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/*
 * Copyright 2021 EPAM Systems, Inc
 *
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership. 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 com.epam.deltix.util.collections;

import com.epam.deltix.gflog.api.Log;
import com.epam.deltix.gflog.api.LogFactory;
import com.epam.deltix.util.lang.Util;
import java.io.IOException;


/**
 *
 */
public class PrintVisitor implements Visitor  {
    private static final Log LOG = LogFactory.getLog(PrintVisitor.class);
    private final Appendable            out;
    private final String                prefix;
    private final String                postfix;
    
    public PrintVisitor (Appendable out) {
        this (out, "", "\n");
    }

    public PrintVisitor (Appendable out, String prefix, String postfix) {
        this.out = out;
        this.prefix = prefix;
        this.postfix = postfix;
    }
    
    @Override
    public boolean                  visit (Object object) {
        try {
            out.append (prefix);
            out.append (object == null ? "null" : object.toString ());
            out.append (postfix);
            return (true);
        } catch (IOException iox) {
            LOG.error ("Error printing %s").with(iox);
            return (false);
        }
    }        
}