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Groovy: A powerful, dynamic language for the JVM
/*
* Copyright 2003-2014 the original author or authors.
*
* 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.
*
* Derived from Boon all rights granted to Groovy project for this fork.
*/
package groovy.json.internal;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
/**
* @author Rick Hightower
*/
public class IO {
private static final int EOF = -1;
private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
public static CharBuf read(Reader input, CharBuf charBuf, final int bufSize) {
if (charBuf == null) {
charBuf = CharBuf.create(bufSize);
} else {
charBuf.readForRecycle();
}
try {
char[] buffer = charBuf.toCharArray();
int size = input.read(buffer);
if (size != -1) {
charBuf._len(size);
}
if (size < buffer.length) {
return charBuf;
}
copy(input, charBuf);
} catch (IOException e) {
Exceptions.handle(e);
} finally {
try {
input.close();
} catch (IOException e) {
Exceptions.handle(e);
}
}
return charBuf;
}
public static int copy(Reader input, Writer output) {
long count = copyLarge(input, output);
if (count > Integer.MAX_VALUE) {
return -1;
}
return (int) count;
}
public static long copyLarge(Reader reader, Writer writer) {
return copyLarge(reader, writer, new char[DEFAULT_BUFFER_SIZE]);
}
public static long copyLarge(Reader reader, Writer writer, char[] buffer) {
long count = 0;
int n;
try {
while (EOF != (n = reader.read(buffer))) {
writer.write(buffer, 0, n);
count += n;
}
} catch (IOException e) {
Exceptions.handle(e);
}
return count;
}
}