BuildProjectResolver


1   /*******************************************************************************
2    * Copyright (c) 2000, 2006 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.ui.externaltools.internal.variables;
12  
13  import org.eclipse.core.resources.IProject;
14  import org.eclipse.core.resources.IResource;
15  import org.eclipse.core.runtime.CoreException;
16  import org.eclipse.core.runtime.IStatus;
17  import org.eclipse.core.runtime.Path;
18  import org.eclipse.core.runtime.Status;
19  import org.eclipse.core.variables.IDynamicVariable;
20  import org.eclipse.core.variables.IDynamicVariableResolver;
21  import org.eclipse.osgi.util.NLS;
22  import org.eclipse.ui.externaltools.internal.model.ExternalToolBuilder;
23  import org.eclipse.ui.externaltools.internal.model.IExternalToolConstants;
24  
25  
26  public class BuildProjectResolver implements IDynamicVariableResolver {
27  
28      /* (non-Javadoc)
29       * @see org.eclipse.core.variables.IDynamicVariableResolver#resolveValue(org.eclipse.core.variables.IDynamicVariable, java.lang.String)
30       */
31      public String   resolveValue(IDynamicVariable variable, String   argument) throws CoreException {
32          IResource resource= ExternalToolBuilder.getBuildProject();
33          if (argument != null && resource != null) {
34              resource = ((IProject)resource).findMember(new Path(argument));
35          }
36          if (resource != null && resource.exists()) {
37              return resource.getLocation().toOSString();
38          }
39          abort(NLS.bind(VariableMessages.BuildProjectResolver_3, new String  []{getReferenceExpression(variable, argument)}), null);
40          return null;
41      }
42      
43      /**
44       * Throws an exception with the given message and underlying exception.
45       *  
46       * @param message exception message
47       * @param exception underlying exception or <code>null</code> 
48       * @throws CoreException
49       */
50      protected void abort(String   message, Throwable   exception) throws CoreException {
51          throw new CoreException(new Status(IStatus.ERROR, IExternalToolConstants.PLUGIN_ID, IExternalToolConstants.ERR_INTERNAL_ERROR, message, exception));
52      }
53      
54      /**
55       * Returns an expression used to reference the given variable and optional argument.
56       * For example, <code>${var_name:arg}</code>.
57       * 
58       * @param variable referenced variable
59       * @param argument referenced argument or <code>null</code>
60       * @return vraiable reference expression
61       */
62      protected String   getReferenceExpression(IDynamicVariable variable, String   argument) {
63          StringBuffer   reference = new StringBuffer  ();
64          reference.append("${"); //$NON-NLS-1$
65          reference.append(variable.getName());
66          if (argument != null) {
67              reference.append(":"); //$NON-NLS-1$
68              reference.append(argument);
69          }
70          reference.append("}"); //$NON-NLS-1$
71          return reference.toString();
72      }
73  }
74
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags