001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU General
007: * Public License Version 2 only ("GPL") or the Common Development and Distribution
008: * License("CDDL") (collectively, the "License"). You may not use this file except in
009: * compliance with the License. You can obtain a copy of the License at
010: * http://www.netbeans.org/cddl-gplv2.html or nbbuild/licenses/CDDL-GPL-2-CP. See the
011: * License for the specific language governing permissions and limitations under the
012: * License. When distributing the software, include this License Header Notice in
013: * each file and include the License file at nbbuild/licenses/CDDL-GPL-2-CP. Sun
014: * designates this particular file as subject to the "Classpath" exception as
015: * provided by Sun in the GPL Version 2 section of the License file that
016: * accompanied this code. If applicable, add the following below the License Header,
017: * with the fields enclosed by brackets [] replaced by your own identifying
018: * information: "Portions Copyrighted [year] [name of copyright owner]"
019: *
020: * Contributor(s):
021: *
022: * The Original Software is NetBeans. The Initial Developer of the Original Software
023: * is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun Microsystems, Inc. All
024: * Rights Reserved.
025: *
026: * If you wish your version of this file to be governed by only the CDDL or only the
027: * GPL Version 2, indicate your decision by adding "[Contributor] elects to include
028: * this software in this distribution under the [CDDL or GPL Version 2] license." If
029: * you do not indicate a single choice of license, a recipient has the option to
030: * distribute your version of this file under either the CDDL, the GPL Version 2 or
031: * to extend the choice of license to its licensees as provided above. However, if
032: * you add GPL Version 2 code and therefore, elected the GPL Version 2 license, then
033: * the option applies only if the new code is made subject to such option by the
034: * copyright holder.
035: */
036:
037: package org.netbeans.installer.infra.utils.comment.handlers;
038:
039: import org.netbeans.installer.infra.utils.comment.utils.Utils;
040: import java.io.File;
041: import java.util.regex.Matcher;
042: import java.util.regex.Pattern;
043:
044: /**
045: * A {@link FileHandler} implementation capable of handling JSP documents.
046: *
047: * @author Kirill Sorokin
048: */
049: public class JspFileHandler extends BlockFileHandler {
050: /////////////////////////////////////////////////////////////////////////////////
051: // Instance
052: /**
053: * Creates a new instance of {@link JspFileHandler}. The constuctor
054: * simply falls back to the
055: * {@link BlockFileHandler#BlockFileHandler(Pattern, String, String, String)}
056: * passing in the parameters relevant to JSP files.
057: */
058: public JspFileHandler() {
059: super (COMMENT_PATTERN, COMMENT_START, COMMENT_PREFIX,
060: COMMENT_END);
061: }
062:
063: /**
064: * {@inheritDoc}
065: */
066: public boolean accept(final File file) {
067: if (file == null) {
068: throw new IllegalArgumentException(
069: "The 'file' parameter cannot be null."); // NOI18N
070: }
071:
072: if (!file.isFile()) {
073: return false;
074: }
075:
076: return file.getName().endsWith(".jsp") || // NOI18N
077: file.getName().endsWith(".jspx"); // NOI18N
078: }
079:
080: /**
081: * {@inheritDoc}
082: */
083: @Override
084: public int getCommentPosition() {
085: if (contents == null) {
086: throw new IllegalStateException(
087: "The contents cache has not been intialized."); // NOI18N
088: }
089:
090: final Matcher matcher = COMMENT_POSITION_PATTERN
091: .matcher(contents);
092: if (matcher.find()) {
093: return contents.indexOf(matcher.group(1));
094: } else {
095: return 0;
096: }
097: }
098:
099: /////////////////////////////////////////////////////////////////////////////////
100: // Constants
101: private static final Pattern COMMENT_POSITION_PATTERN = Pattern
102: .compile("\\A\\s*(?:<\\?xml.*?\\?>)?\\s*(.*)", // NOI18N
103: Pattern.MULTILINE | Pattern.DOTALL);
104:
105: /**
106: * The regular expression pattern which matches the initial comment.
107: */
108: private static final Pattern COMMENT_PATTERN = Pattern.compile(
109: "\\A\\s*(?:<\\?xml.*?\\?>)?\\s*(<%--.*?--%>\\s*\\n)", // NOI18N
110: Pattern.MULTILINE | Pattern.DOTALL);
111:
112: /**
113: * The comment opening string.
114: */
115: private static final String COMMENT_START = "<%--" + Utils.NL; // NOI18N
116:
117: /**
118: * The prefix which should be used for each line in the comment.
119: */
120: private static final String COMMENT_PREFIX = " "; // NOI18N
121:
122: /**
123: * The comment closing string.
124: */
125: private static final String COMMENT_END = "--%>" + Utils.NL; // NOI18N
126: }
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