Merge pull request #3 from ProsperousRF/Week4

Week4

Week4/Week4.iml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library" exported="">
+      <library>
+        <CLASSES>
+          <root url="jar://$MODULE_DIR$/../../apache-csv.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES>
+          <root url="jar://$MODULE_DIR$/../../apache-csv.jar!/" />
+        </SOURCES>
+      </library>
+    </orderEntry>
+    <orderEntry type="module-library" exported="">
+      <library>
+        <CLASSES>
+          <root url="jar://$MODULE_DIR$/../../courserajava.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES>
+          <root url="jar://$MODULE_DIR$/../../courserajava.jar!/" />
+        </SOURCES>
+      </library>
+    </orderEntry>
+  </component>
+</module>

Week4/src/AllFilters.java

@@ -0,0 +1,24 @@
+import java.util.ArrayList;
+
+public class AllFilters implements Filter {
+  ArrayList<Filter> filters;
+
+  public AllFilters() {
+    filters = new ArrayList<>();
+  }
+
+  public void addFilter(Filter f) {
+    filters.add(f);
+  }
+
+  @Override
+  public boolean satisfies(String id) {
+    for (Filter f : filters) {
+      if (!f.satisfies(id)) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+}

Week4/src/DirectorsFilter.java

@@ -0,0 +1,25 @@
+/**
+ * A class for filter movies by directors
+ *
+ * @author Stanislav Rakitov
+ * @version 1.0
+ */
+public class DirectorsFilter implements Filter {
+  String directors;
+
+  public DirectorsFilter(String directors) {
+    this.directors = directors;
+  }
+
+  @Override
+  public boolean satisfies(String id) {
+    String movieDirectors = MovieDatabase.getDirector(id);
+    String[] filterDirectors = directors.split(",");
+    for (String direcor : filterDirectors) {
+      if (movieDirectors.contains(direcor)) {
+        return true;
+      }
+    }
+    return false;
+  }
+}

Week4/src/EfficientRater.java

@@ -0,0 +1,51 @@
+import java.util.ArrayList;
+import java.util.HashMap;
+
+/**
+ * The class EfficientRater keeps track of one rater and all their ratings.
+ *
+ * @author Stanislav Rakitov
+ * @version 1.0
+ */
+public class EfficientRater implements Rater {
+  private final String myID;
+  private final HashMap<String, Rating> myRatings;
+
+  public EfficientRater(String id) {
+    myID = id;
+    myRatings = new HashMap<>();
+  }
+
+  public void addRating(String movieID, double rating) {
+    myRatings.put(movieID, new Rating(movieID, rating));
+  }
+
+  public boolean hasRating(String movieID) {
+    return myRatings.containsKey(movieID);
+  }
+
+  public String getID() {
+    return myID;
+  }
+
+  public double getRating(String movieID) {
+    Rating rating = myRatings.get(movieID);
+    if (rating != null) {
+      return rating.getValue();
+    } else {
+      return -1;
+    }
+  }
+
+  public int numRatings() {
+    return myRatings.size();
+  }
+
+  public ArrayList<String> getItemsRated() {
+    return new ArrayList<>(myRatings.keySet());
+  }
+
+  public HashMap<String, Rating> getMyRatings() {
+    return myRatings;
+  }
+}

Week4/src/Filter.java

@@ -0,0 +1,3 @@
+public interface Filter {
+  boolean satisfies(String id);
+}