Line.java

/*
 * 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.openejb.table;

import org.apache.openejb.util.JavaSecurityManagers;

import java.io.PrintStream;

public class Line {
    public static final String COL_SEP = "|";
    public static final String HEADER_CHAR = "=";
    public static final String LINE_CHAR = "-";
    public static final char EMPTY_CHAR = ' ';

    private final String[] columns;
    private String cr = JavaSecurityManagers.getSystemProperty("line.separator");

    public Line(final String... columns) {
        this.columns = columns;
    }

    public String[] getColumns() {
        return columns;
    }

    public void print(final int[] max, final PrintStream out) {
        print(max, out, false);
    }

    public void print(final int[] max, final PrintStream out, final boolean header) {
        final StringBuilder sb = new StringBuilder("");
        for (int i = 0; i < max.length; i++) {
            sb.append(EMPTY_CHAR);
            final int spaces = max[i] - columns[i].length();
            for (int k = 0; k < spaces / 2; k++) {
                sb.append(EMPTY_CHAR);
            }
            sb.append(columns[i]);
            for (int k = 0; k < spaces - spaces / 2; k++) {
                sb.append(EMPTY_CHAR);
            }
            sb.append(EMPTY_CHAR).append(COL_SEP);
        }

        final String lineStr = sb.toString();

        final StringBuilder sep = new StringBuilder("");
        final String s;
        if (header) {
            s = HEADER_CHAR;
        } else {
            s = LINE_CHAR;
        }
        for (int i = 0; i < lineStr.length(); i++) {
            sep.append(s);
        }

        if (header) {
            printLine(out, sep.toString());
        }

        printLine(out, lineStr);
        printLine(out, sep.toString());
    }

    private void printLine(final PrintStream out, final String s) {
        out.print(s + cr);
    }

    public void setCr(final String cr) {
        this.cr = cr;
    }
}