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Refine API to create and render CQL object specifications.
We now expose specification entrypoints at SpecificationBuilder and a generic generator at CqlGenerator.toCql(…). Closes #1506
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93 changes: 93 additions & 0 deletions
93
...dra/src/main/java/org/springframework/data/cassandra/core/cql/generator/CqlGenerator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| /* | ||
| * Copyright 2024 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 org.springframework.data.cassandra.core.cql.generator; | ||
|
|
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| import org.springframework.data.cassandra.core.cql.keyspace.*; | ||
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| /** | ||
| * Entrypoint for CQL generation of {@link CqlSpecification} objects representing DML statements such as table creations | ||
| * or keyspace drops. For example: | ||
| * | ||
| * <pre class="code"> | ||
| * DropUserTypeSpecification spec = SpecificationBuilder.dropType("address"); | ||
| * String cql = CqlGenerator.toCql(spec); | ||
| * </pre> | ||
| * | ||
| * @author Mark Paluch | ||
| * @since 4.4 | ||
| * @see SpecificationBuilder | ||
| */ | ||
| public final class CqlGenerator { | ||
|
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| private CqlGenerator() { | ||
| // utility class, no instances | ||
| } | ||
|
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| /** | ||
| * Entrypoint for CQL generation of {@link CqlSpecification} objects. | ||
| * | ||
| * @param specification the CQL specification to generate CQL for. | ||
| * @return the generated CQL from {@link CqlSpecification}. | ||
| */ | ||
| public static String toCql(CqlSpecification specification) { | ||
|
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| if (specification instanceof CreateKeyspaceSpecification createKeyspace) { | ||
| return CreateKeyspaceCqlGenerator.toCql(createKeyspace); | ||
| } | ||
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| if (specification instanceof AlterKeyspaceSpecification alterKeyspace) { | ||
| return AlterKeyspaceCqlGenerator.toCql(alterKeyspace); | ||
| } | ||
|
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| if (specification instanceof DropKeyspaceSpecification dropKeyspace) { | ||
| return DropKeyspaceCqlGenerator.toCql(dropKeyspace); | ||
| } | ||
|
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| if (specification instanceof CreateTableSpecification createTable) { | ||
| return CreateTableCqlGenerator.toCql(createTable); | ||
| } | ||
|
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| if (specification instanceof AlterTableSpecification alterTable) { | ||
| return AlterTableCqlGenerator.toCql(alterTable); | ||
| } | ||
|
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| if (specification instanceof DropTableSpecification dropTable) { | ||
| return DropTableCqlGenerator.toCql(dropTable); | ||
| } | ||
|
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| if (specification instanceof CreateUserTypeSpecification createType) { | ||
| return CreateUserTypeCqlGenerator.toCql(createType); | ||
| } | ||
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| if (specification instanceof AlterUserTypeSpecification alterType) { | ||
| return AlterUserTypeCqlGenerator.toCql(alterType); | ||
| } | ||
|
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| if (specification instanceof DropUserTypeSpecification dropType) { | ||
| return DropUserTypeCqlGenerator.toCql(dropType); | ||
| } | ||
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| if (specification instanceof CreateIndexSpecification createIndex) { | ||
| return CreateIndexCqlGenerator.toCql(createIndex); | ||
| } | ||
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| if (specification instanceof DropIndexSpecification dropIndex) { | ||
| return DropIndexCqlGenerator.toCql(dropIndex); | ||
| } | ||
|
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| throw new UnsupportedOperationException(String.format("CQL specification %s is not supported", specification)); | ||
| } | ||
| } |
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24 changes: 24 additions & 0 deletions
24
.../src/main/java/org/springframework/data/cassandra/core/cql/keyspace/CqlSpecification.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| /* | ||
| * Copyright 2024 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 org.springframework.data.cassandra.core.cql.keyspace; | ||
|
|
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| /** | ||
| * Marker interface for CQL specification objects that describe CQL keyspace objects. | ||
| * | ||
| * @author Mark Paluch | ||
| * @since 4.4 | ||
| */ | ||
| public interface CqlSpecification {} |
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