/*
* 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 freemarker.core.Expression.ReplacemenetState;
import freemarker.template.TemplateException;
/**
* Representation of the compile-time #escape directive.
*/
class EscapeBlock extends TemplateElement {
private final String variable;
private final Expression expr;
private Expression escapedExpr;
EscapeBlock(String variable, Expression expr, Expression escapedExpr) {
this.variable = variable;
this.expr = expr;
this.escapedExpr = escapedExpr;
}
void setContent(TemplateElement nestedBlock) {
this.nestedBlock = nestedBlock;
// We don't need it anymore at this point
this.escapedExpr = null;
}
void accept(Environment env) throws TemplateException, IOException {
if (nestedBlock != null) {
env.visit(nestedBlock);
}
}
Expression doEscape(Expression expression) {
return escapedExpr.deepCloneWithIdentifierReplaced(variable, expression, new ReplacemenetState());
}
protected String dump(boolean canonical) {
StringBuffer sb = new StringBuffer();
if (canonical) sb.append('<');
sb.append(getNodeTypeSymbol()).append(' ').append(variable).append(" as ").append(expr.getCanonicalForm());
if (canonical) {
sb.append('>').append(nestedBlock.getCanonicalForm()).append("</").append(getNodeTypeSymbol()).append('>');
}
return sb.toString();
}
String getNodeTypeSymbol() {
return "#escape";
}
boolean isShownInStackTrace() {
return false;
}
int getParameterCount() {
return 2;
}
Object getParameterValue(int idx) {
switch (idx) {
case 0: return variable;
case 1: return expr;
default: throw new IndexOutOfBoundsException();
}
}
ParameterRole getParameterRole(int idx) {
switch (idx) {
case 0: return ParameterRole.PLACEHOLDER_VARIABLE;
case 1: return ParameterRole.EXPRESSION_TEMPLATE;
default: throw new IndexOutOfBoundsException();
}
}
}