Example usage for com.mongodb BasicDBObjectBuilder BasicDBObjectBuilder

Introduction

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

Prototype

public BasicDBObjectBuilder() 

Source Link

Document

Creates a builder intialized with an empty document.

Usage

From source file:com.examples.aggregation.AggregationExample.java

License:Open Source License

public Iterator<DBObject> doubleGroupStages() {
    BasicDBObjectBuilder group_1 = new BasicDBObjectBuilder();
    group_1.push("$group");
    group_1.push("_id");
    group_1.add("class_id", "$class_id");
    group_1.add("student_id", "$student_id");
    group_1.pop();/*from   w w w . j a  v a  2  s  .c o  m*/
    group_1.push("average");
    group_1.add("$avg", "$score");
    group_1.pop();
    group_1.pop();

    BasicDBObjectBuilder group_2 = new BasicDBObjectBuilder();
    group_2.push("$group");
    group_2.add("_id", "$_id.class_id");
    group_2.push("average");
    group_2.add("$avg", "$average");
    group_2.pop();
    group_2.pop();

    return col.aggregate(group_1.get(), group_2.get()).results().iterator();
}

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From source file:com.examples.aggregation.AggregationExample.java

License:Open Source License

public Iterator<DBObject> project() {
    BasicDBObjectBuilder builder = new BasicDBObjectBuilder();
    builder.push("$project");
    builder.add("_id", 0);
    builder.push("maker");
    builder.add("$toLower", "$manufacturer");
    builder.pop();/*w ww .  ja va  2s  .c  o m*/
    builder.push("details");
    builder.add("category", "$category");
    builder.push("price");
    builder.add("$multiply", new Object[] { "$price", 10 });
    builder.pop();
    builder.pop();
    builder.add("item", "$name");
    builder.pop();

    return col.aggregate(builder.get()).results().iterator();
}

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From source file:com.examples.aggregation.AggregationExample.java

License:Open Source License

public Iterator<DBObject> match() {
    BasicDBObjectBuilder match = buildMatchDBObject();
    BasicDBObjectBuilder group = new BasicDBObjectBuilder();
    group.push("$group");
    group.add("_id", "$city");
    group.push("population");
    group.add("$sum", "$pop");
    group.pop();//from w w  w  .ja va 2  s .  c om
    group.push("zip_codes");
    group.add("$addToSet", "$_id");
    group.pop();
    group.pop();

    return col.aggregate(match.get(), group.get()).results().iterator();
}

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From source file:com.examples.aggregation.AggregationExample.java

License:Open Source License

public Iterator<DBObject> sort() {
    BasicDBObjectBuilder match = buildMatchDBObject();

    BasicDBObjectBuilder group = new BasicDBObjectBuilder();
    group.push("$group");
    group.add("_id", "$city");
    group.push("population");
    group.add("$sum", "$pop");
    group.pop();/*from   w  ww  . j  a  v a2 s  .c o  m*/
    group.pop();

    BasicDBObjectBuilder project = new BasicDBObjectBuilder();
    project.push("$project");
    project.add("_id", 0);
    project.add("city", "$_id");
    project.add("population", 1);
    project.pop();

    BasicDBObjectBuilder sort = new BasicDBObjectBuilder();
    sort.push("$sort");
    sort.add("population", -1);
    sort.pop();

    return col.aggregate(match.get(), group.get(), project.get(), sort.get()).results().iterator();
}

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From source file:com.examples.aggregation.AggregationExample.java

License:Open Source License

public Iterator<DBObject> limitAndSkip() {
    BasicDBObjectBuilder match = buildMatchDBObject();

    BasicDBObjectBuilder group = new BasicDBObjectBuilder();
    group.push("$group");
    group.add("_id", "$city");
    group.push("population");
    group.add("$sum", "$pop");
    group.pop();//from   w  w w.  jav a  2  s  .co  m
    group.pop();

    BasicDBObjectBuilder project = new BasicDBObjectBuilder();
    project.push("$project");
    project.add("_id", 0);
    project.add("city", "$_id");
    project.add("population", 1);
    project.pop();

    BasicDBObjectBuilder sort = new BasicDBObjectBuilder();
    sort.push("$sort");
    sort.add("population", -1);
    sort.pop();

    BasicDBObject skip = new BasicDBObject("$skip", 10);
    BasicDBObject limit = new BasicDBObject("$limit", 5);

    return col.aggregate(match.get(), group.get(), project.get(), sort.get(), skip, limit).results().iterator();
}

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From source file:com.examples.aggregation.AggregationExample.java

License:Open Source License

private BasicDBObjectBuilder buildMatchDBObject() {
    BasicDBObjectBuilder match = new BasicDBObjectBuilder();
    match.push("$match");
    match.add("state", "NY");
    match.pop();// w ww. j ava2 s.com
    return match;
}

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From source file:com.examples.aggregation.AggregationExample.java

License:Open Source License

public Iterator<DBObject> unwind() {
    BasicDBObject unwind = new BasicDBObject("$unwind", "$tags");

    BasicDBObjectBuilder group = new BasicDBObjectBuilder();
    group.push("$group");
    group.add("_id", "$tags");
    group.push("count");
    group.add("$sum", 1);
    group.pop();/*from  w w w .  j a v  a 2s.co  m*/
    group.pop();

    BasicDBObjectBuilder sort = new BasicDBObjectBuilder();
    sort.push("$sort");
    sort.add("count", -1);
    sort.pop();

    BasicDBObject limit = new BasicDBObject("$limit", 10);

    BasicDBObjectBuilder project = new BasicDBObjectBuilder();
    project.push("$project");
    project.add("_id", 0);
    project.add("tag", "$_id");
    project.add("count", 1);

    return col.aggregate(unwind, group.get(), sort.get(), limit, project.get()).results().iterator();
}

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From source file:com.examples.aggregation.AggregationExample.java

License:Open Source License

public Iterator<DBObject> doubleUnwind() {

    BasicDBObject unwindSizes = new BasicDBObject("$unwind", "$sizes");
    BasicDBObject unwindColors = new BasicDBObject("$unwind", "$colors");

    BasicDBObjectBuilder group = new BasicDBObjectBuilder();
    group.push("$group");
    group.push("_id");
    group.add("size", "$sizes");
    group.add("color", "$colors");
    group.pop();//from  w  ww .j a v a 2s . co  m
    group.push("count");
    group.add("$sum", 1);
    group.pop();
    group.pop();

    return col.aggregate(unwindSizes, unwindColors, group.get()).results().iterator();
}

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From source file:com.github.nlloyd.hornofmongo.MongoScope.java

License:Open Source License

public static Object listFiles(Context cx, Scriptable thisObj, Object[] args, Function funObj) {
    File path = null;//w  w w  .  java2s  .c o  m
    if (args.length == 0)
        path = ((MongoScope) thisObj).getCwd();
    else if (args.length > 1)
        Context.throwAsScriptRuntimeEx(new MongoScriptException("need to specify 1 argument to listFiles"));
    else {
        try {
            path = resolveFilePath((MongoScope) thisObj, Context.toString(args[0]));
        } catch (IOException e) {
            Context.throwAsScriptRuntimeEx(new MongoScriptException("listFiles: " + e.getMessage()));
        }
    }

    // mongo only checks if the path exists, so we will do the same here
    if (!path.exists())
        Context.throwAsScriptRuntimeEx(
                new MongoScriptException("listFiles: no such directory: " + path.getAbsolutePath()));
    if (!path.isDirectory())
        Context.throwAsScriptRuntimeEx(
                new MongoScriptException("listFiles: not a directory: " + path.getAbsolutePath()));

    List<DBObject> files = new ArrayList<DBObject>();
    for (File file : path.listFiles()) {
        BasicDBObjectBuilder fileObj = new BasicDBObjectBuilder();
        fileObj.append("name", file.getPath()).append("isDirectory", file.isDirectory());
        if (!file.isDirectory())
            fileObj.append("size", file.length());
        files.add(fileObj.get());
    }

    Object jsResult = BSONizer.convertBSONtoJS((MongoScope) thisObj, files);

    return jsResult;
}

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From source file:com.github.sakserv.storm.bolt.SimpleMongoBolt.java

License:Apache License

@Override
public DBObject getDBObjectForInput(Tuple input) {
    BasicDBObjectBuilder dbObjectBuilder = new BasicDBObjectBuilder();

    for (String field : input.getFields()) {
        Object value = input.getValueByField(field);
        if (isValidDBObjectField(value)) {
            dbObjectBuilder.append(field, value);
        }/*  w w  w  .  j  ava  2s  . co  m*/
    }

    return dbObjectBuilder.get();
}

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