/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.template.TemplateException;

/**
 * An #outputFormat element
 */
final class OutputFormatBlock extends TemplateElement {
    
    private final Expression paramExp;

    OutputFormatBlock(TemplateElements children, Expression paramExp) { 
        this.paramExp = paramExp; 
        setChildren(children);
    }

    @Override
    TemplateElement[] accept(Environment env) throws TemplateException, IOException {
        return getChildBuffer();
    }

    @Override
    protected String dump(boolean canonical) {
        if (canonical) {
            return "<" + getNodeTypeSymbol() + " \"" + paramExp.getCanonicalForm() + "\">"
                    + getChildrenCanonicalForm() + "</" + getNodeTypeSymbol() + ">";
        } else {
            return getNodeTypeSymbol();
        }
    }
    
    @Override
    String getNodeTypeSymbol() {
        return "#outputformat";
    }
    
    @Override
    int getParameterCount() {
        return 1;
    }

    @Override
    Object getParameterValue(int idx) {
        if (idx == 0) return paramExp;
        else
            throw new IndexOutOfBoundsException();
    }

    @Override
    ParameterRole getParameterRole(int idx) {
        if (idx == 0) return ParameterRole.VALUE;
        else
            throw new IndexOutOfBoundsException();
    }

    @Override
    boolean isIgnorable(boolean stripWhitespace) {
        return getChildCount() == 0;
    }

    @Override
    boolean isNestedBlockRepeater() {
        return false;
    }
    
}