Application: gvSIG desktop

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

import java.lang.ref.WeakReference;

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.impl.featureset.DynObjectFeatureFacade;

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

import org.gvsig.fmap.geom.Geometry;

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

import org.gvsig.timesupport.Instant;

import org.gvsig.timesupport.Interval;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dataTypes.CoercionException;

import org.gvsig.tools.dataTypes.DataTypesManager;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.evaluator.Evaluator;

import org.gvsig.tools.evaluator.EvaluatorData;

import org.gvsig.tools.evaluator.EvaluatorException;

public class DefaultFeature implements Feature, EvaluatorData {

        private static DataTypesManager dataTypesManager = null; 

        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;

        }

        protected DataTypesManager getDataTypesManager() {

                if( dataTypesManager==null ) {

                        dataTypesManager = ToolsLocator.getDataTypesManager();

                }

                return dataTypesManager;

        }

        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.getFeatureAttributeGetter() != null){

            value = attribute.getFeatureAttributeGetter().setter(value);                    

        }

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

            this.data.set(i, value);

            return;

        }

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

            try {

                value =

                    this.getDataTypesManager().coerce(attribute.getType(),

                        value);

            } catch (CoercionException e) {

                throw new IllegalArgumentException("Can't convert to "

                    + this.getDataTypesManager().getTypeName(

                        attribute.getType()) + " from '"

                    + value.getClass().getName() + "' with value '"

                    + value.toString() + "'.", e);

            }

                }

        this.data.set(i, value);

    }

    private Object get(int index,Class theClass, int type) {

        Object value = this.get(index);

        if( theClass.isInstance(value) ) {

            return value;

        }

        try {

            return this.getDataTypesManager().coerce(type, value);

        } catch (CoercionException e) {

            throw new IllegalArgumentException(

                    "Can't convert to "+theClass.getSimpleName()+" from '"+value.getClass().getName()+"' with value '"+value.toString()+"'.",

                    e);

        }

    }

//  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()+".");

        }

        FeatureAttributeDescriptor attribute = type.getAttributeDescriptor(index);

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

            return get(attribute, this.data.get(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 get(attribute, this.data.get(index));

            }

            try {

                value = eval.evaluate(this);

            } catch (EvaluatorException e) {

                throw new DataEvaluatorRuntimeException(e);

            }

            this.data.set(index, value);

            return  get(attribute, value);

        }                

    }

    private Object get(FeatureAttributeDescriptor featureAttributeDescriptor, Object value){

        if (featureAttributeDescriptor.getFeatureAttributeGetter() == null){

            return value;

        }else{

            return featureAttributeDescriptor.getFeatureAttributeGetter().getter(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,Boolean.class,DataTypes.BOOLEAN));

        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,Byte.class,DataTypes.BYTE));

        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) {

        Date value = ((Date) this.get(index,Date.class,DataTypes.DATE));

        return value;

    }

    public double getDouble(String name) {

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

    }

    public double getDouble(int index) {

        Double value = ((Double) this.get(index,Double.class,DataTypes.DOUBLE));

        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,Float.class,DataTypes.FLOAT));

        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,Geometry.class,DataTypes.GEOMETRY);

    }

    public int getInt(String name) {

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

    }

    public int getInt(int index) {

        Integer value = ((Integer) this.get(index,Integer.class,DataTypes.INT));

        if (value == null) {

            return 0;

        }

        return ((Integer)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,Long.class,DataTypes.LONG));

        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,String.class,DataTypes.STRING);

    }

    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;

    }

    public Instant getInstant(int index) {

        return ((Instant) this.get(index,Date.class,DataTypes.INSTANT));

    }

    public Instant getInstant(String name) {

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

    }

    public Interval getInterval(int index) {

        return ((Interval) this.get(index,Date.class,DataTypes.INTERVAL));

    }

    public Interval getInterval(String name) {

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

    }

    public DynObject getAsDynObject() {

        DynObjectFeatureFacade facade = new DynObjectFeatureFacade();

        facade.setFeature(this);

        return facade;

    }

    public String toString() {

        StringBuffer buffer = new StringBuffer("Feature with values: ");

        FeatureAttributeDescriptor[] attributeDescriptors =

            getType().getAttributeDescriptors();

        for (int i = 0; i < attributeDescriptors.length; i++) {

            String name = attributeDescriptors[i].getName();

            buffer.append(name).append("=").append(get(name));

            if (i < attributeDescriptors.length - 1) {

                buffer.append(", ");

            }

        }

        return super.toString();

    }

}