001: /*
002: * Copyright (c) 2003 The Visigoth Software Society. All rights
003: * reserved.
004: *
005: * Redistribution and use in source and binary forms, with or without
006: * modification, are permitted provided that the following conditions
007: * are met:
008: *
009: * 1. Redistributions of source code must retain the above copyright
010: * notice, this list of conditions and the following disclaimer.
011: *
012: * 2. Redistributions in binary form must reproduce the above copyright
013: * notice, this list of conditions and the following disclaimer in
014: * the documentation and/or other materials provided with the
015: * distribution.
016: *
017: * 3. The end-user documentation included with the redistribution, if
018: * any, must include the following acknowledgement:
019: * "This product includes software developed by the
020: * Visigoth Software Society (http://www.visigoths.org/)."
021: * Alternately, this acknowledgement may appear in the software itself,
022: * if and wherever such third-party acknowledgements normally appear.
023: *
024: * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
025: * project contributors may be used to endorse or promote products derived
026: * from this software without prior written permission. For written
027: * permission, please contact visigoths@visigoths.org.
028: *
029: * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
030: * nor may "FreeMarker" or "Visigoth" appear in their names
031: * without prior written permission of the Visigoth Software Society.
032: *
033: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
034: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
035: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
036: * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
037: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
038: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
039: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
040: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
041: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
042: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
043: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
044: * SUCH DAMAGE.
045: * ====================================================================
046: *
047: * This software consists of voluntary contributions made by many
048: * individuals on behalf of the Visigoth Software Society. For more
049: * information on the Visigoth Software Society, please see
050: * http://www.visigoths.org/
051: */
052:
053: package freemarker.core;
054:
055: import java.io.IOException;
056:
057: import freemarker.template.Template;
058: import freemarker.template.TemplateException;
059:
060: /**
061: * An instruction that gets another template
062: * and processes it within the current template.
063: */
064: public final class LibraryLoad extends TemplateElement {
065:
066: private Expression templateName;
067: private String namespace;
068: private final String templatePath;
069:
070: /**
071: * @param template the template that this <tt>Include</tt> is a part of.
072: * @param templateName the name of the template to be included.
073: * @param namespace the namespace to assign this library to
074: */
075: LibraryLoad(Template template, Expression templateName,
076: String namespace) {
077: this .namespace = namespace;
078: String templatePath1 = template.getName();
079: int lastSlash = templatePath1.lastIndexOf('/');
080: templatePath = lastSlash == -1 ? "" : templatePath1.substring(
081: 0, lastSlash + 1);
082: this .templateName = templateName;
083: }
084:
085: void accept(Environment env) throws TemplateException, IOException {
086: String templateNameString = templateName.getStringValue(env);
087: if (templateNameString == null) {
088: String msg = "Error " + getStartLocation()
089: + "The expression " + templateName
090: + " is undefined.";
091: throw new InvalidReferenceException(msg, env);
092: }
093: Template importedTemplate;
094: try {
095: if (!env.isClassicCompatible()) {
096: if (templateNameString.indexOf("://") > 0) {
097: ;
098: } else if (templateNameString.length() > 0
099: && templateNameString.charAt(0) == '/') {
100: int protIndex = templatePath.indexOf("://");
101: if (protIndex > 0) {
102: templateNameString = templatePath.substring(0,
103: protIndex + 2)
104: + templateNameString;
105: } else {
106: templateNameString = templateNameString
107: .substring(1);
108: }
109: } else {
110: templateNameString = templatePath
111: + templateNameString;
112: }
113: }
114: importedTemplate = env
115: .getTemplateForImporting(templateNameString);
116: } catch (ParseException pe) {
117: String msg = "Error parsing imported template "
118: + templateNameString;
119: throw new TemplateException(msg, pe, env);
120: } catch (IOException ioe) {
121: String msg = "Error reading imported file "
122: + templateNameString;
123: throw new TemplateException(msg, ioe, env);
124: }
125: env.importLib(importedTemplate, namespace);
126: }
127:
128: public String getCanonicalForm() {
129: StringBuffer buf = new StringBuffer("<#import ");
130: buf.append(templateName);
131: buf.append(" as ");
132: buf.append(namespace);
133: buf.append("/>");
134: return buf.toString();
135: }
136:
137: public String getDescription() {
138: return "import " + templateName + " as " + namespace;
139: }
140:
141: public String getTemplateName() {
142: return templateName.toString();
143: }
144: }
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