001/*
002 * (C) Copyright 2018 Nuxeo (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Florent Guillaume
018 */
019package org.nuxeo.ecm.directory.memory;
020
021import static java.lang.Boolean.TRUE;
022
023import java.util.List;
024import java.util.Map;
025
026import org.nuxeo.ecm.core.query.QueryParseException;
027import org.nuxeo.ecm.core.query.sql.NXQL;
028import org.nuxeo.ecm.core.query.sql.model.Expression;
029import org.nuxeo.ecm.core.query.sql.model.Operand;
030import org.nuxeo.ecm.core.query.sql.model.Operator;
031import org.nuxeo.ecm.core.query.sql.model.Reference;
032import org.nuxeo.ecm.core.storage.ExpressionEvaluator;
033
034/**
035 * Evaluates an expression on a map.
036 *
037 * @since 10.3
038 */
039public class MapExpressionEvaluator extends ExpressionEvaluator {
040
041    protected static final Long ZERO = Long.valueOf(0);
042
043    protected static final Long ONE = Long.valueOf(1);
044
045    protected Map<String, Object> map;
046
047    public MapExpressionEvaluator() {
048        super(null, null, true);
049    }
050
051    public boolean matchesEntry(Expression expression, Map<String, Object> map) {
052        this.map = map;
053        Object result = walkExpression(expression);
054        return TRUE.equals(result);
055    }
056
057    protected QueryParseException unknownProperty(String name) {
058        return new QueryParseException("No column: " + name);
059    }
060
061    @Override
062    public Boolean walkMixinTypes(List<String> mixins, boolean include) {
063        throw unknownProperty(NXQL.ECM_MIXINTYPE);
064    }
065
066    @Override
067    protected Boolean walkEcmFulltext(String name, Operator op, Operand rvalue) {
068        throw unknownProperty(NXQL.ECM_FULLTEXT);
069    }
070
071    @Override
072    protected Boolean walkEcmPath(Operator op, Operand rvalue) {
073        throw unknownProperty(NXQL.ECM_PATH);
074    }
075
076    @Override
077    public Boolean walkStartsWith(Operand lvalue, Operand rvalue) {
078        throw new QueryParseException("Cannot use operator: " + Operator.STARTSWITH);
079    }
080
081    @Override
082    protected Boolean walkAncestorId(Operator op, Operand rvalue) {
083        throw unknownProperty(NXQL.ECM_ANCESTORID);
084    }
085
086    @Override
087    protected Boolean walkIsTrashed(Operator op, Operand rvalue) {
088        throw unknownProperty(NXQL.ECM_ISTRASHED);
089    }
090
091    @Override
092    public Object walkReference(Reference ref) {
093        if (ref.cast != null) {
094            throw new QueryParseException("Cannot use cast: " + ref);
095        }
096        Object value = map.get(ref.name);
097        if (value instanceof Boolean) {
098            value = (((Boolean) value).booleanValue() ? ONE : ZERO);
099        }
100        return value;
101    }
102
103}