com.liferay.portal.kernel.io.unsync.UnsyncStringWriter.java Source code

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Here is the source code for com.liferay.portal.kernel.io.unsync.UnsyncStringWriter.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.io.unsync;

import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.util.StringBundler;

import java.io.Writer;

/**
 * <p>
 * See https://issues.liferay.com/browse/LPS-6648.
 * </p>
 *
 * @author Shuyang Zhou
 */
public class UnsyncStringWriter extends Writer {

    public UnsyncStringWriter() {
        this(true);
    }

    public UnsyncStringWriter(boolean useStringBundler) {
        if (useStringBundler) {
            stringBundler = new StringBundler();
        } else {
            stringBuilder = new StringBuilder();
        }
    }

    public UnsyncStringWriter(boolean useStringBundler, int initialCapacity) {
        if (useStringBundler) {
            stringBundler = new StringBundler(initialCapacity);
        } else {
            stringBuilder = new StringBuilder(initialCapacity);
        }
    }

    public UnsyncStringWriter(int initialCapacity) {
        this(true, initialCapacity);
    }

    @Override
    public UnsyncStringWriter append(char c) {
        write(c);

        return this;
    }

    @Override
    public UnsyncStringWriter append(CharSequence charSequence) {
        if (charSequence == null) {
            write(StringPool.NULL);
        } else {
            write(charSequence.toString());
        }

        return this;
    }

    @Override
    public UnsyncStringWriter append(CharSequence charSequence, int start, int end) {

        if (charSequence == null) {
            charSequence = StringPool.NULL;
        }

        charSequence = charSequence.subSequence(start, end);

        write(charSequence.toString());

        return this;
    }

    @Override
    public void close() {
    }

    @Override
    public void flush() {
    }

    public StringBuilder getStringBuilder() {
        return stringBuilder;
    }

    public StringBundler getStringBundler() {
        return stringBundler;
    }

    public void reset() {
        if (stringBundler != null) {
            stringBundler.setIndex(0);
        } else {
            stringBuilder.setLength(0);
        }
    }

    @Override
    public String toString() {
        if (stringBundler != null) {
            return stringBundler.toString();
        }

        return stringBuilder.toString();
    }

    @Override
    public void write(char[] chars) {
        write(chars, 0, chars.length);
    }

    @Override
    public void write(char[] chars, int offset, int length) {
        if (length <= 0) {
            return;
        }

        if (stringBundler != null) {
            stringBundler.append(new String(chars, offset, length));
        } else {
            stringBuilder.append(chars, offset, length);
        }
    }

    @Override
    public void write(int c) {
        if (stringBundler != null) {
            char ch = (char) c;

            if (ch <= 127) {
                stringBundler.append(StringPool.ASCII_TABLE[ch]);
            } else {
                stringBundler.append(String.valueOf(ch));
            }
        } else {
            stringBuilder.append((char) c);
        }
    }

    @Override
    public void write(String string) {
        if (stringBundler != null) {
            stringBundler.append(string);
        } else {
            stringBuilder.append(string);
        }
    }

    @Override
    public void write(String string, int offset, int length) {
        if ((string == null) || ((offset == 0) && (length == string.length()))) {

            write(string);
        } else if (stringBundler != null) {
            stringBundler.append(string.substring(offset, offset + length));
        } else {
            stringBuilder.append(string.substring(offset, offset + length));
        }
    }

    protected StringBuilder stringBuilder;
    protected StringBundler stringBundler;

}