Example usage for com.mongodb DBCollection find

Introduction

In this page you can find the example usage for com.mongodb DBCollection find.

Prototype

@Deprecated
public DBCursor find(final DBObject query, final DBObject projection, final int numToSkip,
        final int batchSize) 

Source Link

Document

Select documents in collection and get a cursor to the selected documents.

Usage

From source file:com.edgytech.umongo.CollectionPanel.java

License:Apache License

public void find(final ButtonBase button) {
    final DBCollection col = getCollectionNode().getCollection();
    final DBObject query = ((DocBuilderField) getBoundUnit(Item.findQuery)).getDBObject();
    final DBObject fields = ((DocBuilderField) getBoundUnit(Item.findFields)).getDBObject();
    final DBObject sort = ((DocBuilderField) getBoundUnit(Item.findSort)).getDBObject();
    final DBObject hint = ((DocBuilderField) getBoundUnit(Item.findHint)).getDBObject();
    final int skip = getIntFieldValue(Item.findSkip);
    final int limit = getIntFieldValue(Item.findLimit);
    final int batchSize = getIntFieldValue(Item.findBatchSize);
    final boolean explain = getBooleanFieldValue(Item.findExplain);
    final boolean export = getBooleanFieldValue(Item.findExport);

    if (export) {
        exportToFile(col, query, fields, sort, skip, limit, batchSize);
    } else {// ww w. ja va  2  s  .c o m
        new DbJob() {
            @Override
            public Object doRun() {
                // this does not actually block, may not need dbjob
                DBCursor cur = col.find(query, fields, skip, batchSize);
                if (sort != null) {
                    cur.sort(sort);
                }
                if (limit > 0) {
                    cur.limit(limit);
                }
                if (hint != null) {
                    cur.hint(hint);
                }
                if (explain) {
                    return cur.explain();
                }

                // force cursor to start
                cur.hasNext();
                return cur;
            }

            @Override
            public String getNS() {
                return col.getFullName();
            }

            @Override
            public String getShortName() {
                return "Find";
            }

            @Override
            public DBObject getRoot(Object result) {
                if (result == null || !(result instanceof DBCursor)) {
                    return null;
                }
                DBCursor res = (DBCursor) result;
                BasicDBObject obj = new BasicDBObject("cursorId", res.getCursorId());
                obj.put("server", res.getServerAddress().toString());
                obj.put("query", res.getQuery());
                obj.put("fields", res.getKeysWanted());
                obj.put("options", res.getOptions());
                obj.put("readPreference", res.getReadPreference().toDBObject());
                obj.put("numSeen", res.numSeen());
                obj.put("numGetMores", res.numGetMores());
                // want skip, limit, batchsize
                return obj;
            }

            @Override
            public ButtonBase getButton() {
                return button;
            }
        }.addJob();

    }
}

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