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 freemarker.template.Template;
056: import freemarker.template.TemplateBooleanModel;
057: import freemarker.template.TemplateException;
058: import freemarker.template.TemplateModel;
059: import freemarker.template.TemplateNumberModel;
060: import freemarker.template.TemplateScalarModel;
061:
062: /**
063: * An instruction that sets a property of the template rendering
064: * environment.
065: */
066: final class PropertySetting extends TemplateElement {
067:
068: private final String key;
069: private final Expression value;
070:
071: PropertySetting(String key, Expression value) {
072: this .key = key;
073: this .value = value;
074: }
075:
076: void setLocation(Template template, int beginColumn, int beginLine,
077: int endColumn, int endLine) throws ParseException {
078: super .setLocation(template, beginColumn, beginLine, endColumn,
079: endLine);
080: if (!key.equals(Configurable.LOCALE_KEY)
081: && !key.equals(Configurable.NUMBER_FORMAT_KEY)
082: && !key.equals(Configurable.TIME_FORMAT_KEY)
083: && !key.equals(Configurable.DATE_FORMAT_KEY)
084: && !key.equals(Configurable.DATETIME_FORMAT_KEY)
085: && !key.equals(Configurable.TIME_ZONE_KEY)
086: && !key.equals(Configurable.BOOLEAN_FORMAT_KEY)
087: && !key.equals(Configurable.CLASSIC_COMPATIBLE_KEY)
088: && !key.equals(Configurable.URL_ESCAPING_CHARSET_KEY)) {
089: throw new ParseException(
090: "Error "
091: + getStartLocation()
092: + "\nInvalid setting name, or it is not allowed to change "
093: + "the value of the setting with FTL: "
094: + key, beginLine, beginColumn);
095: }
096: }
097:
098: void accept(Environment env) throws TemplateException {
099: TemplateModel mval = value.getAsTemplateModel(env);
100: String strval;
101: if (mval instanceof TemplateScalarModel) {
102: strval = ((TemplateScalarModel) mval).getAsString();
103: } else if (mval instanceof TemplateBooleanModel) {
104: strval = ((TemplateBooleanModel) mval).getAsBoolean() ? "true"
105: : "false";
106: } else if (mval instanceof TemplateNumberModel) {
107: strval = ((TemplateNumberModel) mval).getAsNumber()
108: .toString();
109: } else {
110: strval = value.getStringValue(env);
111: }
112: env.setSetting(key, strval);
113: }
114:
115: public String getCanonicalForm() {
116: return "<#setting " + key + "=" + value.getCanonicalForm()
117: + "/>";
118: }
119:
120: public String getDescription() {
121: return "setting " + key + " set to " + "\"" + value + "\" "
122: + "[" + getStartLocation() + "]";
123: }
124: }
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