Intern context strings (#1488)

Everywhere, but the most burning one is DefDepNode.

Author: cstamas

maven-resolver-api/src/main/java/org/eclipse/aether/collection/CollectRequest.java

@@ -307,7 +307,7 @@ public String getRequestContext() {
      * @return This request for chaining, never {@code null}.
      */
     public CollectRequest setRequestContext(String context) {
-        this.context = (context != null) ? context : "";
+        this.context = (context != null) ? context.intern() : "";
         return this;
     }
 

maven-resolver-api/src/main/java/org/eclipse/aether/graph/DefaultDependencyNode.java

@@ -251,7 +251,7 @@ public String getRequestContext() {
     }
 
     public void setRequestContext(String context) {
-        this.context = (context != null) ? context : "";
+        this.context = (context != null) ? context.intern() : "";
     }
 
     public Map<Object, Object> getData() {

maven-resolver-api/src/main/java/org/eclipse/aether/repository/LocalArtifactRequest.java

@@ -93,7 +93,7 @@ public String getContext() {
      * @return This query for chaining, never {@code null}.
      */
     public LocalArtifactRequest setContext(String context) {
-        this.context = (context != null) ? context : "";
+        this.context = (context != null) ? context.intern() : "";
         return this;
     }
 

maven-resolver-api/src/main/java/org/eclipse/aether/repository/LocalMetadataRequest.java

@@ -89,7 +89,7 @@ public String getContext() {
      * @return This query for chaining, never {@code null}.
      */
     public LocalMetadataRequest setContext(String context) {
-        this.context = (context != null) ? context : "";
+        this.context = (context != null) ? context.intern() : "";
         return this;
     }
 

maven-resolver-api/src/main/java/org/eclipse/aether/resolution/ArtifactDescriptorPolicyRequest.java

@@ -85,7 +85,7 @@ public String getRequestContext() {
      * @return This request for chaining, never {@code null}.
      */
     public ArtifactDescriptorPolicyRequest setRequestContext(String context) {
-        this.context = (context != null) ? context : "";
+        this.context = (context != null) ? context.intern() : "";
         return this;
     }
 

maven-resolver-api/src/main/java/org/eclipse/aether/resolution/ArtifactDescriptorRequest.java

@@ -138,7 +138,7 @@ public String getRequestContext() {
      * @return This request for chaining, never {@code null}.
      */
     public ArtifactDescriptorRequest setRequestContext(String context) {
-        this.context = (context != null) ? context : "";
+        this.context = (context != null) ? context.intern() : "";
         return this;
     }
 

maven-resolver-api/src/main/java/org/eclipse/aether/resolution/ArtifactRequest.java

@@ -176,7 +176,7 @@ public String getRequestContext() {
      * @return This request for chaining, never {@code null}.
      */
     public ArtifactRequest setRequestContext(String context) {
-        this.context = (context != null) ? context : "";
+        this.context = (context != null) ? context.intern() : "";
         return this;
     }
 

maven-resolver-api/src/main/java/org/eclipse/aether/resolution/MetadataRequest.java

@@ -129,7 +129,7 @@ public String getRequestContext() {
      * @return This request for chaining, never {@code null}.
      */
     public MetadataRequest setRequestContext(String context) {
-        this.context = (context != null) ? context : "";
+        this.context = (context != null) ? context.intern() : "";
         return this;
     }
 

maven-resolver-api/src/main/java/org/eclipse/aether/resolution/VersionRangeRequest.java

@@ -138,7 +138,7 @@ public String getRequestContext() {
      * @return This request for chaining, never {@code null}.
      */
     public VersionRangeRequest setRequestContext(String context) {
-        this.context = (context != null) ? context : "";
+        this.context = (context != null) ? context.intern() : "";
         return this;
     }
 

maven-resolver-api/src/main/java/org/eclipse/aether/resolution/VersionRequest.java

@@ -138,7 +138,7 @@ public String getRequestContext() {
      * @return This request for chaining, never {@code null}.
      */
     public VersionRequest setRequestContext(String context) {
-        this.context = (context != null) ? context : "";
+        this.context = (context != null) ? context.intern() : "";
         return this;
     }