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support count api #84
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51 changes: 51 additions & 0 deletions
51
src/main/java/com/baidu/hugegraph/api/traverser/CountAPI.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| /* | ||
| * Copyright 2017 HugeGraph Authors | ||
| * | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with this | ||
| * work for additional information regarding copyright ownership. The ASF | ||
| * licenses this file to You under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the | ||
| * License for the specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
|
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| package com.baidu.hugegraph.api.traverser; | ||
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| import java.util.Map; | ||
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| import com.baidu.hugegraph.api.traverser.structure.CountRequest; | ||
| import com.baidu.hugegraph.client.RestClient; | ||
| import com.baidu.hugegraph.rest.RestResult; | ||
| import com.baidu.hugegraph.util.E; | ||
|
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| public class CountAPI extends TraversersAPI { | ||
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| private static final String COUNT = "count"; | ||
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| public CountAPI(RestClient client, String graph) { | ||
| super(client, graph); | ||
| } | ||
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| @Override | ||
| protected String type() { | ||
| return "count"; | ||
| } | ||
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| public long post(CountRequest request) { | ||
| this.client.checkApiVersion("0.55", "count"); | ||
| RestResult result = this.client.post(this.path(), request); | ||
| @SuppressWarnings("unchecked") | ||
| Map<String, Number> countMap = result.readObject(Map.class); | ||
| E.checkState(countMap.containsKey(COUNT), | ||
| "The result doesn't have key '%s'", COUNT); | ||
| return countMap.get(COUNT).longValue(); | ||
| } | ||
| } |
196 changes: 196 additions & 0 deletions
196
src/main/java/com/baidu/hugegraph/api/traverser/structure/CountRequest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,196 @@ | ||
| /* | ||
| * Copyright 2017 HugeGraph Authors | ||
| * | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with this | ||
| * work for additional information regarding copyright ownership. The ASF | ||
| * licenses this file to You under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the | ||
| * License for the specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
|
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| package com.baidu.hugegraph.api.traverser.structure; | ||
|
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| import java.util.ArrayList; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
|
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| import com.baidu.hugegraph.api.API; | ||
| import com.baidu.hugegraph.api.traverser.TraversersAPI; | ||
| import com.baidu.hugegraph.structure.constant.Direction; | ||
| import com.baidu.hugegraph.structure.constant.Traverser; | ||
| import com.baidu.hugegraph.util.E; | ||
| import com.fasterxml.jackson.annotation.JsonProperty; | ||
|
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| public class CountRequest { | ||
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| @JsonProperty("source") | ||
| private Object source; | ||
| @JsonProperty("steps") | ||
| private List<Step> steps; | ||
| @JsonProperty("contains_traversed") | ||
| public boolean containsTraversed; | ||
| @JsonProperty("dedup_size") | ||
| public long dedupSize; | ||
|
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| private CountRequest() { | ||
| this.source = null; | ||
| this.steps = new ArrayList<>(); | ||
| this.containsTraversed = false; | ||
| this.dedupSize = Traverser.DEFAULT_DEDUP_SIZE; | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return String.format("CountRequest{source=%s,steps=%s," + | ||
| "containsTraversed=%s,dedupSize=%s", | ||
| this.source, this.steps, this.containsTraversed, | ||
| this.dedupSize); | ||
| } | ||
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| public static class Builder { | ||
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| private CountRequest request; | ||
| private List<Step.Builder> stepBuilders; | ||
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| public Builder() { | ||
| this.request = new CountRequest(); | ||
| this.stepBuilders = new ArrayList<>(); | ||
| } | ||
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| public Builder source(Object source) { | ||
| E.checkArgumentNotNull(source, "The source can't be null"); | ||
| this.request.source = source; | ||
| return this; | ||
| } | ||
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| public Step.Builder steps() { | ||
| Step.Builder builder = new Step.Builder(); | ||
| this.stepBuilders.add(builder); | ||
| return builder; | ||
| } | ||
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| public Builder containsTraversed(boolean containsTraversed) { | ||
| this.request.containsTraversed = containsTraversed; | ||
| return this; | ||
| } | ||
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| public Builder dedupSize(long dedupSize) { | ||
| checkDedupSize(dedupSize); | ||
| this.request.dedupSize = dedupSize; | ||
| return this; | ||
| } | ||
|
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| public CountRequest build() { | ||
| E.checkArgumentNotNull(this.request.source, | ||
| "The source can't be null"); | ||
| for (Step.Builder builder : this.stepBuilders) { | ||
| this.request.steps.add(builder.build()); | ||
| } | ||
| E.checkArgument(this.request.steps != null && | ||
| !this.request.steps.isEmpty(), | ||
| "The steps can't be null or empty"); | ||
| checkDedupSize(this.request.dedupSize); | ||
| return this.request; | ||
| } | ||
| } | ||
|
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| private static void checkDedupSize(long dedupSize) { | ||
| E.checkArgument(dedupSize >= 0L || dedupSize == API.NO_LIMIT, | ||
| "The dedup size must be >= 0 or == %s, but got: %s", | ||
| API.NO_LIMIT, dedupSize); | ||
| } | ||
|
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| public static class Step { | ||
|
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| @JsonProperty("direction") | ||
| private String direction; | ||
| @JsonProperty("labels") | ||
| private List<String> labels; | ||
| @JsonProperty("properties") | ||
| private Map<String, Object> properties; | ||
| @JsonProperty("degree") | ||
| private long degree; | ||
| @JsonProperty("skip_degree") | ||
| private long skipDegree; | ||
|
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| private Step() { | ||
| this.direction = "BOTH"; | ||
| this.labels = new ArrayList<>(); | ||
| this.properties = new HashMap<>(); | ||
| this.degree = Traverser.DEFAULT_DEGREE; | ||
| this.skipDegree = Traverser.DEFAULT_SKIP_DEGREE; | ||
| } | ||
|
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| @Override | ||
| public String toString() { | ||
| return String.format("Step{direction=%s,labels=%s,properties=%s," + | ||
| "degree=%s,skipDegree=%s}", | ||
| this.direction, this.labels, this.properties, | ||
| this.degree, this.skipDegree); | ||
| } | ||
|
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| public static class Builder { | ||
|
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| private Step step; | ||
|
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| private Builder() { | ||
| this.step = new Step(); | ||
| } | ||
|
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| public Builder direction(Direction direction) { | ||
| this.step.direction = direction.toString(); | ||
| return this; | ||
| } | ||
|
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| public Builder labels(List<String> labels) { | ||
| this.step.labels = labels; | ||
| return this; | ||
| } | ||
|
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| public Builder labels(String label) { | ||
| this.step.labels.add(label); | ||
| return this; | ||
| } | ||
|
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| public Builder properties(Map<String, Object> properties) { | ||
| this.step.properties = properties; | ||
| return this; | ||
| } | ||
|
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| public Builder properties(String key, Object value) { | ||
| this.step.properties.put(key, value); | ||
| return this; | ||
| } | ||
|
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| public Builder degree(long degree) { | ||
| TraversersAPI.checkDegree(degree); | ||
| this.step.degree = degree; | ||
| return this; | ||
| } | ||
|
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| public Builder skipDegree(long skipDegree) { | ||
| TraversersAPI.checkSkipDegree(skipDegree, this.step.degree, | ||
| API.NO_LIMIT); | ||
| this.step.skipDegree = skipDegree; | ||
| return this; | ||
| } | ||
|
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| private Step build() { | ||
| TraversersAPI.checkDegree(this.step.degree); | ||
| TraversersAPI.checkSkipDegree(this.step.skipDegree, | ||
| this.step.degree, API.NO_LIMIT); | ||
| return this.step; | ||
| } | ||
| } | ||
| } | ||
| } |
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count()