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| 1 | +package com.regexsolver.api; |
| 2 | + |
| 3 | +import com.fasterxml.jackson.databind.ObjectMapper; |
| 4 | +import com.regexsolver.api.Request.GenerateStringsRequest; |
| 5 | +import com.regexsolver.api.Request.MultiTermsRequest; |
| 6 | +import com.regexsolver.api.Response.BooleanResponse; |
| 7 | +import com.regexsolver.api.Response.StringsResponse; |
| 8 | +import com.regexsolver.api.dto.Details; |
| 9 | +import com.regexsolver.api.exception.ApiError; |
| 10 | +import com.regexsolver.api.exception.MissingAPITokenException; |
| 11 | +import okhttp3.OkHttpClient; |
| 12 | +import okhttp3.Request; |
| 13 | +import okhttp3.ResponseBody; |
| 14 | +import retrofit2.Call; |
| 15 | +import retrofit2.Response; |
| 16 | +import retrofit2.Retrofit; |
| 17 | +import retrofit2.converter.jackson.JacksonConverterFactory; |
| 18 | +import retrofit2.http.Body; |
| 19 | +import retrofit2.http.POST; |
| 20 | + |
| 21 | +import java.io.IOException; |
| 22 | +import java.util.List; |
| 23 | +import java.util.Objects; |
| 24 | + |
| 25 | +final class RegexSolverApiWrapper { |
| 26 | + private static final RegexSolverApiWrapper INSTANCE = new RegexSolverApiWrapper(); |
| 27 | + |
| 28 | + private final static String DEFAULT_BASE_URL = "https://api.regexsolver.com/"; |
| 29 | + |
| 30 | + private final static String USER_AGENT = "RegexSolver Java / 1.0.0"; |
| 31 | + |
| 32 | + private RegexApi api; |
| 33 | + |
| 34 | + public static RegexSolverApiWrapper getInstance() { |
| 35 | + return INSTANCE; |
| 36 | + } |
| 37 | + |
| 38 | + private RegexSolverApiWrapper() { |
| 39 | + initializeInternal(null, DEFAULT_BASE_URL); |
| 40 | + } |
| 41 | + |
| 42 | + public static void initialize(String token) { |
| 43 | + getInstance().initializeInternal(token, DEFAULT_BASE_URL); |
| 44 | + } |
| 45 | + |
| 46 | + public static void initialize(String token, String baseUrl) { |
| 47 | + getInstance().initializeInternal(token, baseUrl); |
| 48 | + } |
| 49 | + |
| 50 | + private void initializeInternal(String token, String baseUrl) { |
| 51 | + Retrofit retrofit = new Retrofit.Builder() |
| 52 | + .client(new OkHttpClient.Builder().addInterceptor(chain -> { |
| 53 | + if (token == null) { |
| 54 | + throw new MissingAPITokenException(); |
| 55 | + } |
| 56 | + Request newRequest = chain.request().newBuilder() |
| 57 | + .addHeader("User-Agent", USER_AGENT) |
| 58 | + .addHeader("Authorization", "Bearer " + token) |
| 59 | + .build(); |
| 60 | + return chain.proceed(newRequest); |
| 61 | + }).build()) |
| 62 | + .baseUrl(baseUrl) |
| 63 | + .addConverterFactory(JacksonConverterFactory.create()) |
| 64 | + .build(); |
| 65 | + |
| 66 | + api = retrofit.create(RegexApi.class); |
| 67 | + } |
| 68 | + |
| 69 | + public Term computeIntersection(MultiTermsRequest multiTermsRequest) throws ApiError, IOException { |
| 70 | + Response<Term> response = api.computeIntersection(multiTermsRequest).execute(); |
| 71 | + if (response.isSuccessful()) { |
| 72 | + return response.body(); |
| 73 | + } else { |
| 74 | + throw getApiError(response); |
| 75 | + } |
| 76 | + } |
| 77 | + |
| 78 | + public Term computeUnion(MultiTermsRequest multiTermsRequest) throws ApiError, IOException { |
| 79 | + Response<Term> response = api.computeUnion(multiTermsRequest).execute(); |
| 80 | + if (response.isSuccessful()) { |
| 81 | + return response.body(); |
| 82 | + } else { |
| 83 | + throw getApiError(response); |
| 84 | + } |
| 85 | + } |
| 86 | + |
| 87 | + public Term computeSubtraction(MultiTermsRequest multiTermsRequest) throws ApiError, IOException { |
| 88 | + Response<Term> response = api.computeSubtraction(multiTermsRequest).execute(); |
| 89 | + if (response.isSuccessful()) { |
| 90 | + return response.body(); |
| 91 | + } else { |
| 92 | + throw getApiError(response); |
| 93 | + } |
| 94 | + } |
| 95 | + |
| 96 | + public Details getDetails(Term term) throws ApiError, IOException { |
| 97 | + Response<Details> response = api.getDetails(term).execute(); |
| 98 | + if (response.isSuccessful()) { |
| 99 | + return response.body(); |
| 100 | + } else { |
| 101 | + throw getApiError(response); |
| 102 | + } |
| 103 | + } |
| 104 | + |
| 105 | + public boolean equivalence(MultiTermsRequest multiTermsRequest) throws ApiError, IOException { |
| 106 | + Response<BooleanResponse> response = api.equivalence(multiTermsRequest).execute(); |
| 107 | + if (response.isSuccessful()) { |
| 108 | + return response.body().value(); |
| 109 | + } else { |
| 110 | + throw getApiError(response); |
| 111 | + } |
| 112 | + } |
| 113 | + |
| 114 | + public boolean subset(MultiTermsRequest multiTermsRequest) throws ApiError, IOException { |
| 115 | + Response<BooleanResponse> response = api.subset(multiTermsRequest).execute(); |
| 116 | + if (response.isSuccessful()) { |
| 117 | + return response.body().value(); |
| 118 | + } else { |
| 119 | + throw getApiError(response); |
| 120 | + } |
| 121 | + } |
| 122 | + |
| 123 | + public List<String> generateStrings(Term term, int count) throws ApiError, IOException { |
| 124 | + GenerateStringsRequest generateStringsRequest = new GenerateStringsRequest(term, count); |
| 125 | + Response<StringsResponse> response = api.generateStrings(generateStringsRequest).execute(); |
| 126 | + if (response.isSuccessful()) { |
| 127 | + return response.body().value(); |
| 128 | + } else { |
| 129 | + throw getApiError(response); |
| 130 | + } |
| 131 | + } |
| 132 | + |
| 133 | + private static <T> ApiError getApiError(Response<T> response) throws IOException { |
| 134 | + assert !response.isSuccessful(); |
| 135 | + try (ResponseBody errorBody = response.errorBody()) { |
| 136 | + String json = Objects.requireNonNull(errorBody).string(); |
| 137 | + ObjectMapper mapper = new ObjectMapper(); |
| 138 | + return mapper.readValue(json, ApiError.class); |
| 139 | + } |
| 140 | + } |
| 141 | + |
| 142 | + private interface RegexApi { |
| 143 | + @POST("api/compute/intersection") |
| 144 | + Call<Term> computeIntersection(@Body MultiTermsRequest multiTermsRequest); |
| 145 | + |
| 146 | + @POST("api/compute/union") |
| 147 | + Call<Term> computeUnion(@Body MultiTermsRequest multiTermsRequest); |
| 148 | + |
| 149 | + @POST("api/compute/subtraction") |
| 150 | + Call<Term> computeSubtraction(@Body MultiTermsRequest multiTermsRequest); |
| 151 | + |
| 152 | + @POST("api/analyze/details") |
| 153 | + Call<Details> getDetails(@Body Term term); |
| 154 | + |
| 155 | + @POST("api/analyze/equivalence") |
| 156 | + Call<BooleanResponse> equivalence(@Body MultiTermsRequest multiTermsRequest); |
| 157 | + |
| 158 | + @POST("api/analyze/subset") |
| 159 | + Call<BooleanResponse> subset(@Body MultiTermsRequest multiTermsRequest); |
| 160 | + |
| 161 | + @POST("api/generate/strings") |
| 162 | + Call<StringsResponse> generateStrings(@Body GenerateStringsRequest request); |
| 163 | + } |
| 164 | +} |
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