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/*******************************************************************************
* Copyright (c) 2005, 2007 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.equinox.internal.p2.engine;
import java.util.*;
import org.eclipse.core.runtime.Assert;
import org.eclipse.equinox.p2.engine.*;
public class InstructionParser {
Phase phase;
Touchpoint touchpoint;
public InstructionParser(Phase phase, Touchpoint touchpoint) {
Assert.isNotNull(phase);
Assert.isNotNull(touchpoint);
this.phase = phase;
this.touchpoint = touchpoint;
}
public ProvisioningAction[] parseActions(String instruction) {
List actions = new ArrayList();
StringTokenizer tokenizer = new StringTokenizer(instruction, ";"); //$NON-NLS-1$
while (tokenizer.hasMoreTokens()) {
actions.add(parseAction(tokenizer.nextToken()));
}
return (ProvisioningAction[]) actions.toArray(new ProvisioningAction[actions.size()]);
}
private ProvisioningAction parseAction(String statement) {
int openBracket = statement.indexOf('(');
int closeBracket = statement.lastIndexOf(')');
String actionName = statement.substring(0, openBracket).trim();
ProvisioningAction action = lookupAction(actionName);
String nameValuePairs = statement.substring(openBracket + 1, closeBracket);
StringTokenizer tokenizer = new StringTokenizer(nameValuePairs, ","); //$NON-NLS-1$
Map parameters = new HashMap();
while (tokenizer.hasMoreTokens()) {
String nameValuePair = tokenizer.nextToken();
int colonIndex = nameValuePair.indexOf(":"); //$NON-NLS-1$
String name = nameValuePair.substring(0, colonIndex).trim();
String value = nameValuePair.substring(colonIndex + 1).trim();
parameters.put(name, value);
}
return new ParameterizedProvisioningAction(action, parameters);
}
private ProvisioningAction lookupAction(String actionId) {
ProvisioningAction action = phase.getAction(actionId);
if (action == null)
action = touchpoint.getAction(actionId);
if (action == null)
throw new IllegalArgumentException("No action found for " + actionId + '.'); //$NON-NLS-1$
return action;
}
}
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