software.amazon.awssdk.services.connect.endpoints.internal.Substring Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of connect Show documentation

The AWS Java SDK for Connect module holds the client classes that are used for communicating with Connect.

There is a newer version: 2.29.15

/*
 * 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://aws.amazon.com/apache2.0
 * 
 * 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 software.amazon.awssdk.services.connect.endpoints.internal;

import java.util.List;
import software.amazon.awssdk.annotations.SdkInternalApi;

@SdkInternalApi
public class Substring extends VarargFn {
    public static final String ID = "substring";
    public static final Identifier SUBSTRING = Identifier.of("substring");
    private static final int EXPECTED_NUMBER_ARGS = 4;

    public Substring(FnNode fnNode) {
        super(fnNode);
    }

    @Override
    public  T acceptFnVisitor(FnVisitor visitor) {
        return visitor.visitSubstring(this);
    }

    public static Substring ofExprs(Expr expr, int startIndex, int stopIndex, Boolean reverse) {
        return new Substring(FnNode.ofExprs(ID, expr, Expr.of(startIndex), Expr.of(stopIndex), Expr.of(reverse)));
    }

    public Expr stringToParse() {
        return expectVariableArgs(EXPECTED_NUMBER_ARGS).get(0);
    }

    public Expr startIndex() {
        return expectVariableArgs(EXPECTED_NUMBER_ARGS).get(1);
    }

    public Expr stopIndex() {
        return expectVariableArgs(EXPECTED_NUMBER_ARGS).get(2);
    }

    public Expr reverse() {
        return expectVariableArgs(EXPECTED_NUMBER_ARGS).get(3);
    }

    @Override
    public Value eval(Scope scope) {
        List args = expectVariableArgs(EXPECTED_NUMBER_ARGS);
        String str = args.get(0).eval(scope).expectString();
        int startIndex = args.get(1).eval(scope).expectInt();
        int stopIndex = args.get(2).eval(scope).expectInt();
        boolean reverse = args.get(3).eval(scope).expectBool();

        if (startIndex >= stopIndex || str.length() - 1 < stopIndex) {
            return new Value.None();
        }

        String substr;
        if (reverse) {
            String reversedStr = new StringBuilder(str).reverse().toString();
            substr = new StringBuilder(reversedStr.substring(startIndex, stopIndex)).reverse().toString();
        } else {
            substr = str.substring(startIndex, stopIndex);
        }

        return Value.fromStr(substr);

    }
}