| /******************************************************************************* |
| * Copyright (c) 2003, 2011 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.server.ui.internal.editor; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.StringTokenizer; |
| |
| import org.eclipse.core.expressions.*; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.wst.server.core.IServerWorkingCopy; |
| import org.eclipse.wst.server.ui.internal.Trace; |
| import org.eclipse.ui.IEditorPart; |
| /** |
| * |
| */ |
| public class ServerEditorPartFactory implements IServerEditorPartFactory { |
| private IConfigurationElement element; |
| private Expression fContextualLaunchExpr = null; |
| |
| /** |
| * ServerEditorPartFactory constructor. |
| * |
| * @param element a configuration element |
| */ |
| public ServerEditorPartFactory(IConfigurationElement element) { |
| super(); |
| this.element = element; |
| } |
| |
| /** |
| * |
| */ |
| protected IConfigurationElement getConfigurationElement() { |
| return element; |
| } |
| |
| /** |
| * Returns the id of this part factory. |
| * |
| * @return java.lang.String |
| */ |
| public String getId() { |
| return element.getAttribute("id"); |
| } |
| |
| /** |
| * Returns the name of this part factory. |
| * |
| * @return java.lang.String |
| */ |
| public String getName() { |
| return element.getAttribute("name"); |
| } |
| |
| protected String[] getInsertionIds() { |
| try { |
| String insertionIds = element.getAttribute("insertionIds"); |
| List<String> list = new ArrayList<String>(); |
| if (insertionIds != null && insertionIds.length() > 0) { |
| StringTokenizer st = new StringTokenizer(insertionIds, ","); |
| while (st.hasMoreTokens()) { |
| String str = st.nextToken(); |
| if (str != null && str.length() > 0) |
| list.add(str.trim()); |
| } |
| } |
| String[] s = new String[list.size()]; |
| list.toArray(s); |
| return s; |
| } catch (Exception e) { |
| //Trace.trace("Could not get server resource from: " + element.getAttribute("serverResources")); |
| return null; |
| } |
| } |
| |
| /** |
| * @see IServerEditorPartFactory#supportsInsertionId(String) |
| */ |
| public boolean supportsInsertionId(String id) { |
| if (id == null || id.length() == 0) |
| return false; |
| |
| String[] s = getInsertionIds(); |
| if (s == null) |
| return false; |
| |
| int size = s.length; |
| for (int i = 0; i < size; i++) { |
| if (s[i].endsWith("*")) { |
| if (id.length() >= s[i].length() && id.startsWith(s[i].substring(0, s[i].length() - 1))) |
| return true; |
| } else if (id.equals(s[i])) |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Returns the order. |
| * |
| * @return int |
| */ |
| public int getOrder() { |
| try { |
| String o = element.getAttribute("order"); |
| return Integer.parseInt(o); |
| } catch (NumberFormatException e) { |
| return -1; |
| } |
| } |
| |
| /** |
| * Return the ids of the server and server configuration type ids (specified |
| * using Java-import style) that this page may support. |
| * |
| * @return an array of type ids |
| */ |
| protected String[] getTypeIds() { |
| try { |
| List<String> list = new ArrayList<String>(); |
| StringTokenizer st = new StringTokenizer(element.getAttribute("typeIds"), ","); |
| while (st.hasMoreTokens()) { |
| String str = st.nextToken(); |
| if (str != null && str.length() > 0) |
| list.add(str.trim()); |
| } |
| String[] s = new String[list.size()]; |
| list.toArray(s); |
| return s; |
| } catch (Exception e) { |
| //Trace.trace("Could not get server resource from: " + element.getAttribute("serverResources")); |
| return null; |
| } |
| } |
| |
| /** |
| * @see IServerEditorPartFactory#supportsType(String) |
| */ |
| public boolean supportsType(String id) { |
| String[] s = getTypeIds(); |
| if (s == null || s.length == 0 || "*".equals(s[0])) |
| return true; |
| |
| if (id == null || id.length() == 0) |
| return false; |
| |
| int size = s.length; |
| for (int i = 0; i < size; i++) { |
| if (s[i].endsWith("*")) { |
| if (id.length() >= s[i].length() && id.startsWith(s[i].substring(0, s[i].length() - 1))) |
| return true; |
| } else if (id.equals(s[i])) |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * @see IServerEditorPartFactory#shouldCreatePage(IServerWorkingCopy) |
| */ |
| public boolean shouldCreatePage(IServerWorkingCopy server) { |
| try { |
| return isEnabled(server); |
| } catch (Exception e) { |
| if (Trace.SEVERE) { |
| Trace.trace(Trace.STRING_SEVERE, "Error calling delegate", e); |
| } |
| return false; |
| } |
| } |
| |
| /** |
| * @see IServerEditorPartFactory#createPage() |
| */ |
| public IEditorPart createPage() { |
| try { |
| return (IEditorPart) element.createExecutableExtension("class"); |
| } catch (Exception e) { |
| if (Trace.SEVERE) { |
| Trace.trace(Trace.STRING_SEVERE, "Error calling delegate", e); |
| } |
| return null; |
| } |
| } |
| |
| /** |
| * Returns an expression that represents the enablement logic for the |
| * contextual launch element of this launch shortcut description or |
| * <code>null</code> if none. |
| * @return an evaluatable expression or <code>null</code> |
| * @throws CoreException if the configuration element can't be |
| * converted. Reasons include: (a) no handler is available to |
| * cope with a certain configuration element or (b) the XML |
| * expression tree is malformed. |
| */ |
| public Expression getContextualLaunchEnablementExpression() throws CoreException { |
| if (fContextualLaunchExpr == null) { |
| IConfigurationElement[] elements = element.getChildren(ExpressionTagNames.ENABLEMENT); |
| IConfigurationElement enablement = elements.length > 0 ? elements[0] : null; |
| |
| if (enablement != null) |
| fContextualLaunchExpr = ExpressionConverter.getDefault().perform(enablement); |
| } |
| return fContextualLaunchExpr; |
| } |
| |
| /** |
| * Evaluate the given expression within the given context and return |
| * the result. Returns <code>true</code> iff result is either TRUE or NOT_LOADED. |
| * This allows optimistic inclusion of shortcuts before plugins are loaded. |
| * Returns <code>false</code> if exp is <code>null</code>. |
| * |
| * @param exp the enablement expression to evaluate or <code>null</code> |
| * @param context the context of the evaluation. Usually, the |
| * user's selection. |
| * @return the result of evaluating the expression |
| * @throws CoreException |
| */ |
| protected boolean evalEnablementExpression(IEvaluationContext context, Expression exp) throws CoreException { |
| return (exp != null) ? ((exp.evaluate(context)) != EvaluationResult.FALSE) : false; |
| } |
| |
| /** |
| * Returns true if enabled for the given object. |
| * |
| * @param obj an object |
| * @return <code>true</code> if enabled |
| * @throws CoreException if anything goes wrong |
| */ |
| public boolean isEnabled(Object obj) throws CoreException { |
| if (getContextualLaunchEnablementExpression() == null) |
| return true; |
| IEvaluationContext context = new EvaluationContext(null, obj); |
| context.setAllowPluginActivation(true); |
| context.addVariable("server", obj); |
| return evalEnablementExpression(context, getContextualLaunchEnablementExpression()); |
| } |
| } |