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Add snippet for Collection Group Query #1399

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Merged
kurtisvg merged 1 commit into from
May 2, 2019
Merged

Add snippet for Collection Group Query #1399

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2 changes: 1 addition & 1 deletion firestore/pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,7 @@
<dependency>
<groupId>com.google.cloud</groupId>
<artifactId>google-cloud-firestore</artifactId>
<version>0.81.0-beta</version>
<version>1.2.0</version>
</dependency>
<!-- [END fs-maven] -->

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68 changes: 63 additions & 5 deletions firestore/src/main/java/com/example/firestore/snippets/QueryDataSnippets.java
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Expand Up @@ -17,23 +17,19 @@
package com.example.firestore.snippets;

import com.example.firestore.snippets.model.City;

import com.google.api.core.ApiFuture;
import com.google.api.core.ApiFutures;
import com.google.cloud.firestore.CollectionReference;
import com.google.cloud.firestore.DocumentReference;
import com.google.cloud.firestore.DocumentSnapshot;
import com.google.cloud.firestore.Firestore;
import com.google.cloud.firestore.Query;
import com.google.cloud.firestore.Query.Direction;
import com.google.cloud.firestore.QueryDocumentSnapshot;
import com.google.cloud.firestore.QuerySnapshot;
import com.google.cloud.firestore.WriteResult;

import com.google.firestore.v1beta1.Document;
import com.google.protobuf.Api;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
Expand Down Expand Up @@ -383,4 +379,66 @@ List<Query> paginateCursor() throws InterruptedException, ExecutionException, Ti
// [END fs_paginate_cursor]
return Arrays.asList(firstPage, secondPage);
}

void collectionGroupQuery() throws ExecutionException, InterruptedException {
//CHECKSTYLE OFF: Indentation
//CHECKSTYLE OFF: RightCurlyAlone
// [START fs_collection_group_query_data_setup]
CollectionReference cities = db.collection("cities");

final List<ApiFuture<WriteResult>> futures = Arrays.asList(
cities.document("SF").collection("landmarks").document().set(new HashMap<String, String>() {{
put("name", "Golden Gate Bridge");
put("type", "bridge");
}}),
cities.document("SF").collection("landmarks").document().set(new HashMap<String, String>() {{
put("name", "Legion of Honor");
put("type", "museum");
}}),
cities.document("LA").collection("landmarks").document().set(new HashMap<String, String>() {{
put("name", "Griffith Park");
put("type", "park");
}}),
cities.document("LA").collection("landmarks").document().set(new HashMap<String, String>() {{
put("name", "The Getty");
put("type", "museum");
}}),
cities.document("DC").collection("landmarks").document().set(new HashMap<String, String>() {{
put("name", "Lincoln Memorial");
put("type", "memorial");
}}),
cities.document("DC").collection("landmarks").document().set(new HashMap<String, String>() {{
put("name", "National Air and Space Museum");
put("type", "museum");
}}),
cities.document("TOK").collection("landmarks").document().set(new HashMap<String, String>() {{
put("name", "Ueno Park");
put("type", "park");
}}),
cities.document("TOK").collection("landmarks").document().set(new HashMap<String, String>() {{
put("name", "National Museum of Nature and Science");
put("type", "museum");
}}),
cities.document("BJ").collection("landmarks").document().set(new HashMap<String, String>() {{
put("name", "Jingshan Park");
put("type", "park");
}}),
cities.document("BJ").collection("landmarks").document().set(new HashMap<String, String>() {{
put("name", "Beijing Ancient Observatory");
put("type", "museum");
}})
);
final List<WriteResult> landmarks = ApiFutures.allAsList(futures).get();
// [END fs_collection_group_query_data_setup]

// [START fs_collection_group_query]
final Query museums = db.collectionGroup("landmarks").whereEqualTo("type", "museum");
final ApiFuture<QuerySnapshot> querySnapshot = museums.get();
for (DocumentSnapshot document : querySnapshot.get().getDocuments()) {
System.out.println(document.getId());
}
// [END fs_collection_group_query]
//CHECKSTYLE ON: RightCurlyAlone
//CHECKSTYLE ON: Indentation
}
}
5 changes: 5 additions & 0 deletions firestore/src/main/java/com/example/firestore/snippets/model/City.java
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Expand Up @@ -161,4 +161,9 @@ public boolean equals(Object obj) {
&& Objects.equals(capital, city.capital)
&& Objects.equals(regions, city.regions);
}

@Override
public int hashCode() {
return Objects.hash(name, state, country, capital, population, regions);
}
}