Basic models for the Compare api controller

ace-am/src/main/java/edu/umiacs/ace/rest/models/CompareFile.java

+package edu.umiacs.ace.rest.models;
+
+/**
+ * Individual item in a Compare Request
+ *
+ * Created by shake on 3/9/17.
+ */
+public class CompareFile {
+
+    private String path;
+    private String digest;
+
+    public String getPath() {
+        return path;
+    }
+
+    public String getDigest() {
+        return digest;
+    }
+
+    public CompareFile setPath(String path) {
+        this.path = path;
+        return this;
+    }
+
+    public CompareFile setDigest(String digest) {
+        this.digest = digest;
+        return this;
+    }
+}

ace-am/src/main/java/edu/umiacs/ace/rest/models/CompareRequest.java

+package edu.umiacs.ace.rest.models;
+
+import edu.umiacs.ace.rest.CompareController;
+
+import java.util.List;
+
+/**
+ * The request body sent to the {@link CompareController}
+ *
+ * Created by shake on 3/9/17.
+ */
+public class CompareRequest {
+
+    private List<CompareFile> comparisons;
+
+    public List<CompareFile> getComparisons() {
+        return comparisons;
+    }
+
+    public CompareRequest setComparisons(List<CompareFile> comparisons) {
+        this.comparisons = comparisons;
+        return this;
+    }
+}

ace-am/src/main/java/edu/umiacs/ace/rest/models/CompareResponse.java

+package edu.umiacs.ace.rest.models;
+
+import edu.umiacs.ace.rest.CompareController;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Response object returned by the {@link CompareController}
+ *
+ * Created by shake on 3/9/17.
+ */
+public class CompareResponse {
+
+    private Set<String> diff;
+    private Set<String> match;
+    private Set<String> notFound;
+
+    public CompareResponse() {
+        this.diff = new HashSet<>();
+        this.match = new HashSet<>();
+        this.notFound = new HashSet<>();
+    }
+
+    public CompareResponse addDiff(String path) {
+        diff.add(path);
+        return this;
+    }
+
+    public Set<String> getDiff() {
+        return diff;
+    }
+
+    public CompareResponse setDiff(Set<String> diff) {
+        this.diff = diff;
+        return this;
+    }
+
+    public CompareResponse addMatch(String path) {
+        match.add(path);
+        return this;
+    }
+
+    public Set<String> getMatch() {
+        return match;
+    }
+
+    public CompareResponse setMatch(Set<String> match) {
+        this.match = match;
+        return this;
+    }
+
+    public CompareResponse addNotFound(String path) {
+        notFound.add(path);
+        return this;
+    }
+
+    public Set<String> getNotFound() {
+        return notFound;
+    }
+
+    public CompareResponse setNotFound(Set<String> notFound) {
+        this.notFound = notFound;
+        return this;
+    }
+}