add equals and hashcode support to dslquerybuilder

added equals and hashcode support to dsl query builder

Change-Id: I8affdd5da489e5aeacb5682ba83320a9d99c211d
Issue-ID: SO-1598
Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>

3 files changed, 38 insertions, 12 deletions

diff --git a/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLNode.java b/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLNode.java
index 7da1408f2d..1e4750d2cf 100644
--- a/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLNode.java
+++ b/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLNode.java
@@ -64,13 +64,14 @@ public class DSLNode implements QueryStep {
 	
 	@Override
 	public String build() {
+		StringBuilder result = new StringBuilder(query);
 		if (output) {
-			query.append("*");
+			result.append("*");
 		}
 		for (DSLNodeKey key : nodeKeys) {
-			query.append(key.build());
+			result.append(key.build());
 		}
 		
-		return query.toString();
+		return result.toString();
 	}
 }
diff --git a/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLNodeKey.java b/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLNodeKey.java
index 159bfb1c29..c40a3e6f96 100644
--- a/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLNodeKey.java
+++ b/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLNodeKey.java
@@ -49,11 +49,12 @@ public class DSLNodeKey implements QueryStep {
 	
 	@Override
 	public String build() {
-		
+		StringBuilder result = new StringBuilder(query);
+
 		if (not) {
-			query.append(" !");
+			result.append(" !");
 		}
-		query.append("('").append(keyName).append("', ");
+		result.append("('").append(keyName).append("', ");
 		List<String> temp = new ArrayList<>();
 		for (String item : values) {
 			if (item.equals("null")) {
@@ -64,8 +65,8 @@ public class DSLNodeKey implements QueryStep {
 				temp.add(String.format("'%s'", item));
 			}
 		}
-		query.append(Joiner.on(", ").join(temp)).append(")");
+		result.append(Joiner.on(", ").join(temp)).append(")");
 		
-		return query.toString();
+		return result.toString();
 	}
 }
diff --git a/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLQueryBuilder.java b/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLQueryBuilder.java
index 6554368b6d..3a47c38444 100644
--- a/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLQueryBuilder.java
+++ b/common/src/main/java/org/onap/so/client/graphinventory/entities/DSLQueryBuilder.java
@@ -34,7 +34,7 @@ import com.google.common.base.Joiner;
 public class DSLQueryBuilder<S, E> implements QueryStep {
 
 	private List<QueryStep> steps = new ArrayList<>();
-	
+	private String suffix = "";
 	
 	public DSLQueryBuilder() {
 		
@@ -103,8 +103,9 @@ public class DSLQueryBuilder<S, E> implements QueryStep {
 		return to(__.node(name, key));
 	}
 	
-	public String limit(int limit) {
-		return compile() + " LIMIT " + limit;
+	public DSLQueryBuilder<S, E> limit(int limit) {
+		suffix = " LIMIT " + limit;
+		return this;
 	}
 	
 	@Override
@@ -112,8 +113,31 @@ public class DSLQueryBuilder<S, E> implements QueryStep {
 		return compile();
 	}
 	
+	@Override
+	public String toString() {
+		return build();
+	}
+	
+	@Override
+	public boolean equals(Object o) {
+		if (o != null) {
+			if (o instanceof QueryStep) {
+				return ((QueryStep)o).build().equals(this.build());
+			} else if (o instanceof String) {
+				return o.equals(this.build());
+			}
+		}
+		return false;
+	}
+	
+	@Override
+	public int hashCode() {
+		
+		return build().hashCode();
+	}
+	
 	private String compile() {
-		return Joiner.on(" ").join(steps.stream().map(item -> item.build()).collect(Collectors.toList()));
+		return Joiner.on(" ").join(steps.stream().map(item -> item.build()).collect(Collectors.toList())) + suffix;
 	}
 	
 	protected QueryStep getFirst() {