diff options
Diffstat (limited to 'bundles/org.eclipse.team.cvs.core/src/org/eclipse/team/internal/ccvs/core/client/listeners/ServerMessageLineMatcher.java')
-rw-r--r-- | bundles/org.eclipse.team.cvs.core/src/org/eclipse/team/internal/ccvs/core/client/listeners/ServerMessageLineMatcher.java | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/bundles/org.eclipse.team.cvs.core/src/org/eclipse/team/internal/ccvs/core/client/listeners/ServerMessageLineMatcher.java b/bundles/org.eclipse.team.cvs.core/src/org/eclipse/team/internal/ccvs/core/client/listeners/ServerMessageLineMatcher.java new file mode 100644 index 000000000..3e42ee1a6 --- /dev/null +++ b/bundles/org.eclipse.team.cvs.core/src/org/eclipse/team/internal/ccvs/core/client/listeners/ServerMessageLineMatcher.java @@ -0,0 +1,99 @@ +/******************************************************************************* + * Copyright (c) 2000, 2003 IBM Corporation and others. + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Common Public License v1.0 + * which accompanies this distribution, and is available at + * http://www.eclipse.org/legal/cpl-v10.html + * + * Contributors: + * IBM Corporation - initial API and implementation + *******************************************************************************/ +package org.eclipse.team.internal.ccvs.core.client.listeners; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.regex.Matcher; +import java.util.regex.Pattern; + +import org.eclipse.team.internal.ccvs.core.CVSException; +import org.eclipse.team.internal.ccvs.core.util.Assert; +import org.eclipse.team.internal.ccvs.core.Policy; + +/** + * This class extracts matches server lines to expected patterns and extracts + * required information from the line. + */ +public class ServerMessageLineMatcher { + + protected static final Pattern VARIABLE_MATCHING_PATTERN = Pattern.compile("(\\((\\w*):.*:\\2\\))"); //$NON-NLS-1$ + + Pattern pattern; + String[] variables; + + public ServerMessageLineMatcher(String template, String[] expectedVariables) throws CVSException { + // Extract the variable names from the template + Matcher matcher = VARIABLE_MATCHING_PATTERN.matcher(template); + List variables = new ArrayList(); + while (matcher.find()) { + if (matcher.groupCount() != 2) { + throw new CVSException(Policy.bind("ServerMessageLineMatcher.5", template)); //$NON-NLS-1$ + } + variables.add(matcher.group(2)); + } + ensureMatches(template, variables, expectedVariables); + this.variables = (String[]) variables.toArray(new String[variables.size()]); + + // Modify the template so it can be used to match message lines from the server + // (i.e. remove the variable markup) + for (Iterator iter = variables.iterator(); iter.hasNext();) { + String element = (String) iter.next(); + template = template.replaceAll(element + ":", ""); //$NON-NLS-1$ //$NON-NLS-2$ + template = template.replaceAll(":" + element, ""); //$NON-NLS-1$ //$NON-NLS-2$ + } + + // Ensure that the number of groups in the pattern match the number of variables + int count = 0; + int start = -1; + while ((start = template.indexOf('(', start + 1)) != -1) { + count++; + } + if (count != variables.size()) { + throw new CVSException(Policy.bind("ServerMessageLineMatcher.6", template)); //$NON-NLS-1$ + } + + // Create the pattern fir matching lines from the server + this.pattern = Pattern.compile(template); + } + + /* + * Throw an exception if the found variables do not match the expected variables + */ + private void ensureMatches(String template, List variables, String[] expectedVariables) throws CVSException { + for (int i = 0; i < expectedVariables.length; i++) { + String expected = expectedVariables[i]; + if (!variables.contains(expected)) { + throw new CVSException(Policy.bind("ServerMessageLineMatcher.7", expected, template)); //$NON-NLS-1$ + } + } + } + + public Map processServerMessage(String line) { + Matcher matcher = pattern.matcher(line); + if (!matcher.find()) return null; + Assert.isTrue(matcher.groupCount() == variables.length); + Map result = new HashMap(); + for (int i = 1; i <= matcher.groupCount(); i++) { + result.put(variables[i - 1], matcher.group(i)); + } + return result; + } + + public boolean matches(String line) { + Matcher matcher = pattern.matcher(line); + return (matcher.find()); + } + +} |