| /******************************************************************************* |
| * Copyright (c) 2005, 2017 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Landmark Graphics Corporation - bug 397183 |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.engine; |
| |
| import java.util.*; |
| import java.util.Map.Entry; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.equinox.p2.engine.spi.*; |
| |
| public class ParameterizedProvisioningAction extends ProvisioningAction { |
| private ProvisioningAction action; |
| private Map<String, String> actionParameters; |
| //ActualParameter is used to keep values to which variables have been resolved. |
| //This is especially useful when undoing in the presence of variables that change (e.g. lastResult) |
| private Map<String, Object> actualParameters; |
| private String actionText; |
| |
| public ParameterizedProvisioningAction(ProvisioningAction action, Map<String, String> actionParameters, String actionText) { |
| if (action == null || actionParameters == null) |
| throw new IllegalArgumentException(Messages.ParameterizedProvisioningAction_action_or_parameters_null); |
| this.action = action; |
| this.actionParameters = actionParameters; |
| this.actualParameters = new HashMap<>(actionParameters.size()); |
| this.actionText = actionText; |
| } |
| |
| @Override |
| public IStatus execute(Map<String, Object> parameters) { |
| parameters = processActionParameters(parameters); |
| return action.execute(parameters); |
| } |
| |
| @Override |
| public IStatus undo(Map<String, Object> parameters) { |
| parameters = processActionParameters(parameters); |
| return action.undo(parameters); |
| } |
| |
| private Map<String, Object> processActionParameters(Map<String, Object> parameters) { |
| Map<String, Object> result = new HashMap<>(parameters); |
| for (Entry<String, String> entry : actionParameters.entrySet()) { |
| String name = entry.getKey(); |
| Object value = processVariables(entry.getValue(), parameters, false); |
| result.put(name, value); |
| } |
| return Collections.unmodifiableMap(result); |
| } |
| |
| //allowInfixReplacement triggers the replacement of the variables found in the middle of a string (e.g. abc${var}def) |
| private Object processVariables(String parameterValue, Map<String, Object> parameters, boolean allowInfixReplacement) { |
| int variableBeginIndex = parameterValue.indexOf("${"); //$NON-NLS-1$ |
| if (variableBeginIndex == -1) |
| return parameterValue; |
| |
| int variableEndIndex = parameterValue.indexOf('}', variableBeginIndex + 2); |
| if (variableEndIndex == -1) |
| return parameterValue; |
| |
| String preVariable = parameterValue.substring(0, variableBeginIndex); |
| String variableName = parameterValue.substring(variableBeginIndex + 2, variableEndIndex); |
| |
| //replace the internal name by the user visible name |
| if (Phase.LAST_RESULT_PUBLIC_NAME.equals(variableName)) { |
| variableName = Phase.LAST_RESULT_INTERNAL_NAME; |
| } |
| Object valueUsed = actualParameters.get(variableName); |
| Object value = valueUsed == null ? parameters.get(variableName) : valueUsed; |
| actualParameters.put(variableName, value); |
| |
| if (value instanceof Value) { |
| if (allowInfixReplacement == false && variableBeginIndex == 0 && variableEndIndex == parameterValue.length() - 1) { |
| return ((Value<?>) value).getValue(); |
| } |
| |
| Value<?> result = (Value<?>) value; |
| if (result.getClazz() == String.class) { |
| value = result.getValue(); |
| } else |
| throw new RuntimeException("The type of the variable is expected to be a String"); //$NON-NLS-1$ |
| } |
| |
| // try to replace this parameter with a character |
| if (value == null && variableName.charAt(0) == '#') { |
| try { |
| int code = Integer.parseInt(variableName.substring(1)); |
| if (code >= 0 && code < 65536) |
| value = Character.toString((char) code); |
| } catch (Throwable t) { |
| // ignore and leave value as null |
| } |
| } |
| |
| String variableValue = value == null ? "" : value.toString(); //$NON-NLS-1$ //TODO This is where we replace the values |
| String postVariable = (String) processVariables(parameterValue.substring(variableEndIndex + 1), parameters, true); |
| return preVariable + variableValue + postVariable; |
| } |
| |
| public ProvisioningAction getAction() { |
| return action; |
| } |
| |
| public Map<String, String> getParameters() { |
| return actionParameters; |
| } |
| |
| public String getActionText() { |
| return actionText; |
| } |
| |
| @Override |
| public Touchpoint getTouchpoint() { |
| return action.getTouchpoint(); |
| } |
| |
| @Override |
| public void setTouchpoint(Touchpoint touchpoint) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public Value<?> getResult() { |
| return action.getResult(); |
| } |
| |
| } |