package frame.object.data;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import chat.server.call.IJSONWriter;
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import chat.server.call.IJsonProvider;
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import frame.object.meta.EntityMeta;
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public class EntitySet implements Iterable<Entity>, IJsonProvider {
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protected EntityMeta entityMeta;
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protected List<Entity> entityList;
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protected int maxSize;
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protected Indexes indexes;
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public EntitySet(EntityMeta tableMeta) {
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this(tableMeta, -1);
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}
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public EntitySet(EntityMeta entityMeta, int maxSize) {
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this.entityMeta = entityMeta;
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if (maxSize > 0) {
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this.maxSize = maxSize;
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entityList = new ArrayList<Entity>(maxSize);
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}
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else {
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entityList = new ArrayList<Entity>(15);
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}
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indexes = new Indexes(this);
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}
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public Entity newEntity() {
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Entity entity = new Entity(entityMeta);
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return entity;
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}
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public Entity append() {
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Entity entity = new Entity(entityMeta);
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entityList.add(entity);
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return entity;
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}
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public Entity append(Entity entity) {
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entityList.add(entity);
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indexes.setDirty();
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return entity;
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}
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public Entity getEntity(int idx) {
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Entity entity = entityList.get(idx);
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if (entity == null || entity.isDeleted()) {
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return null;
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}
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return entity;
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}
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public Entity getEntity(ID id) throws DataException {
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if (id == null) {
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return null;
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}
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Entity entity = indexes.getEntity("id", id.getValue());
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if (entity == null || entity.isDeleted()) {
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return null;
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}
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return entity;
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}
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public Entity getEntity(String field, Object value) throws DataException {
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if (field == null) {
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return null;
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}
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Entity entity = indexes.getEntity(field, value);
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if (entity == null || entity.isDeleted()) {
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return null;
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}
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return entity;
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}
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public void delete(ID id) throws DataException {
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if (id == null) {
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return;
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}
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Entity entity = indexes.getEntity("id", id.getValue());
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if (entity == null) {
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return;
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}
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entity.setDeleted();
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}
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public void clear() {
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entityList.clear();
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}
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public boolean isEmpty() {
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return entityList.isEmpty();
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}
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public boolean isFull() {
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return entityList.size() >= maxSize;
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}
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public String getTableName() {
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return entityMeta.getTableName();
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}
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public int getFieldCount() {
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return entityMeta.getFieldCount();
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}
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public EntityMeta getEntityMeta() {
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return entityMeta;
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}
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public List<Entity> getEntityList() {
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return entityList;
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}
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@Override
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public Iterator<Entity> iterator() {
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return new EntitySetIterator(this);
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}
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public int size() {
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return entityList.size();
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}
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public String[] getLowerNames() {
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return entityMeta.getLowerNames();
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}
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@Override
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public void writeJSONObject(IJSONWriter writer) {
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writer.beginArray();
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writeJSONData(writer);
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writer.endArray();
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}
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@Override
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public void writeJSONData(IJSONWriter writer) {
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int lineIndex = 0; int lineNo = 1;
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for (Entity entity : this) {
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writer.beginObject();
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writer.write("lineIndex", lineIndex++);
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writer.write("lineNo", lineNo++);
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entity.writeJSONData(writer);
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writer.endObject();
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}
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}
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}
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