/*
 * 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 org.apache.jackrabbit.vault.fs.api;

import java.io.PrintWriter;
import java.util.LinkedList;
import java.util.Locale;

/**
 * {@code DumpHandler}...
 *
 */
public class DumpContext {

    private final PrintWriter out;

    private LinkedList<String> stack = new LinkedList<String>();

    public DumpContext(PrintWriter out) {
        this.out = out;
        stack.add("");
    }

    public void println(String str) {
        out.println(str);
    }

    public void println(boolean isLast, String str) {
        out.print(stack.getLast());
        out.print(isLast ? "`-- " : "|-- ");
        out.println(str);
    }

    public void printf(boolean isLast, String format, Object... args) {
        println(isLast, String.format(Locale.ENGLISH, format, args));
    }

    public void indent(boolean isLast) {
        String ind = stack.getLast() + (isLast ? "    " : "|   ");
        stack.addLast(ind);
    }

    public void outdent() {
        stack.removeLast();
    }

    public void flush() {
        out.flush();
    }
}
