[refactor] Alert datasource calculate (apache#3253)

Co-authored-by: yinyijun <[email protected]>
Co-authored-by: yinyijun <yingey2011>
Co-authored-by: tomsun28 <[email protected]>

Author: 3 people

hertzbeat-alerter/src/main/java/org/apache/hertzbeat/alert/expr/AlertExpressionBaseVisitor.java

@@ -0,0 +1,113 @@
+/*
+ * 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.
+ */
+
+// Generated from AlertExpression.g4 by ANTLR 4.13.2
+
+package org.apache.hertzbeat.alert.expr;
+
+import org.antlr.v4.runtime.tree.AbstractParseTreeVisitor;
+
+/**
+ * This class provides an empty implementation of {@link AlertExpressionVisitor},
+ * which can be extended to create a visitor which only needs to handle a subset
+ * of the available methods.
+ *
+ * @param <T> The return type of the visit operation. Use {@link Void} for
+ * operations with no return type.
+ */
+@SuppressWarnings("CheckReturnValue")
+public class AlertExpressionBaseVisitor<T> extends AbstractParseTreeVisitor<T> implements AlertExpressionVisitor<T> {
+    /**
+     * {@inheritDoc}
+     *
+     * <p>The default implementation returns the result of calling
+     * {@link #visitChildren} on {@code ctx}.</p>
+     */
+    @Override public T visitExpression(AlertExpressionParser.ExpressionContext ctx) { return visitChildren(ctx); }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>The default implementation returns the result of calling
+     * {@link #visitChildren} on {@code ctx}.</p>
+     */
+    @Override public T visitAndExpr(AlertExpressionParser.AndExprContext ctx) { return visitChildren(ctx); }
+
+    /**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+    @Override public T visitQueryExpr(AlertExpressionParser.QueryExprContext ctx) { return visitChildren(ctx); }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>The default implementation returns the result of calling
+     * {@link #visitChildren} on {@code ctx}.</p>
+     */
+    @Override public T visitComparisonExpr(AlertExpressionParser.ComparisonExprContext ctx) { return visitChildren(ctx); }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>The default implementation returns the result of calling
+     * {@link #visitChildren} on {@code ctx}.</p>
+     */
+    @Override public T visitUnlessExpr(AlertExpressionParser.UnlessExprContext ctx) { return visitChildren(ctx); }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>The default implementation returns the result of calling
+     * {@link #visitChildren} on {@code ctx}.</p>
+     */
+    @Override public T visitLiteralExpr(AlertExpressionParser.LiteralExprContext ctx) { return visitChildren(ctx); }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>The default implementation returns the result of calling
+     * {@link #visitChildren} on {@code ctx}.</p>
+     */
+    @Override public T visitParenExpr(AlertExpressionParser.ParenExprContext ctx) { return visitChildren(ctx); }
+
+    /**
+	 * {@inheritDoc}
+     *
+     * <p>The default implementation returns the result of calling
+     * {@link #visitChildren} on {@code ctx}.</p>
+     */
+    @Override public T visitOrExpr(AlertExpressionParser.OrExprContext ctx) { return visitChildren(ctx); }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>The default implementation returns the result of calling
+     * {@link #visitChildren} on {@code ctx}.</p>
+     */
+    @Override public T visitIdentifier(AlertExpressionParser.IdentifierContext ctx) { return visitChildren(ctx); }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>The default implementation returns the result of calling
+     * {@link #visitChildren} on {@code ctx}.</p>
+     */
+    @Override public T visitNumber(AlertExpressionParser.NumberContext ctx) { return visitChildren(ctx); }
+}