extract JavaCodeFragmentFactory out of PsiElementFactory; remove a number of unnecessary back and forth conversions between Project and PsiManager

java/openapi/src/com/intellij/psi/JavaCodeFragmentFactory.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright 2000-2011 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.psi;
+
+import com.intellij.openapi.components.ServiceManager;
+import com.intellij.openapi.project.Project;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class JavaCodeFragmentFactory {
+  public static JavaCodeFragmentFactory getInstance(Project project) {
+    return ServiceManager.getService(project, JavaCodeFragmentFactory.class);
+  }
+  
+  /**
+   * Creates a Java expression code fragment from the text of the expression.
+   *
+   * @param text         the text of the expression to create.
+   * @param context      the context for resolving references from the code fragment.
+   * @param expectedType expected type of the expression (does not have any effect on creation
+   *                     but can be accessed as {@link PsiExpressionCodeFragment#getExpectedType()}).
+   * @param isPhysical   whether the code fragment is created as a physical element
+   *                     (see {@link PsiElement#isPhysical()}).
+   * @return the created code fragment.
+   */
+  @NotNull
+  public abstract PsiExpressionCodeFragment createExpressionCodeFragment(@NotNull String text, PsiElement context, final PsiType expectedType, boolean isPhysical);
+
+  /**
+   * Creates a Java code fragment from the text of a Java code block.
+   *
+   * @param text       the text of the code block to create.
+   * @param context    the context for resolving references from the code fragment.
+   * @param isPhysical whether the code fragment is created as a physical element
+   *                   (see {@link PsiElement#isPhysical()}).
+   * @return the created code fragment.
+   */
+  @NotNull
+  public abstract JavaCodeFragment createCodeBlockCodeFragment(@NotNull String text, PsiElement context, boolean isPhysical);
+
+  /**
+   * Flag for {@linkplain #createTypeCodeFragment(String, PsiElement, boolean, int)} - allows void type.
+   */
+  public static final int ALLOW_VOID = 0x01;
+  /**
+   * Flag for {@linkplain #createTypeCodeFragment(String, PsiElement, boolean, int)} - allows type with ellipsis.
+   */
+  public static final int ALLOW_ELLIPSIS = 0x02;
+  /**
+   * Flag for {@linkplain #createTypeCodeFragment(String, PsiElement, boolean, int)} - allows disjunctive type.
+   */
+  public static final int ALLOW_DISJUNCTION = 0x04;
+
+  /**
+   * Creates a Java type code fragment from the text of the name of a Java type (the name
+   * of a primitive type, array type or class), with <code>void</code> and ellipsis
+   * not treated as a valid type.
+   *
+   * @param text       the text of the Java type to create.
+   * @param context    the context for resolving references from the code fragment.
+   * @param isPhysical whether the code fragment is created as a physical element
+   *                   (see {@link PsiElement#isPhysical()}).
+   * @return the created code fragment.
+   */
+  @NotNull
+  public abstract PsiTypeCodeFragment createTypeCodeFragment(@NotNull String text, PsiElement context, boolean isPhysical);
+
+  /**
+   * Creates a Java type code fragment from the text of the name of a Java type (the name
+   * of a primitive type, array type or class).<br>
+   * {@code void}, ellipsis and disjunctive types are optionally treated as valid ones.
+   *
+   * @param text       the text of the Java type to create.
+   * @param context    the context for resolving references from the code fragment.
+   * @param isPhysical whether the code fragment is created as a physical element
+   *                   (see {@link PsiElement#isPhysical()}).
+   * @param flags      types allowed to present in text.
+   * @return the created code fragment.
+   */
+  @NotNull 
+  public abstract PsiTypeCodeFragment createTypeCodeFragment(@NotNull String text, PsiElement context, boolean isPhysical, int flags);
+  
+  /**
+   * Creates a Java reference code fragment from the text of a Java reference to a
+   * package or class.
+   *
+   * @param text              the text of the reference to create.
+   * @param context           the context for resolving the reference.
+   * @param isPhysical        whether the code fragment is created as a physical element
+   *                          (see {@link PsiElement#isPhysical()}).
+   * @param isClassesAccepted if true then classes as well as packages are accepted as
+   *                          reference target, otherwise only packages are
+   * @return the created reference fragment.
+   */
+  @NotNull
+  public abstract PsiJavaCodeReferenceCodeFragment createReferenceCodeFragment(@NotNull String text,
+                                                                               PsiElement context,
+                                                                               boolean isPhysical,
+                                                                               boolean isClassesAccepted);
+
+}