/*
* Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package freemarker.core;
import java.io.IOException;
import java.io.StringReader;
import freemarker.template.SimpleScalar;
import freemarker.template.TemplateException;
import freemarker.template.TemplateExceptionHandler;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateScalarModel;
import freemarker.template.utility.StringUtil;
final class StringLiteral extends Expression implements TemplateScalarModel {
private final String value;
private TemplateElement dynamicValue;
StringLiteral(String value) {
this.value = value;
}
void checkInterpolation() throws ParseException {
if (value.length() > 3 && (value.indexOf("${") >= 0 || value.indexOf("#{") >= 0)) {
SimpleCharStream scs = new SimpleCharStream(new StringReader(value), beginLine, beginColumn+1, value.length());
FMParserTokenManager token_source = new FMParserTokenManager(scs);
token_source.onlyTextOutput = true;
FMParser parser = new FMParser(token_source);
parser.setTemplate(getTemplate());
try {
dynamicValue = parser.FreeMarkerText();
}
catch(ParseException e) {
e.setTemplateName(getTemplate().getName());
throw e;
}
this.constantValue = null;
}
}
TemplateModel _eval(Environment env) throws TemplateException {
return new SimpleScalar(evalAndCoerceToString(env));
}
public String getAsString() {
return value;
}
/**
* Tells if this is something like <tt>"${foo}"</tt>, which is usually a user mistake.
*/
boolean isSingleInterpolationLiteral() {
return dynamicValue != null && dynamicValue.getChildCount() == 1
&& dynamicValue.getChildAt(0) instanceof DollarVariable;
}
String evalAndCoerceToString(Environment env) throws TemplateException {
if (dynamicValue == null) {
return value;
}
else {
TemplateExceptionHandler teh = env.getTemplateExceptionHandler();
env.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
try {
return env.renderElementToString(dynamicValue);
}
catch (IOException ioe) {
throw new _MiscTemplateException(ioe, env);
}
finally {
env.setTemplateExceptionHandler(teh);
}
}
}
public String getCanonicalForm() {
return "\"" + StringUtil.FTLStringLiteralEnc(value) + "\"";
}
String getNodeTypeSymbol() {
return dynamicValue == null ? getCanonicalForm() : "dynamic \"...\"";
}
boolean isLiteral() {
return dynamicValue == null;
}
protected Expression deepCloneWithIdentifierReplaced_inner(
String replacedIdentifier, Expression replacement, ReplacemenetState replacementState) {
StringLiteral cloned = new StringLiteral(value);
// FIXME: replacedIdentifier should be searched inside interpolatedOutput too:
cloned.dynamicValue = this.dynamicValue;
return cloned;
}
int getParameterCount() {
return 1;
}
Object getParameterValue(int idx) {
if (idx != 0) throw new IndexOutOfBoundsException();
return dynamicValue;
}
ParameterRole getParameterRole(int idx) {
if (idx != 0) throw new IndexOutOfBoundsException();
return ParameterRole.EMBEDDED_TEMPLATE;
}
}