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package org.apache.giraph.io.formats.multi; |
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import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration; |
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import org.apache.giraph.conf.StrConfOption; |
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import org.apache.giraph.io.MappingInputFormat; |
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import org.apache.hadoop.conf.Configuration; |
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import org.apache.hadoop.io.Writable; |
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import org.apache.hadoop.io.WritableComparable; |
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import org.json.JSONArray; |
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import org.json.JSONException; |
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import com.google.common.collect.Lists; |
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import java.util.List; |
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public class MappingInputFormatDescription<I extends WritableComparable, |
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V extends Writable, E extends Writable, B extends Writable> |
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extends InputFormatDescription<MappingInputFormat<I, V, E, B>> { |
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55 | 0 | public static final StrConfOption MAPPING_INPUT_FORMAT_DESCRIPTIONS = |
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new StrConfOption("giraph.multiMappingInput.descriptions", null, |
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"MappingInputFormats description - JSON array containing a JSON " + |
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"array for each mapping input. Mapping input JSON arrays contain " + |
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"one or two elements - first one is the name of mapping input " + |
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"class, and second one is JSON object with all specific parameters " + |
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"for this mapping input. For example: [[\"VIF1\",{\"p\":\"v1\"}]," + |
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"[\"VIF2\",{\"p\":\"v2\",\"q\":\"v\"}]]\""); |
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public MappingInputFormatDescription( |
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Class<? extends MappingInputFormat<I, V, E, B>> mappingInputFormatClass |
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) { |
72 | 0 | super(mappingInputFormatClass); |
73 | 0 | } |
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public MappingInputFormatDescription(String description) { |
81 | 0 | super(description); |
82 | 0 | } |
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private ImmutableClassesGiraphConfiguration<I, V, E> |
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createConfigurationCopy( |
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ImmutableClassesGiraphConfiguration<I, V, E> conf) { |
94 | 0 | ImmutableClassesGiraphConfiguration<I, V, E> confCopy = |
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new ImmutableClassesGiraphConfiguration<I, V, E>(conf); |
96 | 0 | confCopy.setMappingInputFormatClass(getInputFormatClass()); |
97 | 0 | putParametersToConfiguration(confCopy); |
98 | 0 | return confCopy; |
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} |
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public static <I extends WritableComparable, V extends Writable, |
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E extends Writable, B extends Writable> |
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List<MappingInputFormatDescription<I, V, E, B>> |
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getMappingInputFormatDescriptions(Configuration conf) { |
115 | 0 | String mappingInputFormatDescriptions = |
116 | 0 | MAPPING_INPUT_FORMAT_DESCRIPTIONS.get(conf); |
117 | 0 | if (mappingInputFormatDescriptions == null) { |
118 | 0 | return Lists.newArrayList(); |
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} |
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try { |
121 | 0 | JSONArray inputFormatsJson = new JSONArray( |
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mappingInputFormatDescriptions); |
123 | 0 | List<MappingInputFormatDescription<I, V, E, B>> descriptions = |
124 | 0 | Lists.newArrayListWithCapacity(inputFormatsJson.length()); |
125 | 0 | for (int i = 0; i < inputFormatsJson.length(); i++) { |
126 | 0 | descriptions.add(new MappingInputFormatDescription<I, V, E, B>( |
127 | 0 | inputFormatsJson.getJSONArray(i).toString())); |
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} |
129 | 0 | return descriptions; |
130 | 0 | } catch (JSONException e) { |
131 | 0 | throw new IllegalStateException("getMappingInputFormatDescriptions: " + |
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"JSONException occurred while trying to process " + |
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mappingInputFormatDescriptions, e); |
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} |
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} |
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public static <I extends WritableComparable, V extends Writable, |
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E extends Writable, B extends Writable> |
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List<MappingInputFormat<I, V, E, B>> createMappingInputFormats( |
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ImmutableClassesGiraphConfiguration<I, V, E> conf) { |
151 | 0 | List<MappingInputFormatDescription<I, V, E, B>> descriptions = |
152 | 0 | getMappingInputFormatDescriptions(conf); |
153 | 0 | List<MappingInputFormat<I, V, E, B>> mappingInputFormats = |
154 | 0 | Lists.newArrayListWithCapacity(descriptions.size()); |
155 | 0 | for (MappingInputFormatDescription<I, V, E, B> description : descriptions) { |
156 | 0 | ImmutableClassesGiraphConfiguration<I, V, E> confCopy = |
157 | 0 | description.createConfigurationCopy(conf); |
158 | 0 | mappingInputFormats.add((MappingInputFormat<I, V, E, B>) |
159 | 0 | confCopy.createWrappedMappingInputFormat()); |
160 | 0 | } |
161 | 0 | return mappingInputFormats; |
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} |
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} |