Merge branch 'master' of github.com:yegor256/takes

src/main/java/org/takes/facets/fork/FkChain.java

@@ -0,0 +1,83 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.takes.facets.fork;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import org.takes.Request;
+import org.takes.Response;
+import org.takes.misc.Opt;
+
+/**
+ * A Fork chain. Routes to each given Fork in order, until one of them returns
+ * a response or until none are left.
+ * @author Carlos Gines (efrel.v2@gmail.com)
+ * @version $Id$
+ * @since 0.33
+ */
+public final class FkChain implements Fork {
+
+    /**
+     * Forks.
+     */
+    private final transient Collection<Fork> forks;
+
+    /**
+     * Ctor.
+     */
+    public FkChain() {
+        this(Collections.<Fork>emptyList());
+    }
+
+    /**
+     * Ctor.
+     * @param forks Forks
+     */
+    public FkChain(final Fork... forks) {
+        this(Arrays.asList(forks));
+    }
+
+    /**
+     * Ctor.
+     * @param forks Forks
+     */
+    public FkChain(final Collection<Fork> forks) {
+        this.forks = Collections.unmodifiableCollection(forks);
+    }
+
+    @Override
+    public Opt<Response> route(final Request request) throws IOException {
+        Opt<Response> response = new Opt.Empty<Response>();
+        for (final Fork fork : this.forks) {
+            final Opt<Response> current = fork.route(request);
+            if (current.has()) {
+                response = current;
+                break;
+            }
+        }
+        return response;
+    }
+}

src/main/java/org/takes/facets/fork/TkFork.java

@@ -97,13 +97,10 @@ public TkFork(final Collection<Fork> frks) {
 
     @Override
     public Response act(final Request request) throws IOException {
-        for (final Fork fork : this.forks) {
-            final Opt<Response> response = fork.route(request);
-            if (response.has()) {
-                return response.get();
-            }
+        final Opt<Response> response = new FkChain(this.forks).route(request);
+        if (response.has()) {
+            return response.get();
         }
         throw new HttpException(HttpURLConnection.HTTP_NOT_FOUND);
     }
-
 }

src/test/java/org/takes/facets/fork/FkChainTest.java

@@ -0,0 +1,82 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.takes.facets.fork;
+
+import com.google.common.base.Joiner;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.Test;
+import org.takes.rq.RqFake;
+import org.takes.rs.RsPrint;
+
+/**
+ * Test case for {@link FkChain}.
+ * @author Carlos Gines (efrel.v2@gmail.com)
+ * @version $Id$
+ * @since 0.33
+ */
+public final class FkChainTest {
+
+    /**
+     * FkChain can gracefully work when no fork matches the request.
+     * @throws Exception If some problem inside
+     */
+    @Test
+    public void gracefullyHandlesNoForkMatching() throws Exception {
+        MatcherAssert.assertThat(
+            new FkChain(
+                new FkRegex("/doyoumatch?", "Hello. It's me."),
+                new FkRegex("/plzmatch!", "I am your father")
+            ).route(new RqFake("POST", "/idontmatch")).has(),
+            Matchers.equalTo(false)
+        );
+    }
+
+    /**
+     * FkChain can dispatch by regular expression.
+     * @throws Exception If some problem inside
+     */
+    @Test
+    public void dispatchesByRegularExpression() throws Exception {
+        final String body = "hello test!";
+        MatcherAssert.assertThat(
+            new RsPrint(
+                new FkChain(
+                    new FkRegex("/g[a-z]{2}", ""),
+                    new FkRegex("/h[a-z]{2}", body),
+                    new FkRegex("/i[a-z]{2}", "")
+                ).route(new RqFake("GET", "/hey?yu")).get()
+            ).print(),
+            Matchers.equalTo(
+                Joiner.on("\r\n").join(
+                    "HTTP/1.1 200 OK",
+                    String.format("Content-Length: %s", body.length()),
+                    "Content-Type: text/plain",
+                    "",
+                    body
+                )
+            )
+        );
+    }
+}