com.jayway.jsonpath.internal.path.ArraySliceOperation Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of com.liferay.dynamic.data.mapping.service Show documentation

Liferay Dynamic Data Mapping Service

The newest version!

package com.jayway.jsonpath.internal.path;

import com.jayway.jsonpath.InvalidPathException;

import static java.lang.Character.isDigit;

public class ArraySliceOperation {

    public enum Operation {
        SLICE_FROM,
        SLICE_TO,
        SLICE_BETWEEN
    }

    private final Integer from;
    private final Integer to;
    private final Operation operation;

    private ArraySliceOperation(Integer from, Integer to, Operation operation) {
        this.from = from;
        this.to = to;
        this.operation = operation;
    }

    public Integer from() {
        return from;
    }

    public Integer to() {
        return to;
    }

    public Operation operation() {
        return operation;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("[");
        sb.append(from == null ? "" : from.toString());
        sb.append(":");
        sb.append(to == null ? "" : to.toString());
        sb.append("]");

        return sb.toString();
    }

    public static ArraySliceOperation parse(String operation){
        //check valid chars
        for (int i = 0; i < operation.length(); i++) {
            char c = operation.charAt(i);
            if( !isDigit(c)  && c != '-' && c != ':'){
                throw new InvalidPathException("Failed to parse SliceOperation: " + operation);
            }
        }
        String[] tokens = operation.split(":");

        Integer tempFrom = tryRead(tokens, 0);
        Integer tempTo = tryRead(tokens, 1);
        Operation tempOperation;

        if (tempFrom != null && tempTo == null) {
            tempOperation = Operation.SLICE_FROM;
        } else if (tempFrom != null) {
            tempOperation = Operation.SLICE_BETWEEN;
        } else if (tempTo != null) {
            tempOperation = Operation.SLICE_TO;
        } else {
            throw new InvalidPathException("Failed to parse SliceOperation: " + operation);
        }

        return new ArraySliceOperation(tempFrom, tempTo, tempOperation);
    }

    private static Integer tryRead(String[] tokens, int idx){
        if(tokens.length > idx){
            if(tokens[idx].equals("")){
                return null;
            }
            return Integer.parseInt(tokens[idx]);
        } else {
            return null;
        }
    }
}