org.jooq.JSON Maven / Gradle / Ivy
/*
* 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
*
* 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.
*
* Other licenses:
* -----------------------------------------------------------------------------
* Commercial licenses for this work are available. These replace the above
* Apache-2.0 license and offer limited warranties, support, maintenance, and
* commercial database integrations.
*
* For more information, please visit: http://www.jooq.org/licenses
*
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*/
package org.jooq;
import java.io.Serializable;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
/**
* A JSON wrapper type for JSON data obtained from the database.
*
* The wrapper represents JSON {@link #data()} in serialised string form. A
* CAST(NULL AS JSON) value is represented by a null
* reference of type {@link JSON}, not as data() == null. This is
* consistent with jOOQ's general way of returning NULL from
* {@link Result} and {@link Record} methods.
*
* Unlike the normalising {@link JSONB} data type, the {@link JSON} type uses a
* purely text based, formatting-preserving representation of the JSON content,
* meaning that e.g. the following two documents are not equal, due to
* their different object attribute order and formatting:
*
*
* {"a":1,"b":2}{"b": 2, "a": 1}
*
* This impacts the behaviour of
*
* - {@link #equals(Object)}
* - {@link #hashCode()}
* - {@link #toString()}
*
*/
public final class JSON implements Serializable {
private final String data;
private JSON(String data) {
this.data = String.valueOf(data);
}
@NotNull
public final String data() {
return data;
}
/**
* Create a new {@link JSON} instance from string data input.
*/
@NotNull
public static final JSON valueOf(String data) {
return new JSON(data);
}
/**
* Create a new {@link JSON} instance from string data input.
*
* This is the same as {@link #valueOf(String)}, but it can be static
* imported.
*/
@NotNull
public static final JSON json(String data) {
return new JSON(data);
}
/**
* Create a new {@link JSON} instance from string data input, or
* null if the input is null.
*/
@Nullable
public static final JSON jsonOrNull(String data) {
return data == null ? null : json(data);
}
/**
* {@inheritDoc}
*
*
{@link JSON} specifics:
*
* The {@link JSON} type uses a text-based, formatting-preserving
* representation of the JSON content, meaning that two equivalent JSON
* documents are considered not equal if their formatting or object
* attribute ordering differs (see {@link JSON} for details).
*/
@Override
public int hashCode() {
return data.hashCode();
}
/**
* {@inheritDoc}
*
*
{@link JSON} specifics:
*
* The {@link JSON} type uses a text-based, formatting-preserving
* representation of the JSON content, meaning that two equivalent JSON
* documents are considered not equal if their formatting or object
* attribute ordering differs (see {@link JSON} for details).
*/
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj instanceof JSON j)
return data.equals(j.data);
return false;
}
/**
* {@inheritDoc}
*
*
{@link JSON} specifics:
*
* The {@link JSON} type uses a text-based, formatting-preserving
* representation of the JSON content, meaning that two equivalent JSON
* documents are considered not equal if their formatting or object
* attribute ordering differs (see {@link JSON} for details).
*/
@Override
public String toString() {
return String.valueOf(data);
}
}