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[closes #612] Signed-off-by: Mark Paluch <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /* | ||
| * Copyright 2023 the original author or authors. | ||
| * | ||
| * Licensed 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 | ||
| * | ||
| * https://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. | ||
| */ | ||
|
|
||
| package io.r2dbc.postgresql.codec; | ||
|
|
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| import io.r2dbc.postgresql.util.Assert; | ||
|
|
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| import java.util.Arrays; | ||
| import java.util.Collection; | ||
|
|
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| /** | ||
| * Value object that maps to the {@code vector} datatype provided by Postgres pgvector. | ||
| * | ||
| * @since 1.0.3 | ||
| */ | ||
| public class Vector { | ||
|
|
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| private static final Vector EMPTY = new Vector(new float[0]); | ||
|
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| private final float[] vec; | ||
|
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| private Vector(float[] vec) { | ||
| this.vec = Assert.requireNonNull(vec, "Vector must not be null"); | ||
| } | ||
|
|
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| /** | ||
| * Create a new empty {@link Vector}. | ||
| * | ||
| * @return the empty {@link Vector} object | ||
| */ | ||
| public static Vector empty() { | ||
| return EMPTY; | ||
| } | ||
|
|
||
| /** | ||
| * Create a new {@link Vector} given {@code vector} points. | ||
| * | ||
| * @param vec the vector values | ||
| * @return the new {@link Vector} object | ||
| */ | ||
| public static Vector of(float... vec) { | ||
| Assert.requireNonNull(vec, "Vector must not be null"); | ||
| return vec.length == 0 ? empty() : new Vector(vec); | ||
| } | ||
|
|
||
| /** | ||
| * Create a new {@link Vector} given {@code vector} points. | ||
| * | ||
| * @param vec the vector values | ||
| * @return the new {@link Vector} object | ||
| */ | ||
| public static Vector of(Collection<? extends Number> vec) { | ||
| Assert.requireNonNull(vec, "Vector must not be null"); | ||
|
|
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| if (vec.isEmpty()) { | ||
| return empty(); | ||
| } | ||
|
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| float[] floats = new float[vec.size()]; | ||
| int index = 0; | ||
| for (Number number : vec) { | ||
| Number next = Assert.requireNonNull(number, "Vector must not contain null elements"); | ||
| floats[index++] = next.floatValue(); | ||
| } | ||
|
|
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| return new Vector(floats); | ||
| } | ||
|
|
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| /** | ||
| * Return the vector values. | ||
| * | ||
| * @return the vector values. | ||
| */ | ||
| public float[] getVector() { | ||
| if (this.vec.length == 0) { | ||
| return this.vec; | ||
| } | ||
| float[] copy = new float[this.vec.length]; | ||
| System.arraycopy(this.vec, 0, copy, 0, this.vec.length); | ||
| return copy; | ||
| } | ||
|
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||
| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| Vector other = (Vector) o; | ||
| return Arrays.equals(this.vec, other.vec); | ||
| } | ||
|
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| @Override | ||
| public int hashCode() { | ||
| return Arrays.hashCode(this.vec); | ||
| } | ||
|
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| @Override | ||
| public String toString() { | ||
| StringBuilder builder = new StringBuilder(); | ||
| builder.append('['); | ||
|
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| for (int i = 0; i < this.vec.length; i++) { | ||
| if (i != 0) { | ||
| builder.append(','); | ||
| } | ||
| builder.append(this.vec[i]); | ||
| } | ||
| builder.append(']'); | ||
|
|
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| return builder.toString(); | ||
| } | ||
| } |
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