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Package: AbstractComparisonExpression

AbstractComparisonExpression

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AbstractComparisonExpression(AbstractExpression, AbstractExpression, CriteriaBuilder)
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setExpressionToQuery(StringBuilder, CriteriaParameterFiller)
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1: /**
2: * Copyright (C) 2022 Czech Technical University in Prague
3: *
4: * This program is free software: you can redistribute it and/or modify it under
5: * the terms of the GNU General Public License as published by the Free Software
6: * Foundation, either version 3 of the License, or (at your option) any
7: * later version.
8: *
9: * This program is distributed in the hope that it will be useful, but WITHOUT
10: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11: * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
12: * details. You should have received a copy of the GNU General Public License
13: * along with this program. If not, see <http://www.gnu.org/licenses/>.
14: */
15: package cz.cvut.kbss.jopa.query.criteria.expressions;
16:
17: import cz.cvut.kbss.jopa.query.criteria.CriteriaParameterFiller;
18: import cz.cvut.kbss.jopa.sessions.CriteriaBuilder;
19:
20: public abstract class AbstractComparisonExpression extends AbstractExpression<Boolean> {
21:
22: protected AbstractExpression<?> right;
23: protected AbstractExpression<?> left;
24:
25: public AbstractComparisonExpression(AbstractExpression<?> left, AbstractExpression<?> right, CriteriaBuilder cb) {
26: super(Boolean.class, cb);
27: this.left = left;
28: this.right = right;
29: }
30:
31: @Override
32: public void setExpressionToQuery(StringBuilder query, CriteriaParameterFiller parameterFiller) {
33: this.left.setExpressionToQuery(query, parameterFiller);
34: query.append(this.getComparisonOperator());
35: this.right.setExpressionToQuery(query, parameterFiller);
36: }
37:
38: protected abstract String getComparisonOperator();
39: }
40:
41: