com.github.jknack.handlebars.internal.FastStringWriter.java Source code

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Here is the source code for com.github.jknack.handlebars.internal.FastStringWriter.java

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/**
 * Copyright (c) 2012-2015 Edgar Espina
 *
 * This file is part of Handlebars.java.
 *
 * 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.github.jknack.handlebars.internal;

import java.io.IOException;
import java.io.Writer;

import org.apache.commons.lang3.text.StrBuilder;

/**
 * A string writer without locking.
 *
 * @author edgar.espina
 * @since 0.1.0
 */
class FastStringWriter extends Writer {
    /**
     * The internal buffer.
     */
    private StrBuilder buffer = new StrBuilder(Integer.parseInt(System.getProperty("hbs.buffer", "1600")));

    @Override
    public Writer append(final char c) throws IOException {
        buffer.append(c);
        return this;
    }

    @Override
    public Writer append(final CharSequence csq) throws IOException {
        buffer.append(csq);
        return this;
    }

    @Override
    public Writer append(final CharSequence csq, final int start, final int end) throws IOException {
        buffer.append(csq, start, end);
        return this;
    }

    @Override
    public void write(final char[] buffer) throws IOException {
        this.buffer.append(buffer);
    }

    @Override
    public void write(final int c) throws IOException {
        this.buffer.append((char) c);
    }

    @Override
    public void write(final String str) throws IOException {
        this.buffer.append(str);
    }

    @Override
    public void write(final String str, final int off, final int len) throws IOException {
        buffer.append(str, off, len);
    }

    @Override
    public void write(final char[] buffer, final int off, final int len) throws IOException {
        if (off < 0 || off > buffer.length || len < 0 || off + len > buffer.length || off + len < 0) {
            throw new IndexOutOfBoundsException();
        } else if (len == 0) {
            return;
        }
        this.buffer.append(buffer, off, len);
    }

    @Override
    public void flush() throws IOException {
    }

    @Override
    public void close() throws IOException {
        buffer = null;
    }

    @Override
    public String toString() {
        return buffer.toString();
    }

}