Case Study: adding data and statistics

[ifi-stolz-refaktor.git] / case-study / jdt-before / ui / org / eclipse / jdt / internal / ui / text / java / MemberProposalInfo.java

diff --git a/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/text/java/MemberProposalInfo.java b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/text/java/MemberProposalInfo.java
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+/*******************************************************************************
+ * Copyright (c) 2005, 2011 IBM Corporation 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:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.ui.text.java;
+
+import org.eclipse.core.runtime.Assert;
+
+import org.eclipse.jdt.core.CompletionProposal;
+import org.eclipse.jdt.core.IJavaElement;
+import org.eclipse.jdt.core.IJavaProject;
+import org.eclipse.jdt.core.IMember;
+import org.eclipse.jdt.core.JavaModelException;
+
+/**
+ * Proposal info that computes the javadoc lazily when it is queried.
+ *
+ * @since 3.1
+ */
+public abstract class MemberProposalInfo extends ProposalInfo {
+       /* configuration */
+       protected final IJavaProject fJavaProject;
+       protected final CompletionProposal fProposal;
+
+       /* cache filled lazily */
+       private boolean fJavaElementResolved= false;
+
+       /**
+        * Creates a new proposal info.
+        *
+        * @param project the java project to reference when resolving types
+        * @param proposal the proposal to generate information for
+        */
+       public MemberProposalInfo(IJavaProject project, CompletionProposal proposal) {
+               Assert.isNotNull(project);
+               Assert.isNotNull(proposal);
+               fJavaProject= project;
+               fProposal= proposal;
+       }
+
+       /**
+        * Returns the java element that this computer corresponds to, possibly <code>null</code>.
+        * 
+        * @return the java element that this computer corresponds to, possibly <code>null</code>
+        * @throws JavaModelException if accessing the java model fails
+        */
+       @Override
+       public IJavaElement getJavaElement() throws JavaModelException {
+               if (!fJavaElementResolved) {
+                       fJavaElementResolved= true;
+                       fElement= resolveMember();
+               }
+               return fElement;
+       }
+
+       /**
+        * Resolves the member described by the receiver and returns it if found.
+        * Returns <code>null</code> if no corresponding member can be found.
+        *
+        * @return the resolved member or <code>null</code> if none is found
+        * @throws JavaModelException if accessing the java model fails
+        */
+       protected abstract IMember resolveMember() throws JavaModelException;
+
+
+}