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184
...stence-common/src/main/java/org/apache/syncope/core/persistence/common/dao/AnyFinder.java
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| @@ -0,0 +1,184 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
| package org.apache.syncope.core.persistence.common.dao; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.Comparator; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Optional; | ||
| import java.util.Set; | ||
| import java.util.regex.Pattern; | ||
| import org.apache.commons.jexl3.parser.Parser; | ||
| import org.apache.commons.jexl3.parser.ParserConstants; | ||
| import org.apache.commons.jexl3.parser.Token; | ||
| import org.apache.commons.lang3.StringUtils; | ||
| import org.apache.syncope.common.lib.types.AnyTypeKind; | ||
| import org.apache.syncope.core.persistence.api.dao.AnySearchDAO; | ||
| import org.apache.syncope.core.persistence.api.dao.PlainSchemaDAO; | ||
| import org.apache.syncope.core.persistence.api.dao.search.AttrCond; | ||
| import org.apache.syncope.core.persistence.api.dao.search.SearchCond; | ||
| import org.apache.syncope.core.persistence.api.entity.Any; | ||
| import org.apache.syncope.core.persistence.api.entity.DerSchema; | ||
| import org.apache.syncope.core.persistence.api.entity.PlainAttrUniqueValue; | ||
| import org.apache.syncope.core.persistence.api.entity.PlainSchema; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
| import org.springframework.transaction.annotation.Transactional; | ||
|
|
||
| public class AnyFinder { | ||
|
|
||
| protected static final Logger LOG = LoggerFactory.getLogger(AnyFinder.class); | ||
|
|
||
| protected static final Comparator<String> LITERAL_COMPARATOR = (l1, l2) -> { | ||
| if (l1 == null && l2 == null) { | ||
| return 0; | ||
| } else if (l1 != null && l2 == null) { | ||
| return -1; | ||
| } else if (l1 == null) { | ||
| return 1; | ||
| } else if (l1.length() == l2.length()) { | ||
| return 0; | ||
| } else if (l1.length() > l2.length()) { | ||
| return -1; | ||
| } else { | ||
| return 1; | ||
| } | ||
| }; | ||
|
|
||
| /** | ||
| * Split an attribute value recurring on provided literals/tokens. | ||
| * | ||
| * @param attrValue value to be split | ||
| * @param literals literals/tokens | ||
| * @return split value | ||
| */ | ||
| protected static List<String> split(final String attrValue, final List<String> literals) { | ||
| final List<String> attrValues = new ArrayList<>(); | ||
|
|
||
| if (literals.isEmpty()) { | ||
| attrValues.add(attrValue); | ||
| } else { | ||
| for (String token : attrValue.split(Pattern.quote(literals.get(0)))) { | ||
| if (!token.isEmpty()) { | ||
| attrValues.addAll(split(token, literals.subList(1, literals.size()))); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return attrValues; | ||
| } | ||
|
|
||
| protected final PlainSchemaDAO plainSchemaDAO; | ||
|
|
||
| protected final AnySearchDAO anySearchDAO; | ||
|
|
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| public AnyFinder(final PlainSchemaDAO plainSchemaDAO, final AnySearchDAO anySearchDAO) { | ||
| this.plainSchemaDAO = plainSchemaDAO; | ||
| this.anySearchDAO = anySearchDAO; | ||
| } | ||
|
|
||
| @Transactional(readOnly = true) | ||
| public <A extends Any<?>> Optional<A> findByPlainAttrUniqueValue( | ||
| final AnyTypeKind anyTypeKind, | ||
| final PlainSchema schema, | ||
| final PlainAttrUniqueValue attrUniqueValue) { | ||
|
|
||
| AttrCond cond = new AttrCond(AttrCond.Type.EQ); | ||
| cond.setSchema(schema.getKey()); | ||
| cond.setExpression(attrUniqueValue.getStringValue()); | ||
|
|
||
| List<A> result = anySearchDAO.search(SearchCond.of(cond), anyTypeKind); | ||
| if (result.isEmpty()) { | ||
| return Optional.empty(); | ||
| } | ||
| return Optional.of(result.get(0)); | ||
| } | ||
|
|
||
| @Transactional(readOnly = true) | ||
| public <A extends Any<?>> List<A> findByDerAttrValue( | ||
| final AnyTypeKind anyTypeKind, | ||
| final DerSchema derSchema, | ||
| final String value, | ||
| final boolean ignoreCaseMatch) { | ||
|
|
||
| if (derSchema == null) { | ||
| LOG.error("No DerSchema"); | ||
| return List.of(); | ||
| } | ||
|
|
||
| Parser parser = new Parser(derSchema.getExpression()); | ||
|
|
||
| // Schema keys | ||
| List<String> identifiers = new ArrayList<>(); | ||
|
|
||
| // Literals | ||
| List<String> literals = new ArrayList<>(); | ||
|
|
||
| // Get schema keys and literals | ||
| for (Token token = parser.getNextToken(); token != null && StringUtils.isNotBlank(token.toString()); | ||
| token = parser.getNextToken()) { | ||
|
|
||
| if (token.kind == ParserConstants.STRING_LITERAL) { | ||
| literals.add(token.toString().substring(1, token.toString().length() - 1)); | ||
| } | ||
|
|
||
| if (token.kind == ParserConstants.IDENTIFIER) { | ||
| identifiers.add(token.toString()); | ||
| } | ||
| } | ||
|
|
||
| // Sort literals in order to process later literals included into others | ||
| literals.sort(LITERAL_COMPARATOR); | ||
|
|
||
| // Split value on provided literals | ||
| List<String> attrValues = split(value, literals); | ||
|
|
||
| if (attrValues.size() != identifiers.size()) { | ||
| LOG.error("Ambiguous JEXL expression resolution: literals and values have different size"); | ||
| return List.of(); | ||
| } | ||
|
|
||
| List<SearchCond> andConditions = new ArrayList<>(); | ||
|
|
||
| // Contains used identifiers in order to avoid replications | ||
| Set<String> used = new HashSet<>(); | ||
|
|
||
| // Create several clauses: one for eanch identifiers | ||
| for (int i = 0; i < identifiers.size() && !used.contains(identifiers.get(i)); i++) { | ||
| // verify schema existence and get schema type | ||
| PlainSchema schema = plainSchemaDAO.findById(identifiers.get(i)).orElse(null); | ||
|
|
||
| if (schema == null) { | ||
| LOG.error("Invalid schema '{}', ignoring", identifiers.get(i)); | ||
| } else { | ||
| used.add(identifiers.get(i)); | ||
|
|
||
| AttrCond cond = new AttrCond(ignoreCaseMatch ? AttrCond.Type.IEQ : AttrCond.Type.EQ); | ||
| cond.setSchema(schema.getKey()); | ||
| cond.setExpression(attrValues.get(i)); | ||
| andConditions.add(SearchCond.of(cond)); | ||
| } | ||
| } | ||
|
|
||
| LOG.debug("Generated search {} conditions: {}", anyTypeKind, andConditions); | ||
|
|
||
| return anySearchDAO.search(SearchCond.and(andConditions), anyTypeKind); | ||
| } | ||
| } |
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