refactor: migrate Xtend to Java - com.avaloq.tools.ddk.xtext.ui

com.avaloq.tools.ddk.xtext.ui/.classpath

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
 	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="src" path="xtend-gen"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins">
 		<accessrules>

com.avaloq.tools.ddk.xtext.ui/.project

@@ -20,11 +20,6 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
-		<buildCommand>
-			<name>org.eclipse.xtext.ui.shared.xtextBuilder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
 		<buildCommand>
 			<name>net.sf.eclipsecs.core.CheckstyleBuilder</name>
 			<arguments>
@@ -44,7 +39,6 @@
 	<natures>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.pde.PluginNature</nature>
-		<nature>org.eclipse.xtext.ui.shared.xtextNature</nature>
 		<nature>net.sourceforge.pmd.eclipse.plugin.pmdNature</nature>
 		<nature>net.sf.eclipsecs.core.CheckstyleNature</nature>
 		<nature>edu.umd.cs.findbugs.plugin.eclipse.findbugsNature</nature>

com.avaloq.tools.ddk.xtext.ui/META-INF/MANIFEST.MF

@@ -10,7 +10,6 @@ Require-Bundle: com.avaloq.tools.ddk.xtext,
  org.eclipse.jdt.core,
  org.eclipse.xtext.ui,
  org.eclipse.xtext.ui.shared,
- org.eclipse.xtext.xbase.lib,
  org.eclipse.search,
  org.eclipse.ui.ide,
  org.apache.commons.lang3,

com.avaloq.tools.ddk.xtext.ui/build.properties

@@ -1,5 +1,4 @@
-source.. = src/,\
-           xtend-gen/
+source.. = src/
 bin.includes = META-INF/,\
                icons/,\
                schema/,\

com.avaloq.tools.ddk.xtext.ui/src/com/avaloq/tools/ddk/xtext/ui/templates/TemplateProposalProviderHelper.java

@@ -0,0 +1,88 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Avaloq Group AG and others.
+ * 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:
+ *     Avaloq Group AG - initial API and implementation
+ *******************************************************************************/
+package com.avaloq.tools.ddk.xtext.ui.templates;
+
+import java.util.Arrays;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+import org.apache.commons.lang3.Validate;
+import org.apache.commons.text.StringEscapeUtils;
+
+import com.google.inject.Singleton;
+
+/**
+ * Helper methods for {@link org.eclipse.xtext.ui.editor.contentassist.ITemplateProposalProvider ITemplateProposalProvider} implementations.
+ */
+@Singleton
+@SuppressWarnings("nls")
+public class TemplateProposalProviderHelper {
+
+  private static final String SIMPLE_ENUM_TYPE = new SimpleEnumTemplateVariableResolver().getType();
+
+  /**
+   * Create a literal value pattern, including quotes if necessary, for a {@link org.eclipse.jface.text.templates.Template Template}.
+   *
+   * @param name          the name of the variable, may not be {@code null} nor contain whitespace
+   * @param defaultValue  default value, may be {@code null}
+   * @return  pattern, never {@code null}
+   * @throws NullPointerException if name is null
+   * @throws IllegalArgumentException if name contains whitespace
+   */
+  public String createLiteralValuePattern(final String name, final Object defaultValue) throws NullPointerException, IllegalArgumentException {
+    final String pattern = createTemplateVariablePattern(SIMPLE_ENUM_TYPE, name, defaultValue);
+
+    if (defaultValue instanceof String) {
+      // Surround pattern with quotes
+      return "\"" + pattern + "\"";
+    } else {
+      return pattern;
+    }
+  }
+
+  /**
+   * Create a variable pattern for a {@link org.eclipse.jface.text.templates.Template Template}.
+   *
+   * @param   type    the type of the variable, may not be {@code null} nor contain whitespace
+   * @param   name    the name of the variable, may not be {@code null} nor contain whitespace
+   * @param   values  the values available at this variable, may not be {@code null} nor empty
+   * @return  pattern, never {@code null}
+   * @throws NullPointerException if type, name or values is null
+   * @throws IllegalArgumentException if type or name contains whitespace or values is empty
+   */
+  public String createTemplateVariablePattern(final String type, final String name, final Object... values) throws NullPointerException, IllegalArgumentException {
+    Objects.requireNonNull(type);
+    Objects.requireNonNull(name);
+    Objects.requireNonNull(values);
+    Validate.isTrue(!type.chars().anyMatch(Character::isWhitespace));
+    Validate.isTrue(!name.chars().anyMatch(Character::isWhitespace));
+    Validate.notEmpty(values);
+
+    final Object[] useValues;
+    if (values.length == 1 && values[0] instanceof Boolean) {
+      // Offer both false and true as dropdown options
+      useValues = new Object[] {values[0], !((Boolean) values[0])};
+    } else {
+      useValues = values;
+    }
+
+    final String sanitisedValues = Arrays.stream(useValues)
+        .map(it ->
+            // Escape double-quotes to comply with string grammar.
+            // Double-up single-quotes to comply with template pattern grammar.
+            // Wrap each value in single quotes.
+            "'" + StringEscapeUtils.escapeJava(String.valueOf(it)).replace("'", "''") + "'")
+        .collect(Collectors.joining(", "));
+
+    return "${" + name + ":" + type + "(" + sanitisedValues + ")}";
+  }
+
+}