/*******************************************************************************
* Copyright (c) 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.bpel.common.ui;
import java.util.StringTokenizer;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.Platform;
/**
* Utility class.
*/
public final class Utils {
/**
* Given an extension point name returns its configuration elements.
*/
public static IConfigurationElement[] getConfigurationElements(String extensionPointId) {
IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(CommonUIPlugin.PLUGIN_ID, extensionPointId);
if (extensionPoint == null) {
return null;
}
return extensionPoint.getConfigurationElements();
}
/**
* Stuff for manipulating generated code
*
* The format for generated code is:
//@generated:id
// <generator
// source (model)
// goes
// here>
//@generated:end
<generated java code here>
*/
/**
* additional tags we need for the model serialization to be stored as Java comments
*/
public static final String GEN_TAG = "//@generated:"; //$NON-NLS-1$
/*
* Note: GEN_TAG_MID assumed to be substring of the other GEN_TAG's in code below, don't change it without adjusting the logic
* Also, adjust the similar code in the embedded editor if any.
*/
public static final String GEN_TAG_MID = "//"; //$NON-NLS-1$
public static final String GEN_TAG_END = "//@generated:end"; //$NON-NLS-1$
public static final String EMBEDDED_SMAP_PREFIX = "//!SMAP!"; //$NON-NLS-1$
/**
* Utility function that strips out the generated comments for the generated Java code with embedded model.
* @param string - pass the entire block of Java code that is generated from the embedded's getCode function
* @return - returns the Java code with the embedded code subtracted out
*/
public static String getGeneratedCode(String string) {
StringBuffer sb = new StringBuffer();
StringTokenizer stringTokenizer = new StringTokenizer(string, "\n"); //$NON-NLS-1$
boolean inside = false;
while (stringTokenizer.hasMoreTokens()) {
String s = stringTokenizer.nextToken();
if (s.startsWith(GEN_TAG_MID) && !(s.startsWith(EMBEDDED_SMAP_PREFIX))) {
// test for end first since GEN_TAG is a prefix of GEN_TAG_END
if (inside && s.startsWith(GEN_TAG_END)) {
inside = false;
continue;
}
if (s.startsWith(GEN_TAG)) {
inside = true;
continue; // with next line
}
} else if (!s.startsWith(EMBEDDED_SMAP_PREFIX)){
// it's not a commented line, so just regular Java code
sb.append(s);
sb.append("\n");
continue;
}
if (!inside && !(s.startsWith(EMBEDDED_SMAP_PREFIX))) {
sb.append(s);
sb.append("\n");
}
}
return sb.toString();
}
/**
* Utility function that returns the id of the generator for the given generated Java code.
* Returns <code>null</code> if no generator id is found
* @param string - pass the entire block of Java code that is generated
* @return - returns the Java code with the generated comment code subtracted out
*/
public static String getGeneratorId(String string) {
if (string != null) {
StringTokenizer stringTokenizer = new StringTokenizer(string, "\n"); //$NON-NLS-1$
while (stringTokenizer.hasMoreTokens()) {
String s = stringTokenizer.nextToken();
if (s.startsWith(GEN_TAG_MID)) {
if (s.startsWith(GEN_TAG)) {
return s.substring(GEN_TAG.length());
}
}
}
}
return null;
}
}