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Merge pull request #429 from hampelratte/parameterbinding
Parameter binding in InfluxQL (#274)
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101 changes: 101 additions & 0 deletions
101
src/main/java/org/influxdb/dto/BoundParameterQuery.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| package org.influxdb.dto; | ||
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| import com.squareup.moshi.JsonWriter; | ||
| import java.io.IOException; | ||
| import java.nio.charset.Charset; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.Map.Entry; | ||
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| import org.influxdb.InfluxDBIOException; | ||
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| import okio.Buffer; | ||
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| public final class BoundParameterQuery extends Query { | ||
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| private final Map<String, Object> params = new HashMap<>(); | ||
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| private BoundParameterQuery(final String command, final String database) { | ||
| super(command, database, true); | ||
| } | ||
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| public String getParameterJsonWithUrlEncoded() { | ||
| try { | ||
| String jsonParameterObject = createJsonObject(params); | ||
| String urlEncodedJsonParameterObject = encode(jsonParameterObject); | ||
| return urlEncodedJsonParameterObject; | ||
| } catch (IOException e) { | ||
| throw new InfluxDBIOException(e); | ||
| } | ||
| } | ||
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| private String createJsonObject(final Map<String, Object> parameterMap) throws IOException { | ||
| Buffer b = new Buffer(); | ||
| JsonWriter writer = JsonWriter.of(b); | ||
| writer.beginObject(); | ||
| for (Entry<String, Object> pair : parameterMap.entrySet()) { | ||
| String name = pair.getKey(); | ||
| Object value = pair.getValue(); | ||
| if (value instanceof Number) { | ||
| Number number = (Number) value; | ||
| writer.name(name).value(number); | ||
| } else if (value instanceof String) { | ||
| writer.name(name).value((String) value); | ||
| } else if (value instanceof Boolean) { | ||
| writer.name(name).value((Boolean) value); | ||
| } else { | ||
| writer.name(name).value(String.valueOf(value)); | ||
| } | ||
| } | ||
| writer.endObject(); | ||
| return b.readString(Charset.forName("utf-8")); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| final int prime = 31; | ||
| int result = super.hashCode(); | ||
| result = prime * result + params.hashCode(); | ||
| return result; | ||
| } | ||
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| @Override | ||
| public boolean equals(final Object obj) { | ||
| if (this == obj) { | ||
| return true; | ||
| } | ||
| if (!super.equals(obj)) { | ||
| return false; | ||
| } | ||
| BoundParameterQuery other = (BoundParameterQuery) obj; | ||
| if (!params.equals(other.params)) { | ||
| return false; | ||
| } | ||
| return true; | ||
| } | ||
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| public static class QueryBuilder { | ||
| private BoundParameterQuery query; | ||
| private String influxQL; | ||
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| public static QueryBuilder newQuery(final String influxQL) { | ||
| QueryBuilder instance = new QueryBuilder(); | ||
| instance.influxQL = influxQL; | ||
| return instance; | ||
| } | ||
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| public QueryBuilder forDatabase(final String database) { | ||
| query = new BoundParameterQuery(influxQL, database); | ||
| return this; | ||
| } | ||
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| public QueryBuilder bind(final String placeholder, final Object value) { | ||
| query.params.put(placeholder, value); | ||
| return this; | ||
| } | ||
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| public BoundParameterQuery create() { | ||
| return query; | ||
| } | ||
| } | ||
| } |
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