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Add EncryptProjectionRewriteSupportedChecker
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.../rewrite/token/generator/projection/checker/EncryptProjectionRewriteSupportedChecker.java
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| /* | ||
| * 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 org.apache.shardingsphere.encrypt.rewrite.token.generator.projection.checker; | ||
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| import lombok.AccessLevel; | ||
| import lombok.NoArgsConstructor; | ||
| import org.apache.shardingsphere.encrypt.rule.EncryptRule; | ||
| import org.apache.shardingsphere.encrypt.spi.EncryptAlgorithm; | ||
| import org.apache.shardingsphere.infra.annotation.HighFrequencyInvocation; | ||
| import org.apache.shardingsphere.infra.binder.context.segment.select.projection.Projection; | ||
| import org.apache.shardingsphere.infra.binder.context.segment.select.projection.impl.ColumnProjection; | ||
| import org.apache.shardingsphere.infra.binder.context.statement.dml.SelectStatementContext; | ||
| import org.apache.shardingsphere.infra.exception.core.ShardingSpherePreconditions; | ||
| import org.apache.shardingsphere.infra.exception.generic.UnsupportedSQLOperationException; | ||
| import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.combine.CombineSegment; | ||
| import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.item.ProjectionSegment; | ||
| import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.item.ShorthandProjectionSegment; | ||
| import org.apache.shardingsphere.sql.parser.statement.core.segment.generic.bound.ColumnSegmentBoundInfo; | ||
| import org.apache.shardingsphere.sql.parser.statement.core.value.identifier.IdentifierValue; | ||
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| import java.util.List; | ||
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| /** | ||
| * Projection token generator rewrite supported checker. | ||
| */ | ||
| @HighFrequencyInvocation | ||
| @NoArgsConstructor(access = AccessLevel.PRIVATE) | ||
| public final class EncryptProjectionRewriteSupportedChecker { | ||
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| /** | ||
| * Check not contain encrypt projection in combine segment. | ||
| * | ||
| * @param encryptRule encrypt rule | ||
| * @param selectStatementContext select statement context | ||
| */ | ||
| public static void checkNotContainEncryptProjectionInCombineSegment(final EncryptRule encryptRule, final SelectStatementContext selectStatementContext) { | ||
| ShardingSpherePreconditions.checkState(!containsEncryptProjectionInCombineSegment(encryptRule, selectStatementContext), | ||
| () -> new UnsupportedSQLOperationException("Can not support encrypt projection in combine statement.")); | ||
| } | ||
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| private static boolean containsEncryptProjectionInCombineSegment(final EncryptRule encryptRule, final SelectStatementContext selectStatementContext) { | ||
| if (!selectStatementContext.getSqlStatement().getCombine().isPresent()) { | ||
| return false; | ||
| } | ||
| CombineSegment combineSegment = selectStatementContext.getSqlStatement().getCombine().get(); | ||
| List<Projection> leftProjections = selectStatementContext.getSubqueryContexts().get(combineSegment.getLeft().getStartIndex()).getProjectionsContext().getExpandProjections(); | ||
| List<Projection> rightProjections = selectStatementContext.getSubqueryContexts().get(combineSegment.getRight().getStartIndex()).getProjectionsContext().getExpandProjections(); | ||
| ShardingSpherePreconditions.checkState(leftProjections.size() == rightProjections.size(), () -> new UnsupportedSQLOperationException("Column projections must be same for combine statement")); | ||
| for (int i = 0; i < leftProjections.size(); i++) { | ||
| if (containsEncryptProjectionInCombineSegment(encryptRule, leftProjections.get(i), rightProjections.get(i))) { | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
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| private static boolean containsEncryptProjectionInCombineSegment(final EncryptRule encryptRule, final Projection leftProjection, final Projection rightProjection) { | ||
| ColumnSegmentBoundInfo leftColumnInfo = getColumnSegmentBoundInfo(leftProjection); | ||
| EncryptAlgorithm leftColumnEncryptor = encryptRule.findQueryEncryptor(leftColumnInfo.getOriginalTable().getValue(), leftColumnInfo.getOriginalColumn().getValue()).orElse(null); | ||
| ColumnSegmentBoundInfo rightColumnInfo = getColumnSegmentBoundInfo(rightProjection); | ||
| EncryptAlgorithm rightColumnEncryptor = encryptRule.findQueryEncryptor(rightColumnInfo.getOriginalTable().getValue(), rightColumnInfo.getOriginalColumn().getValue()).orElse(null); | ||
| return null != leftColumnEncryptor || null != rightColumnEncryptor; | ||
| } | ||
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| private static ColumnSegmentBoundInfo getColumnSegmentBoundInfo(final Projection projection) { | ||
| return projection instanceof ColumnProjection | ||
| ? new ColumnSegmentBoundInfo(null, null, ((ColumnProjection) projection).getOriginalTable(), ((ColumnProjection) projection).getOriginalColumn()) | ||
| : new ColumnSegmentBoundInfo(new IdentifierValue(projection.getColumnLabel())); | ||
| } | ||
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| /** | ||
| * Check not contain encrypt shorthand expand with subquery statement. | ||
| * | ||
| * @param selectStatementContext select statement context | ||
| * @param projectionSegment projection segment | ||
| */ | ||
| public static void checkNotContainEncryptShorthandExpandWithSubqueryStatement(final SelectStatementContext selectStatementContext, final ProjectionSegment projectionSegment) { | ||
| ShardingSpherePreconditions.checkState(!(projectionSegment instanceof ShorthandProjectionSegment) || !selectStatementContext.containsTableSubquery(), | ||
| () -> new UnsupportedSQLOperationException("Can not support encrypt shorthand expand with subquery statement.")); | ||
| } | ||
| } |