Avoid exception from StringLiteral.getLiteralValue()

Author: BoykoAlex

headless-services/commons/pom.xml

@@ -153,6 +153,11 @@
 				<artifactId>org.eclipse.jgit</artifactId>
 				<version>${jgit-version}</version>
 			</dependency>
+			<dependency>
+				<groupId>org.apache.commons</groupId>
+				<artifactId>commons-text</artifactId>
+				<version>1.12.0</version>
+			</dependency>
         </dependencies>
     </dependencyManagement>
 

headless-services/spring-boot-language-server/pom.xml

@@ -134,6 +134,11 @@
 			<artifactId>json</artifactId>
 			<version>20231013</version>
 		</dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-text</artifactId>
+		</dependency>
+
 
 		<dependency>
 			<groupId>org.eclipse.lemminx</groupId>

headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/java/embedded/lang/StringLiteralLanguageSnippet.java

@@ -13,6 +13,7 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import org.apache.commons.text.StringEscapeUtils;
 import org.eclipse.jdt.core.dom.StringLiteral;
 import org.springframework.ide.vscode.commons.util.text.IRegion;
 import org.springframework.ide.vscode.commons.util.text.Region;
@@ -31,8 +32,12 @@ public class StringLiteralLanguageSnippet implements EmbeddedLanguageSnippet {
 	 */
 	private transient List<Region> specialRegions;
 
+	private static String getLiteralValueStr(String escaped) {
+		return StringEscapeUtils.unescapeJava(escaped.substring(1, escaped.length() - 1));
+	}
+	
 	public StringLiteralLanguageSnippet(StringLiteral literal) {
-		this(literal.getEscapedValue(), literal.getLiteralValue(), literal.getStartPosition());
+		this(literal.getEscapedValue(), getLiteralValueStr(literal.getEscapedValue()), literal.getStartPosition());
 	}
 
 	public StringLiteralLanguageSnippet(String escapedValue, String literalValue, int literalOffset) {

headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/java/embedded/lang/TextBlockLanguageSnippet.java

@@ -13,6 +13,7 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import org.apache.commons.text.StringEscapeUtils;
 import org.eclipse.jdt.core.dom.TextBlock;
 import org.springframework.ide.vscode.commons.util.text.IRegion;
 import org.springframework.ide.vscode.commons.util.text.Region;
@@ -26,8 +27,12 @@ public class TextBlockLanguageSnippet implements EmbeddedLanguageSnippet {
 	private transient int startOffset;
 	private transient List<Region> specialRegions;
 
+	private static String getLiteralValueStr(String escaped) {
+		return StringEscapeUtils.unescapeJava(escaped.substring(3, escaped.length() - 3));
+	}
+
 	public TextBlockLanguageSnippet(TextBlock block) {
-		this(block.getEscapedValue(), block.getLiteralValue(), block.getStartPosition());
+		this(block.getEscapedValue(), getLiteralValueStr(block.getEscapedValue()), block.getStartPosition());
 	}
 
 	public TextBlockLanguageSnippet(String escapedValue, String literalValue, int literalOffset) {