root / branches / v2_0_0_prep / libraries / libFMap_dal / src / org / gvsig / fmap / dal / feature / impl / featureSet / DefaultFeatureSet.java @ 24496
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package org.gvsig.fmap.dal.feature.impl.featureSet; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.ConcurrentModificationException; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.NoSuchElementException; |
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import org.gvsig.fmap.dal.DataStore; |
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import org.gvsig.fmap.dal.exceptions.DataException; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureQuery; |
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import org.gvsig.fmap.dal.feature.FeatureSet; |
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import org.gvsig.fmap.dal.feature.FeatureStoreNotification; |
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import org.gvsig.fmap.dal.feature.FeatureType; |
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import org.gvsig.fmap.dal.feature.impl.DefaultFeatureIndexes; |
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import org.gvsig.fmap.dal.feature.impl.DefaultFeatureStore; |
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import org.gvsig.fmap.dal.feature.spi.FeatureSetProvider; |
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import org.gvsig.tools.exception.BaseException; |
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import org.gvsig.tools.observer.WeakReferencingObservable; |
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import org.gvsig.tools.observer.Observer; |
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import org.gvsig.tools.visitor.Visitor; |
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public class DefaultFeatureSet implements FeatureSet, Observer { |
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private static final int NO_CHECKED = -1; |
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private static final int DEFAULT = 0; |
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private static final int FILTERED = 1; |
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private static final int ORDERED = 2; |
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private static final int ORDERED_FILTERED = 3; |
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private static final int EDITED = 4; |
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private static final int EDITED_FILTERED = 5; |
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private static final int ORDERD_EDITED = 6; |
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private static final int ORDERED_EDITED_FILTER = 7; |
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private boolean modified = false; |
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DefaultFeatureStore store; |
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private List featureTypes; |
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FeatureQuery query; |
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FeatureSetProvider provider; |
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private long size = -1; |
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private int iteratorMode = NO_CHECKED; |
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List orderedData = null; |
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public DefaultFeatureSet(DefaultFeatureStore store, FeatureQuery query)
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throws DataException {
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this.store = store;
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this.query = query;
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this.featureTypes = new ArrayList(); |
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this.featureTypes.add(this.query.getFeatureType()); |
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if (query.hasFilter()) {
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this.provider = ((DefaultFeatureIndexes) store.getIndexes())
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.getFeatureSet(query.getFilter()); |
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} |
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if (this.provider == null) { |
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this.provider = this.store.getProvider().createSet(query); |
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} |
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} |
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public FeatureType getDefaultFeatureType() {
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return this.query.getFeatureType(); |
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} |
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public List getFeatureTypes() { |
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return Collections.unmodifiableList(this.featureTypes); |
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} |
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public long getSize() throws DataException { |
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if (size < 0) { |
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size = calculateSize(); |
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} |
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return size;
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} |
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private long calculateSize() throws DataException { |
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int mode = this.getIteratorMode(); |
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if ((mode & FILTERED) == FILTERED) {
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long mySize =0; |
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Iterator iter = this.fastIterator(); |
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try{
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while (true) { |
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iter.next(); |
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mySize++; |
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} |
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} catch (NoSuchElementException e){ |
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return mySize;
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} |
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} else if ((mode & EDITED) == EDITED) { |
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return provider.getSize()
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+ store.getFeatureManager().getDeltaSize(); |
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} |
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return provider.getSize();
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} |
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public void dispose() { |
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} |
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public boolean isFromStore(DataStore store) { |
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return this.store.equals(store); |
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} |
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public void update(WeakReferencingObservable obsevable, Object notification) { |
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if (modified) {
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return;
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} |
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String type = ((FeatureStoreNotification) notification).getType();
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if (type.equalsIgnoreCase(FeatureStoreNotification.AFTER_INSERT)
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|| type.equalsIgnoreCase(FeatureStoreNotification.AFTER_DELETE) |
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|| type |
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.equalsIgnoreCase(FeatureStoreNotification.RESOURCE_CHANGED)) {
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modified = true;
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} |
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} |
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public void accept(Visitor visitor) throws BaseException { |
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Iterator iterator = iterator();
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while (iterator.hasNext()) {
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Feature feature = (Feature) iterator.next(); |
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visitor.visit(feature); |
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} |
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} |
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protected void checkModified() { |
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if (modified) {
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throw new ConcurrentModificationException( |
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"FeatureCollection modified");
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} |
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} |
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public boolean isEmpty() throws DataException { |
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checkModified(); |
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if (this.store.isEditing()) { |
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if (this.store.getFeatureManager().hasNews()) { |
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return false; |
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} |
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if (this.provider.isEmpty()) { |
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return true; |
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} |
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return this.provider.getSize() |
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+ this.store.getFeatureManager().getDeltaSize() == 0; |
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} |
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return this.provider.isEmpty(); |
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} |
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public Iterator fastIterator() throws DataException { |
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return this.fastIterator(0); |
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} |
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public Iterator fastIterator(long index) throws DataException { |
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if (index < 0) { |
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throw new IndexOutOfBoundsException("The index (" + index |
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+ ") is less than 0");
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} |
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int mode = this.getIteratorMode(); |
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switch (mode) {
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case DEFAULT:
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return new FastDefaultIterator(this, index); |
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case FILTERED:
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return new FastFilteredIterator(this, index); |
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case ORDERED_FILTERED:
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return new FastOrderedIterator(this, new FastDefaultIterator(this, |
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0),
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index); |
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case EDITED:
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return new FastEditedIterator(this, index); |
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case EDITED_FILTERED:
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return new FastEditedFilteredIterator(this, index); |
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case ORDERD_EDITED:
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return new FastOrderedIterator(this, |
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new FastEditedIterator(this, 0), index); |
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case ORDERED_EDITED_FILTER:
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return new FastOrderedIterator(this, |
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new FastEditedFilteredIterator(this, 0), index); |
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default:
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throw new IllegalArgumentException(); |
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} |
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} |
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public Iterator iterator() throws DataException { |
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return this.iterator(0); |
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} |
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public Iterator iterator(long index) throws DataException { |
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if (index < 0) { |
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throw new IndexOutOfBoundsException("The index (" + index |
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+ ") is less than 0");
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} |
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int mode = this.getIteratorMode(); |
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switch (mode) {
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case DEFAULT:
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return new DefaultIterator(this, index); |
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case FILTERED:
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return new FilteredIterator(this, index); |
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case ORDERED_FILTERED:
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return new OrderedIterator(this, new DefaultIterator(this, 0), |
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index); |
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case EDITED:
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return new EditedIterator(this, index); |
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case EDITED_FILTERED:
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return new EditedFilteredIterator(this, index); |
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case ORDERD_EDITED:
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return new OrderedIterator(this, |
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new EditedIterator(this, 0), index); |
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case ORDERED_EDITED_FILTER:
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return new OrderedIterator(this, |
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new EditedFilteredIterator(this, 0), index); |
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default:
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throw new IllegalArgumentException(); |
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} |
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} |
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private boolean providerCanOrder() { |
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return this.provider.canOrder(); |
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} |
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private boolean providerCanFilter() { |
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return this.provider.canFilter(); |
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} |
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private int getIteratorMode() { |
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if (this.iteratorMode != NO_CHECKED) { |
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return this.iteratorMode; |
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} |
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if (store.isEditing() && store.getFeatureManager().hasChanges()) {
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if (this.query.hasOrder()) { // En edicion siempre ordeno yo. |
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if (this.query.hasFilter()) { |
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return ORDERED_EDITED_FILTER;
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} else {
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return ORDERD_EDITED;
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} |
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} else {
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if (this.query.hasFilter()) { |
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return EDITED_FILTERED;
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} else {
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return EDITED;
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} |
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} |
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} else {
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boolean useMyFilter = this.query.hasFilter(); |
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boolean useMyOrder = this.query.hasOrder(); |
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if (this.providerCanOrder()) { |
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useMyOrder = false;
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} |
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if (this.providerCanFilter()) { |
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useMyFilter = false;
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} |
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if (useMyOrder) {
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if (useMyFilter) {
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return ORDERED_FILTERED;// ORDERED_FILTERED; |
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} else {
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return ORDERED;// ORDERED; |
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} |
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} else {
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if (useMyFilter) {
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return FILTERED;// FILTERED; |
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} else {
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return DEFAULT;// DEFAULT; |
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} |
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} |
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} |
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} |
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} |