svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / string / DecodeFunction.java @ 44009
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1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.string; |
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2 | |||
3 | 44006 | jjdelcerro | import org.apache.commons.codec.binary.Base64; |
4 | import org.apache.commons.codec.binary.Hex; |
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5 | 43512 | jjdelcerro | import org.apache.commons.lang3.Range; |
6 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Interpreter; |
7 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.spi.AbstractFunction; |
8 | |||
9 | 44006 | jjdelcerro | public class DecodeFunction extends AbstractFunction { |
10 | 43512 | jjdelcerro | |
11 | 44006 | jjdelcerro | public DecodeFunction() {
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12 | super(
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13 | "String", "DECODE", Range.is(2), |
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14 | "Decode binary data from textual representation in string.\nSupported formats are: base64, hex.",
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15 | "DECODE({{data}}, 'hex')",
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16 | new String[]{ |
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17 | "data - A string value with the data to be converted",
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18 | "format - A string value indicating the format of the input data. The default value is 'hex'."
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19 | }, |
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20 | "Byte array",
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21 | true
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22 | ); |
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23 | 43512 | jjdelcerro | } |
24 | |||
25 | @Override
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26 | 44009 | jjdelcerro | public boolean allowConstantFolding() { |
27 | return true; |
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28 | } |
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29 | |||
30 | @Override
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31 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
32 | 44006 | jjdelcerro | String data_s = getStr(args,0); |
33 | String type = getStr(args,1); |
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34 | if( "hex".equalsIgnoreCase(type) ) { |
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35 | byte[] data = Hex.decodeHex(data_s.toCharArray()); |
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36 | return data;
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37 | } else if( "base64".equalsIgnoreCase(type) ) { |
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38 | byte[] data = Base64.decodeBase64(data_s); |
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39 | return data;
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40 | } else if( "escape".equalsIgnoreCase(type) ) { |
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41 | // Not supported
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42 | } |
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43 | throw new IllegalArgumentException("Unsupported format type '"+type+"'."); |
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44 | 43512 | jjdelcerro | } |
45 | |||
46 | } |