content: /*******************************************************************************
   * Copyright (c) 2006, 2008 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.wst.jsdt.ui;
  
  import java.util.regex.Pattern;
  
  import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
  import org.eclipse.wst.jsdt.core.IJavaScriptProject;
  import org.eclipse.wst.jsdt.core.JavaScriptModelException;
  import org.eclipse.wst.jsdt.core.dom.JavaScriptUnit;
  import org.eclipse.wst.jsdt.core.dom.rewrite.ImportRewrite;
  
  /**
  *
  * Provisional API: This class/interface is part of an interim API that is still under development and expected to
  * change significantly before reaching stability. It is being made available at this early stage to solicit feedback
  * from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
  * (repeatedly) as the API evolves.
  */
  public class CodeStyleConfiguration {
  	
  	private static final Pattern SEMICOLON_PATTERN= Pattern.compile(";"); //$NON-NLS-1$
  
  	private CodeStyleConfiguration() {
  		// do not instantiate and subclass
  	}
  	
  	
  	/**
  	 * Returns a {@link ImportRewrite} using {@link ImportRewrite#create(IJavaScriptUnit, boolean)} and
  	 * configures the rewriter with the settings as specified in the JDT UI preferences.
  	 * <p>
  	 * 
  	 * @param cu the compilation unit to create the rewriter on
  	 * @param restoreExistingImports specifies if the existing imports should be kept or removed.
  	 * @return the new rewriter configured with the settings as specified in the JDT UI preferences.
  	 * @throws JavaScriptModelException thrown when the compilation unit could not be accessed.
  	 * 
  	 * @see ImportRewrite#create(IJavaScriptUnit, boolean)
  	 */
  	public static ImportRewrite createImportRewrite(IJavaScriptUnit cu, boolean restoreExistingImports) throws JavaScriptModelException {
  		return configureImportRewrite(ImportRewrite.create(cu, restoreExistingImports));
  	}
  	
  	/**
  	 * Returns a {@link ImportRewrite} using {@link ImportRewrite#create(JavaScriptUnit, boolean)} and
  	 * configures the rewriter with the settings as specified in the JDT UI preferences.
  	 * 
  	 * @param astRoot the AST root to create the rewriter on
  	 * @param restoreExistingImports specifies if the existing imports should be kept or removed.
  	 * @return the new rewriter configured with the settings as specified in the JDT UI preferences.
  	 * 
  	 * @see ImportRewrite#create(JavaScriptUnit, boolean)
  	 */
  	public static ImportRewrite createImportRewrite(JavaScriptUnit astRoot, boolean restoreExistingImports) {
  		return configureImportRewrite(ImportRewrite.create(astRoot, restoreExistingImports));
  	}
  	
  	private static ImportRewrite configureImportRewrite(ImportRewrite rewrite) {
  		IJavaScriptProject project= rewrite.getCompilationUnit().getJavaScriptProject();
  		String order= PreferenceConstants.getPreference(PreferenceConstants.ORGIMPORTS_IMPORTORDER, project);
  		rewrite.setImportOrder(SEMICOLON_PATTERN.split(order, 0));
  
  		String thres= PreferenceConstants.getPreference(PreferenceConstants.ORGIMPORTS_ONDEMANDTHRESHOLD, project);
  		try {
  			int num= Integer.parseInt(thres);
  			if (num == 0)
  				num= 1;
  			rewrite.setOnDemandImportThreshold(num);
  		} catch (NumberFormatException e) {
  			// ignore
  		}
  		String thresStatic= PreferenceConstants.getPreference(PreferenceConstants.ORGIMPORTS_STATIC_ONDEMANDTHRESHOLD, project);
  		try {
  			int num= Integer.parseInt(thresStatic);
  			if (num == 0)
  				num= 1;
  			rewrite.setStaticOnDemandImportThreshold(num);
  		} catch (NumberFormatException e) {
  			// ignore
  		}
  		return rewrite;
  	}
  
  
  
  }
  