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package org.apache.tapestry.util.io; |
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import org.apache.hivemind.lib.util.StrategyRegistry; |
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import org.apache.hivemind.lib.util.StrategyRegistryImpl; |
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import org.apache.tapestry.Tapestry; |
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import org.apache.tapestry.services.DataSqueezer; |
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import java.util.Iterator; |
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import java.util.List; |
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32 | 0 | public class DataSqueezerImpl implements DataSqueezer |
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{ |
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protected static final String NULL_PREFIX = "X"; |
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protected static final int ARRAY_SIZE = 90; |
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protected static final int FIRST_ADAPTOR_OFFSET = 33; |
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46 | 0 | protected SqueezeAdaptor[] _adaptorByPrefix = new SqueezeAdaptor[ARRAY_SIZE]; |
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52 | 0 | protected StrategyRegistry _adaptors = new StrategyRegistryImpl(); |
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public void setSqueezeAdaptors(List adaptors) |
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{ |
56 | 0 | Iterator i = adaptors.iterator(); |
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58 | 0 | while (i.hasNext()) |
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{ |
60 | 0 | SqueezeAdaptor adaptor = (SqueezeAdaptor) i.next(); |
61 | 0 | register(adaptor); |
62 | 0 | } |
63 | 0 | } |
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public synchronized void register(SqueezeAdaptor adaptor) |
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{ |
77 | 0 | if (adaptor == null) |
78 | 0 | throw new IllegalArgumentException(Tapestry.getMessage("DataSqueezer.null-adaptor")); |
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80 | 0 | String prefix = adaptor.getPrefix(); |
81 | 0 | int prefixLength = prefix.length(); |
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int offset; |
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84 | 0 | if (prefixLength < 1) |
85 | 0 | throw new IllegalArgumentException(Tapestry.getMessage("DataSqueezer.short-prefix")); |
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87 | 0 | Class dataClass = adaptor.getDataClass(); |
88 | 0 | if (dataClass == null) |
89 | 0 | throw new IllegalArgumentException(Tapestry.getMessage("DataSqueezer.null-class")); |
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91 | 0 | for (int i = 0; i < prefixLength; i++) |
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{ |
93 | 0 | char ch = prefix.charAt(i); |
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95 | 0 | if (ch < '!' | ch > 'z') |
96 | 0 | throw new IllegalArgumentException(Tapestry |
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.getMessage("DataSqueezer.prefix-out-of-range")); |
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99 | 0 | offset = ch - FIRST_ADAPTOR_OFFSET; |
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101 | 0 | if (_adaptorByPrefix[offset] != null) |
102 | 0 | throw new IllegalArgumentException(Tapestry.format( |
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"DataSqueezer.adaptor-prefix-taken", |
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prefix.substring(i, i))); |
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106 | 0 | _adaptorByPrefix[offset] = adaptor; |
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} |
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110 | 0 | _adaptors.register(dataClass, adaptor); |
111 | 0 | } |
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public String squeeze(Object data) |
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{ |
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SqueezeAdaptor adaptor; |
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122 | 0 | if (data == null) |
123 | 0 | return NULL_PREFIX; |
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125 | 0 | adaptor = (SqueezeAdaptor) _adaptors.getStrategy(data.getClass()); |
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127 | 0 | return adaptor.squeeze(this, data); |
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} |
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public String[] squeeze(Object[] data) |
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{ |
137 | 0 | if (data == null) |
138 | 0 | return null; |
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140 | 0 | int length = data.length; |
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String[] result; |
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143 | 0 | result = new String[length]; |
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145 | 0 | for (int i = 0; i < length; i++) |
146 | 0 | result[i] = squeeze(data[i]); |
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148 | 0 | return result; |
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} |
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public Object unsqueeze(String string) |
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{ |
159 | 0 | SqueezeAdaptor adaptor = null; |
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161 | 0 | if (string.equals(NULL_PREFIX)) |
162 | 0 | return null; |
163 | 0 | else if (string.length() <= 0) |
164 | 0 | return null; |
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166 | 0 | int offset = string.charAt(0) - FIRST_ADAPTOR_OFFSET; |
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168 | 0 | if (offset >= 0 && offset < _adaptorByPrefix.length) |
169 | 0 | adaptor = _adaptorByPrefix[offset]; |
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175 | 0 | if (adaptor == null) |
176 | 0 | return string; |
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181 | 0 | return adaptor.unsqueeze(this, string); |
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} |
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public Object[] unsqueeze(String[] strings) |
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{ |
192 | 0 | if (strings == null) |
193 | 0 | return null; |
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195 | 0 | int length = strings.length; |
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Object[] result; |
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198 | 0 | result = new Object[length]; |
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200 | 0 | for (int i = 0; i < length; i++) |
201 | 0 | result[i] = unsqueeze(strings[i]); |
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203 | 0 | return result; |
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} |
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public String toString() |
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{ |
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StringBuffer buffer; |
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210 | 0 | buffer = new StringBuffer(); |
211 | 0 | buffer.append("DataSqueezer[adaptors=<"); |
212 | 0 | buffer.append(_adaptors.toString()); |
213 | 0 | buffer.append(">]"); |
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215 | 0 | return buffer.toString(); |
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} |
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} |