Java02. ДЗ 02, Васильев Роман

build.gradle

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+group 'com.github.nizshee'
+version '1.0-SNAPSHOT'
+
+apply plugin: 'java'
+
+sourceCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile group: 'berkeleydb', name: 'je', version: '3.2.76'
+    testCompile group: 'junit', name: 'junit', version: '4.11'
+}

gradle/wrapper/gradle-wrapper.properties

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+#Fri Sep 16 16:31:37 MSK 2016
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.13-bin.zip

settings.gradle

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+rootProject.name = 'lazy-factory'
+rootProject.name = 'hw11'
+

src/main/java/com/github/nizshee/Main.java

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+package com.github.nizshee;
+
+
+import com.github.nizshee.cvs.CVS;
+import com.github.nizshee.exception.StateException;
+import com.github.nizshee.exception.WorkspaceException;
+import com.github.nizshee.frontend.Frontend;
+import com.github.nizshee.index.InMemoryIndex;
+import com.github.nizshee.tags.InMemoryTags;
+import com.github.nizshee.tags.Tags;
+import com.github.nizshee.workspace.FileWorkspace;
+
+import java.io.*;
+import java.nio.file.Paths;
+import java.util.*;
+
+public class Main {
+
+    private final static String CVS = ".cvs";
+    private final static String TAGS = ".tags";
+    private final static String WORKDIR = "workdir";
+
+    @SuppressWarnings("ResultOfMethodCallIgnored")
+    public static void main(String args[]) throws Exception {
+
+        Paths.get(WORKDIR).toFile().mkdirs();
+
+        Tags tags = restoreTags();
+        CVS cvs = restoreCVS();
+
+
+        Frontend frontend = new Frontend(tags, cvs);
+        frontend.eval(args);
+
+        if (cvs.current() != null) {
+            dumpTags(tags);
+            dumpCVS(cvs);
+        }
+    }
+
+    private static CVS restoreCVS() throws IOException, ClassNotFoundException, WorkspaceException, StateException {
+        try (FileInputStream fis = new FileInputStream(WORKDIR + "/" + CVS)) {
+            ObjectInputStream ois = new ObjectInputStream(fis);
+            return (CVS) ois.readObject();
+        } catch (FileNotFoundException ignore) {
+            return new CVS(new FileWorkspace(WORKDIR), new InMemoryIndex(new HashMap<>()),
+                    Arrays.asList(CVS, TAGS));
+        }
+    }
+
+    private static void dumpCVS(CVS cvs) throws IOException {
+        FileOutputStream fos = new FileOutputStream(WORKDIR + "/" + CVS);
+        ObjectOutputStream oos = new ObjectOutputStream(fos);
+        oos.writeObject(cvs);
+        fos.close();
+    }
+
+    private static Tags restoreTags() throws IOException, ClassNotFoundException {
+        try (FileInputStream fis = new FileInputStream(WORKDIR + "/" + TAGS)) {
+            ObjectInputStream ois = new ObjectInputStream(fis);
+            return (Tags) ois.readObject();
+        } catch (FileNotFoundException ignore) {
+            return new InMemoryTags();
+        }
+    }
+
+    private static void dumpTags(Tags tags) throws IOException {
+        FileOutputStream fos = new FileOutputStream(WORKDIR + "/" + TAGS);
+        ObjectOutputStream oos = new ObjectOutputStream(fos);
+        oos.writeObject(tags);
+        fos.close();
+    }
+}