#19 was : parsing inputStream

my-framework/was-practice/src/main/java/org/example/QueryString.java

@@ -0,0 +1,19 @@
+package org.example;
+
+public class QueryString {
+    private final String key;
+    private final String value;
+
+    public QueryString(String key, String value) {
+        this.key = key;
+        this.value = value;
+    }
+
+    public boolean exist(String key) {
+        return this.key.equals(key);
+    }
+
+    public String getValue() {
+        return this.value;
+    }
+}

my-framework/was-practice/src/main/java/org/example/QueryStrings.java

@@ -0,0 +1,31 @@
+package org.example;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class QueryStrings {
+
+    private final List<QueryString> queryStrings = new ArrayList<>();
+
+    public QueryStrings(String queryStringLine) {
+        String[] queryStringTokens = queryStringLine.split("&");
+
+        Arrays.stream(queryStringTokens)
+                .forEach(queryString -> {
+                    String[] values = queryString.split("=");
+                    if (values.length != 2) {
+                        throw new IllegalArgumentException("잘못된 QueryString 포맷을 가진 문자열입니다.");
+                    }
+                    queryStrings.add(new QueryString(values[0], values[1]));
+                });
+    }
+
+    public String getValue(String key) {
+        return this.queryStrings.stream()
+                .filter(queryString -> queryString.exist(key))
+                .map(QueryString::getValue)
+                .findFirst()
+                .orElse(null);
+    }
+}

my-framework/was-practice/src/main/java/org/example/RequestLine.java

@@ -0,0 +1,53 @@
+package org.example;
+
+import java.util.Objects;
+
+public class RequestLine {
+    private final String method;
+    private final String urlPath;
+
+    private QueryStrings queryStrings;
+
+    public RequestLine(String method, String urlPath, String queryString) {
+        this.method = method;
+        this.urlPath = urlPath;
+        this.queryStrings = new QueryStrings(queryString);
+    }
+
+    public RequestLine(String requestLine) {
+        String[] tokens = requestLine.split(" ");
+        this.method = tokens[0];
+
+        String[] urlPathTokens = tokens[1].split("\\?");
+        this.urlPath = urlPathTokens[0];
+
+        if (urlPathTokens.length == 2) {
+            this.queryStrings = new QueryStrings(urlPathTokens[1]);
+        }
+    }
+
+    public boolean isGetRequest() {
+        return "GET".equals(this.method);
+    }
+
+    public boolean matchPath(String requestPath) {
+        return this.urlPath.equals(requestPath);
+    }
+
+    public QueryStrings getQueryStrings() {
+        return this.queryStrings;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof RequestLine)) return false;
+        RequestLine that = (RequestLine) o;
+        return Objects.equals(method, that.method) && Objects.equals(urlPath, that.urlPath) && Objects.equals(queryStrings, that.queryStrings);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(method, urlPath, queryStrings);
+    }
+}

my-framework/was-practice/src/test/java/org/example/QueryStringTest.java

@@ -0,0 +1,14 @@
+package org.example;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class QueryStringTest {
+
+    @Test
+    void createTest() {
+        QueryString queryString = new QueryString("operand1", "11");
+
+        Assertions.assertThat(queryString).isNotNull();
+    }
+}

my-framework/was-practice/src/test/java/org/example/QueryStringsTest.java

@@ -0,0 +1,14 @@
+package org.example;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class QueryStringsTest {
+
+    @Test
+    void createTest() {
+        QueryStrings queryStrings = new QueryStrings("operand1=11&operator=*&operand2=55");
+
+        Assertions.assertThat(queryStrings).isNotNull();
+    }
+}

my-framework/was-practice/src/test/java/org/example/RequestLineTest.java

@@ -0,0 +1,16 @@
+package org.example;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class RequestLineTest {
+
+    @Test
+    void create() {
+        RequestLine requestLine = new RequestLine("GET /calculate?operand1=11&operator=*&operand2=55");
+
+        assertThat(requestLine).isNotNull();
+        assertThat(requestLine).isEqualTo(new RequestLine("GET", "/calculate", "operand1=11&operator=*&operand2=55"));
+    }
+}