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/*******************************************************************************
* Copyright (c) 2000, 2005 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.ui.externaltools.internal.variables;
import java.text.MessageFormat;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.variables.IDynamicVariable;
import org.eclipse.core.variables.IDynamicVariableResolver;
import org.eclipse.ui.externaltools.internal.model.ExternalToolBuilder;
import org.eclipse.ui.externaltools.internal.model.IExternalToolConstants;
public class BuildProjectResolver implements IDynamicVariableResolver {
/* (non-Javadoc)
* @see org.eclipse.core.variables.IDynamicVariableResolver#resolveValue(org.eclipse.core.variables.IDynamicVariable, java.lang.String)
*/
public String resolveValue(IDynamicVariable variable, String argument) throws CoreException {
IResource resource= ExternalToolBuilder.getBuildProject();
if (argument != null && resource != null) {
resource = ((IProject)resource).findMember(new Path(argument));
}
if (resource != null && resource.exists()) {
return resource.getLocation().toOSString();
}
abort(MessageFormat.format(VariableMessages.BuildProjectResolver_3, new String[]{getReferenceExpression(variable, argument)}), null);
return null;
}
/**
* Throws an exception with the given message and underlying exception.
*
* @param message exception message
* @param exception underlying exception or <code>null</code>
* @throws CoreException
*/
protected void abort(String message, Throwable exception) throws CoreException {
throw new CoreException(new Status(IStatus.ERROR, IExternalToolConstants.PLUGIN_ID, IExternalToolConstants.ERR_INTERNAL_ERROR, message, exception));
}
/**
* Returns an expression used to reference the given variable and optional argument.
* For example, <code>${var_name:arg}</code>.
*
* @param variable referenced variable
* @param argument referenced argument or <code>null</code>
* @return vraiable reference expression
*/
protected String getReferenceExpression(IDynamicVariable variable, String argument) {
StringBuffer reference = new StringBuffer();
reference.append("${"); //$NON-NLS-1$
reference.append(variable.getName());
if (argument != null) {
reference.append(":"); //$NON-NLS-1$
reference.append(argument);
}
reference.append("}"); //$NON-NLS-1$
return reference.toString();
}
}
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