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• package-info.java

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org.apache.lucene.expressions.js.package-info Maven / Gradle / Ivy

/*
 * 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.
 */

/**
 * Javascript expressions.
 *
 * 
A Javascript expression is a numeric expression specified using an expression syntax that's
 * based on JavaScript expressions. You can construct expressions using:
 *
 * 

 *   
Integer, floating point, hex and octal literals
 *   
Arithmetic operators: + - * / %
 *   
Bitwise operators: | & ^ ~ << >> >>>
 *   
Boolean operators (including the ternary operator): && || ! ?:
 *   
Comparison operators: < <= == >= >
 *   
Common mathematic functions: abs ceil exp floor ln log10 logn max min sqrt pow
 *   
Trigonometric library functions: 
 *       acosh acos asinh asin atanh atan atan2 cosh cos sinh sin tanh tan
 *   
Distance functions: haversin haversinMeters
 *   
Miscellaneous functions: min, max
 *   
Arbitrary external variables - see {@link org.apache.lucene.expressions.Bindings}
 * 
 *
 * 
JavaScript order of precedence rules apply for operators. Shortcut evaluation is used for
 * logical operators—the second argument is only evaluated if the value of the expression cannot be
 * determined after evaluating the first argument. For example, in the expression a || b
 * , b is only evaluated if a is not true.
 *
 * 
To compile an expression, use {@link org.apache.lucene.expressions.js.JavascriptCompiler}.
 */
package org.apache.lucene.expressions.js;