org.partiql.pig.util.Capitalizers.kt Maven / Gradle / Ivy

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The P.I.G. is a code generator for domain models such ASTs and execution plans.

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/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * or in the "license" file accompanying this file. This file 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.
 */

package org.partiql.pig.util

fun String.snakeToPascalCase(): String =
    this.split('_')
        .filter { it.isNotEmpty() }
        .joinToString(separator = "") {
            it.capitalize()
        }

fun String.snakeToCamelCase(): String =
    this.split('_')
        .filter { it.isNotEmpty() }
        .mapIndexed { i, str ->
            when(i) {
                0 -> str
                else -> str.capitalize()
            }
        }
        .joinToString(separator = "")

private fun String.capitalize() =
    String(toCharArray().apply { this[0] = this[0].toUpperCase() })