svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.file / org.gvsig.fmap.dal.file.lib / src / main / java / org / gvsig / fmap / dal / store / simplereader / virtualrows / LimitedReader.java @ 47655
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/*
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* To change this license header, choose License Headers in Project Properties.
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* To change this template file, choose Tools | Templates
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* and open the template in the editor.
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*/
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package org.gvsig.fmap.dal.store.simplereader.virtualrows; |
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import java.io.IOException; |
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import java.io.Reader; |
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/**
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*
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* @author jjdelcerro
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*/
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public class LimitedReader extends Reader { |
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private final Reader delegated; |
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private final int limit; |
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private int count; |
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public LimitedReader(Reader reader, int limit) { |
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this.delegated = reader;
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this.limit = limit;
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} |
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@Override
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public int read(char[] cbuf, int off, int len) throws IOException { |
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if (count >= limit) {
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return -1; |
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} |
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if (count + len > limit) {
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len = limit - count; |
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} |
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if (len == 0) { |
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return -1; |
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} |
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int n = this.delegated.read(cbuf, off, len); |
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if (count + n <= limit) {
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count += n; |
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return n;
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} |
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return limit - count;
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} |
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@Override
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public void close() throws IOException { |
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// this.delegated.close();
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} |
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@Override
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public int read(java.nio.CharBuffer target) throws IOException { |
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return this.delegated.read(target); |
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} |
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@Override
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public int read() throws IOException { |
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return this.delegated.read(); |
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} |
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@Override
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public int read(char[] cbuf) throws IOException { |
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return this.delegated.read(cbuf); |
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} |
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@Override
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public long skip(long n) throws IOException { |
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return this.delegated.skip(n); |
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} |
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@Override
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public boolean ready() throws IOException { |
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return this.delegated.ready(); |
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} |
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@Override
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public boolean markSupported() { |
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return this.delegated.markSupported(); |
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} |
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@Override
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public void mark(int readAheadLimit) throws IOException { |
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this.delegated.mark(readAheadLimit);
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} |
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@Override
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public void reset() throws IOException { |
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this.delegated.reset();
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} |
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} |