Mercurial > hg > release > thermostat-1.0
view storage/core/src/main/java/com/redhat/thermostat/storage/internal/statement/NotBooleanExpressionNode.java @ 1412:a0592d702416
Update copyright year in release branch.
reviewed-by: neugens
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2014-June/009965.html
PR1821
author | Jon VanAlten <jon.vanalten@redhat.com> |
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date | Tue, 03 Jun 2014 11:55:56 -0600 |
parents | 03ed49a50413 |
children |
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/* * Copyright 2012-2014 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.storage.internal.statement; import java.util.Objects; import com.redhat.thermostat.storage.core.IllegalPatchException; import com.redhat.thermostat.storage.core.PreparedParameter; import com.redhat.thermostat.storage.query.ComparisonExpression; import com.redhat.thermostat.storage.query.UnaryLogicalExpression; import com.redhat.thermostat.storage.query.UnaryLogicalOperator; /** * A node representing a boolean not expression in the prepared statement's * parse tree. * */ class NotBooleanExpressionNode extends UnaryExpressionNode { NotBooleanExpressionNode(Node parent) { super(parent); } @Override public UnaryLogicalOperator getOperator() { return UnaryLogicalOperator.NOT; } @Override public PatchedWhereExpression patch(PreparedParameter[] params) throws IllegalPatchException { if (getValue() == null || !(getValue() instanceof Node) ) { String msg = getClass().getSimpleName() + " invalid when attempted to patch"; IllegalStateException cause = new IllegalStateException(msg); throw new IllegalPatchException(cause); } Node node = (Node)getValue(); PatchedWhereExpression patched = node.patch(params); // If this cast fails we are in serious trouble. Mongodb doesn't support // something like NOT ( a AND b ). However, the grammar does not support // parenthesized expressions, NOT has higher precedence as AND/OR // expressions and the LHS and RHS of binary boolean expressions are // required to be binary comparison expressions. // Hence, we wouldn't parse an expression such as the above anyway. ComparisonExpression expr = (ComparisonExpression)patched.getExpression(); UnaryLogicalExpression<ComparisonExpression> notExpr = new UnaryLogicalExpression<>( expr, getOperator()); return new PatchedWhereExpressionImpl(notExpr); } @Override public boolean equals(Object other) { if (other == null) { return false; } if (!(other instanceof NotBooleanExpressionNode)) { return false; } NotBooleanExpressionNode o = (NotBooleanExpressionNode)other; return Objects.equals(getValue(), o.getValue()); } @Override public int hashCode() { return Objects.hash(getOperator(), getValue()); } }