svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.exportto / org.gvsig.exportto.lib / org.gvsig.exportto.lib.impl / src / main / java / org / gvsig / export / impl / service / DefaultAttributeNamesTranslator.java @ 43925
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| 1 | 43504 | jjdelcerro | |
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| 2 | 43925 | jjdelcerro | package org.gvsig.export.impl.service; |
| 3 | 43504 | jjdelcerro | |
| 4 | import java.util.Collection; |
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| 5 | import java.util.HashMap; |
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| 6 | import java.util.Map; |
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| 7 | 43925 | jjdelcerro | import org.gvsig.export.spi.AttributeNamesTranslator; |
| 8 | 43504 | jjdelcerro | import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
| 9 | import org.gvsig.fmap.dal.feature.FeatureType; |
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| 10 | |||
| 11 | |||
| 12 | 43925 | jjdelcerro | public class DefaultAttributeNamesTranslator implements AttributeNamesTranslator { |
| 13 | 43504 | jjdelcerro | |
| 14 | private final Map<String,String> sourceToTarget; |
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| 15 | private final Map<String,String> targetToSource; |
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| 16 | private final int maxNameLen; |
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| 17 | |||
| 18 | 43925 | jjdelcerro | public DefaultAttributeNamesTranslator(FeatureType type, int maxNameLen) { |
| 19 | 43504 | jjdelcerro | this.maxNameLen = maxNameLen;
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| 20 | this.sourceToTarget = new HashMap<>(); |
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| 21 | this.targetToSource = new HashMap<>(); |
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| 22 | for( FeatureAttributeDescriptor attr : type) {
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| 23 | String source_name = attr.getName();
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| 24 | String target_name = buildTranslatedName(source_name, this.sourceToTarget.values()); |
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| 25 | if( !source_name.equals(target_name) ) {
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| 26 | this.sourceToTarget.put(source_name, target_name);
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| 27 | this.targetToSource.put(target_name, source_name);
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| 28 | } |
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| 29 | } |
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| 30 | } |
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| 31 | |||
| 32 | 43925 | jjdelcerro | @Override
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| 33 | 43504 | jjdelcerro | public String getTargetName(String name) { |
| 34 | return this.sourceToTarget.getOrDefault(name, name); |
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| 35 | } |
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| 36 | |||
| 37 | 43925 | jjdelcerro | @Override
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| 38 | 43504 | jjdelcerro | public String getSourceName(String name) { |
| 39 | return this.targetToSource.getOrDefault(name, name); |
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| 40 | } |
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| 41 | |||
| 42 | 43920 | jjdelcerro | @Override
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| 43 | 43504 | jjdelcerro | public boolean hasTranslations() { |
| 44 | return !this.sourceToTarget.isEmpty(); |
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| 45 | } |
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| 46 | |||
| 47 | 43925 | jjdelcerro | @Override
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| 48 | 43504 | jjdelcerro | public boolean hasTranslation(String name) { |
| 49 | return this.sourceToTarget.get(name)!=null; |
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| 50 | } |
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| 51 | |||
| 52 | private String buildTranslatedName(String source_name, Collection<String> current_names) { |
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| 53 | |||
| 54 | int len = source_name.length();
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| 55 | if (len <= this.maxNameLen) { |
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| 56 | /*
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| 57 | * Should not happen
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| 58 | */
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| 59 | return source_name;
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| 60 | } |
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| 61 | String target_name;
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| 62 | /*
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| 63 | * GDAL field name truncation method (extended from 100 to 255)
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| 64 | * THISISAVERYLONGNAME => THISISAVER, THISISAV_1 ... THISISAV_9,
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| 65 | * THISISAV10 ... THISISAV99, THISISA100 ... THISISA255
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| 66 | * (255 = max number of fields in a SHP)
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| 67 | */
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| 68 | for (int i=0; i<255; i++) { |
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| 69 | if (i==0) { |
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| 70 | target_name = source_name.substring(0, 10); |
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| 71 | } else if (i<=9) { |
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| 72 | target_name = source_name.substring(0, 8) + "_" + i; |
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| 73 | } else if (i<=99) { |
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| 74 | target_name = source_name.substring(0, 8) + i; |
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| 75 | } else {
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| 76 | target_name = source_name.substring(0, 7) + i; |
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| 77 | } |
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| 78 | if (!current_names.contains(target_name)) {
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| 79 | return target_name;
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| 80 | } |
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| 81 | } |
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| 82 | /*
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| 83 | * Should not get here
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| 84 | */
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| 85 | return source_name.substring(0, 4) + "_" + (System.currentTimeMillis() % 1000000); |
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| 86 | } |
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| 87 | } |