Phase 1 - refactoring to org.eclipse.jpt.common.*

1 files changed, 52 insertions, 0 deletions

diff --git a/common/plugins/org.eclipse.jpt.common.core/src/org/eclipse/jpt/common/core/internal/utility/jdt/StringExpressionConverter.java b/common/plugins/org.eclipse.jpt.common.core/src/org/eclipse/jpt/common/core/internal/utility/jdt/StringExpressionConverter.java
new file mode 100644
index 0000000000..f0e88b5331
--- /dev/null
+++ b/common/plugins/org.eclipse.jpt.common.core/src/org/eclipse/jpt/common/core/internal/utility/jdt/StringExpressionConverter.java
@@ -0,0 +1,52 @@
+/*******************************************************************************
+ * Copyright (c) 2006, 2008 Oracle. All rights reserved.
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0, which accompanies this distribution
+ * and is available at http://www.eclipse.org/legal/epl-v10.html.
+ * 
+ * Contributors:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.common.core.internal.utility.jdt;
+
+import org.eclipse.jdt.core.dom.AST;
+import org.eclipse.jdt.core.dom.Expression;
+import org.eclipse.jdt.core.dom.StringLiteral;
+import org.eclipse.jpt.common.core.utility.jdt.ExpressionConverter;
+
+/**
+ * Convert a string literal to/from a string (e.g. "text").
+ */
+public final class StringExpressionConverter
+	extends AbstractExpressionConverter<String>
+{
+	private static final ExpressionConverter<String> INSTANCE = new StringExpressionConverter();
+
+	/**
+	 * Return the singleton.
+	 */
+	public static ExpressionConverter<String> instance() {
+		return INSTANCE;
+	}
+
+	/**
+	 * Ensure single instance.
+	 */
+	private StringExpressionConverter() {
+		super();
+	}
+
+	@Override
+	protected StringLiteral convertObject(String string, AST ast) {
+		StringLiteral stringLiteral = ast.newStringLiteral();
+		stringLiteral.setLiteralValue(string);
+		return stringLiteral;
+	}
+
+	@Override
+	protected String convertExpression(Expression expression) {
+		Object value = expression.resolveConstantExpressionValue();
+		return (value instanceof String) ? (String) value : null;
+	}
+
+}