case-study/jdt-before/core extension/org/eclipse/jdt/internal/corext/template/java/LinkResolver.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2011 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package org.eclipse.jdt.internal.corext.template.java;
  12
  13 import java.util.Iterator;
  14 import java.util.List;
  15
  16 import org.eclipse.jface.text.templates.TemplateContext;
  17 import org.eclipse.jface.text.templates.TemplateVariable;
  18 import org.eclipse.jface.text.templates.TemplateVariableResolver;
  19
  20 /**
  21  * Resolver for the <code>link</code> variable. Resolves to a
  22  * first parameter puts the value into linked mode. Shows proposals
  23  * for each parameter.
  24  *
  25  * @since 3.4
  26  */
  27 public class LinkResolver extends TemplateVariableResolver {
  28
  29         private String[] fProposals;
  30
  31         public LinkResolver(String type, String description) {
  32                 super(type, description);
  33         }
  34
  35         /**
  36          * Default ctor for instantiation by the extension point.
  37          */
  38         public LinkResolver() {
  39         }
  40
  41         /* (non-Javadoc)
  42          * @see org.eclipse.jface.text.templates.TemplateVariableResolver#resolve(org.eclipse.jface.text.templates.TemplateVariable, org.eclipse.jface.text.templates.TemplateContext)
  43          */
  44         @Override
  45         public void resolve(TemplateVariable variable, TemplateContext context) {
  46
  47                 variable.setUnambiguous(false);
  48
  49                 if (variable instanceof JavaVariable) {
  50                         JavaContext jc= (JavaContext) context;
  51                         JavaVariable jv= (JavaVariable) variable;
  52
  53                         List<String> params= variable.getVariableType().getParams();
  54                         if (params.size() > 0) {
  55                                 fProposals= new String[params.size()];
  56                                 int i= 0;
  57                                 for (Iterator<String> iterator= params.iterator(); iterator.hasNext();) {
  58                                         String param= iterator.next();
  59                                         fProposals[i]= param;
  60                                         i++;
  61                                 }
  62                                 jv.setChoices(fProposals);
  63                                 jv.setCurrentChoice(fProposals[0]);
  64
  65                                 jc.markAsUsed(jv.getDefaultValue());
  66                         } else {
  67                                 fProposals= new String[] { variable.getDefaultValue() };
  68                                 super.resolve(variable, context);
  69                                 return;
  70                         }
  71                 } else
  72                         super.resolve(variable, context);
  73         }
  74
  75         /* (non-Javadoc)
  76          * @see org.eclipse.jface.text.templates.TemplateVariableResolver#resolveAll(org.eclipse.jface.text.templates.TemplateContext)
  77          */
  78         @Override
  79         protected String[] resolveAll(TemplateContext context) {
  80                 return fProposals;
  81         }
  82 }