataTypes.STRING && Number.class.isAssignableFrom(value.getClass()))) {

                        Object number=getNumberByType((Number)value, attribute.getType());

                        this.data.set(i, number);

                        return;

                }

                if (!(value instanceof String)) {

                        throw new IllegalValueException(attribute, value);

                }

                int dataType = attribute.getType();

                switch (dataType) {

                case DataTypes.BYTE:

                        this.data.set(i, Byte.valueOf((String) value));

                        break;

                case DataTypes.DATE:

                        try {

                                this.data.set(i, attribute.getDateFormat()

                                                .parse((String) value));

                        } catch (ParseException e) {

                                throw new IllegalValueException(attribute, value, e);

                        }

                        break;

                case DataTypes.DOUBLE:

                        this.data.set(i, Double.valueOf((String) value));

                        break;

                case DataTypes.FLOAT:

                        this.data.set(i, Float.valueOf((String) value));

                        break;

                case DataTypes.INT:

                        this.data.set(i, Integer.valueOf((String) value));

                        break;

                case DataTypes.LONG:

                        this.data.set(i, Long.valueOf((String) value));

                        break;

                default:

                        throw new IllegalValueException(attribute, value);

                }

        }

        private Object getNumberByType(Number value, int type) {

                if (type==DataTypes.DOUBLE){

                        return new Double(value.doubleValue());

                }else if (type==DataTypes.FLOAT){

                        return new Float(value.floatValue());

                }else if (type==DataTypes.LONG){

                        return new Long(value.longValue());

                }else if (type==DataTypes.INT){

                        return new Integer(value.intValue());

                }else if (type==DataTypes.STRING){

                        return value.toString();

                }

                return value;

        }

        public void initializeValues() {

                FeatureType type = this.getType();

                Iterator iterator = type.iterator();

                while (iterator.hasNext()) {

                        FeatureAttributeDescriptor attribute = (FeatureAttributeDescriptor) iterator

                        .next();

                        if (attribute.isAutomatic() || attribute.isReadOnly()

                                        || attribute.getEvaluator() != null) {

                                continue;

                        }

                        if (attribute.getDefaultValue() == null && !attribute.allowNull()) {

                                continue;

                        }

                        this.set(attribute, attribute.getDefaultValue());

                }

        }

        public void clear() {

                initializeValues();

        }

        public void initializeValues(Feature feature) {

                FeatureType myType=this.getType();

                FeatureType type =feature.getType();

                Iterator iterator = type.iterator();

                while (iterator.hasNext()) {

                        FeatureAttributeDescriptor attribute = (FeatureAttributeDescriptor) iterator

                        .next();

                        FeatureAttributeDescriptor myAttribute=myType.getAttributeDescriptor(attribute.getName());

                        if (myAttribute != null) {

                                this.set(myAttribute, feature.get(attribute.getIndex()));

                        }

                }

        }

        public FeatureStore getStore() {

                return (FeatureStore) this.storeRef.get();

        }

        public FeatureType getType() {

                return this.data.getType();

        }

        public EditableFeature getEditable() {

                return new DefaultEditableFeature(this);

        }

        public Feature getCopy() {

                return new DefaultFeature(this);

        }

        public FeatureReference getReference() {

                if (this.reference == null) {

                        this.reference = new DefaultFeatureReference(this);

                }

                return this.reference;

        }

        public void validate(int mode) {

                ((DefaultFeatureType) this.data.getType()).validateFeature(this, mode);

        }

        public List getSRSs() {

                // TODO Auto-generated method stub

                return null;

        }

        public Envelope getDefaultEnvelope() {

                return this.data.getDefaultEnvelope();

        }

        public Geometry getDefaultGeometry() {

                return this.data.getDefaultGeometry();

        }

        public IProjection getDefaultSRS() {

                return this.data.getType().getDefaultSRS();

        }

        public List getGeometries() {

                // TODO Auto-generated method stub

                return null;

        }

        public Object get(String name) {

                int index = this.data.getType().getIndex(name);

                if( index < 0 ) {

                        throw new IllegalArgumentException("Attribute name '"+name+"' not found in the feature.");

                }

                return this.get(index);

        }

        public Object get(int index) {

                FeatureType type = this.data.getType();

                if( index <0 || index >= type.size() ) {

                        throw new IllegalArgumentException("Attribute index '"+index+"' out of range (0 to "+this.data.getType().size()+".");

                }

                if (!this.data.getType().hasEvaluators()) {

                        return this.data.get(index);

                }

                FeatureAttributeDescriptor attribute = type.getAttributeDescriptor(index);

                Evaluator eval = attribute.getEvaluator();

                if (eval == null) {

                        return this.data.get(index);

                } else {

                        Object value = this.data.get(index);

                        if (value != null) { // FIXME: para comprobar si esta calculado usar

                                                                        // un array

                                                                        // especifico.

                                return this.data.get(index);

                        }

                        try {

                                value = eval.evaluate(this);

                        } catch (EvaluatorException e) {

                                throw new DataEvaluatorRuntimeException(e);

                        }

                        this.data.set(index, value);

                        return value;

                }

        }

        public Object[] getArray(String name) {

                return this.getArray(this.data.getType().getIndex(name));

        }

        public Object[] getArray(int index) {

                return (Object[]) this.get(index);

        }

        public boolean getBoolean(String name) {

                return this.getBoolean(this.data.getType().getIndex(name));

        }

        public boolean getBoolean(int index) {

                Boolean value = (Boolean) this.get(index);

                if (value == null) {

                        return false;

                }

                return value.booleanValue();

        }

        public byte getByte(String name) {

                return this.getByte(this.data.getType().getIndex(name));

        }

        public byte getByte(int index) {

                Byte value = (Byte) this.get(index);

                if (value == null) {

                        return 0;

                }

                return value.byteValue();

        }

        public Date getDate(String name) {

                return this.getDate(this.data.getType().getIndex(name));

        }

        public Date getDate(int index) {

                return (Date) this.get(index);

        }

        public double getDouble(String name) {

                return this.getDouble(this.data.getType().getIndex(name));

        }

        public double getDouble(int index) {

                Double value = (Double) this.get(index);

                if (value == null) {

                        return 0;

                }

                return value.doubleValue();

        }

        public Feature getFeature(String name) {

                return this.getFeature(this.data.getType().getIndex(name));

        }

        public Feature getFeature(int index) {

                return (Feature) this.get(index);

        }

        public float getFloat(String name) {

                return this.getFloat(this.data.getType().getIndex(name));

        }

        public float getFloat(int index) {

                Float value = (Float) this.get(index);

                if (value == null) {

                        return 0;

                }

                return value.floatValue();

        }

        public Geometry getGeometry(String name) {

                return this.getGeometry(this.data.getType().getIndex(name));

        }

        public Geometry getGeometry(int index) {

                return (Geometry) this.get(index);

        }

        public int getInt(String name) {

                return this.getInt(this.data.getType().getIndex(name));

        }

        public int getInt(int index) {

                Integer value = (Integer) this.get(index);

                if (value == null) {

                        return 0;

                }

                return value.intValue();

        }

        public long getLong(String name) {

                return this.getLong(this.data.getType().getIndex(name));

        }

        public long getLong(int index) {

                Long value = (Long) this.get(index);

                if (value == null) {

                        return 0;

                }

                return value.longValue();

        }

        public String getString(String name) {

                return this.getString(this.data.getType().getIndex(name));

        }

        public String getString(int index) {

                return (String) this.get(index);

        }

        public Object getContextValue(String name) {

                name = name.toLowerCase();

                if (name.equals("store")) {

                        return this.getStore();

                }

                if (name.equals("featuretype")) {

                        return this.data.getType();

                }

                if (name.equals("feature")) {

                        return this;

                }

                throw new IllegalArgumentException(name);

        }

        public Iterator getDataNames() {

                class DataNamesIterator implements Iterator {

                        Iterator attributeIteraror;

                        DataNamesIterator(DefaultFeature feature) {

                                this.attributeIteraror = feature.getType().iterator();

                        }

                        public boolean hasNext() {

                                return this.attributeIteraror.hasNext();

                        }

                        public Object next() {

                                return ((FeatureAttributeDescriptor) this.attributeIteraror

                                                .next()).getName();

                        }

                        public void remove() {

                                throw new UnsupportedOperationException();

                        }

                }

                return new DataNamesIterator(this);

        }

        public Object getDataValue(String name) {

                name = name.toLowerCase();

                return get(name);

        }

        public Iterator getDataValues() {

                class DataValuesIterator implements Iterator {

                        DefaultFeature feature;

                        int current = 0;

                        DataValuesIterator(DefaultFeature feature) {

                                this.feature = feature;

                        }

                        public boolean hasNext() {

                                return current < feature.getType().size() - 1;

                        }

                        public Object next() {

                                return feature.get(current++);

                        }

                        public void remove() {

                                throw new UnsupportedOperationException();

                        }

                }

                return new DataValuesIterator(this);

        }

        public boolean hasContextValue(String name) {

                name = name.toLowerCase();

                if (name.equals("store")) {

                        return true;

                }

                if (name.equals("featuretype")) {

                        return true;

                }

                if (name.equals("feature")) {

                        return true;

                }

                return false;

        }

        public boolean hasDataValue(String name) {

                name = name.toLowerCase();

                return this.data.getType().getIndex(name) >= 0;

        }

        /**

         * Start of DynField interface Implementation

         * READONLY

         */

        public void delegate(DynObject dynObject) {

                throw new UnsupportedOperationException();

        }

        public DynClass getDynClass() {

                return (DynClass) getType();

        }

        public Object getDynValue(String name) throws DynFieldNotFoundException {

                return get(name);

        }

        public boolean hasDynValue(String name) {

                if (data.getType().getIndex(name)<0) {

                        return false;

                }

                return true;

        }

        public void implement(DynClass dynClass) {

                throw new UnsupportedOperationException();

        }

        public Object invokeDynMethod(String name, DynObject context)

                        throws DynMethodException {

                throw new UnsupportedOperationException();

        }

        public Object invokeDynMethod(int code, DynObject context)

                        throws DynMethodException {

                throw new UnsupportedOperationException();

        }

        public void setDynValue(String name, Object value)

                        throws DynFieldNotFoundException {

                throw new UnsupportedOperationException();

        }

}