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133
Kitodo-DataEditor/src/main/java/org/kitodo/dataeditor/ruleset/ReimportMetadata.java
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| @@ -0,0 +1,133 @@ | ||
| /* | ||
| * (c) Kitodo. Key to digital objects e. V. <[email protected]> | ||
| * | ||
| * This file is part of the Kitodo project. | ||
| * | ||
| * It is licensed under GNU General Public License version 3 or later. | ||
| * | ||
| * For the full copyright and license information, please read the | ||
| * GPL3-License.txt file that was distributed with this source code. | ||
| */ | ||
|
|
||
| package org.kitodo.dataeditor.ruleset; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.Objects; | ||
| import java.util.function.Supplier; | ||
|
|
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| import org.apache.commons.lang3.ArrayUtils; | ||
| import org.kitodo.api.Metadata; | ||
| import org.kitodo.dataeditor.ruleset.xml.Reimport; | ||
|
|
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| /** | ||
| * Determines the result of re-importing metadata for a single metadata key. | ||
| */ | ||
| class ReimportMetadata implements Supplier<Collection<Metadata>> { | ||
|
|
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| // Metadata key for which the result of the reimport is determined. | ||
| private final String key; | ||
|
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| // existing metadata for this key before reimport | ||
| private final Collection<Metadata> currentEntries; | ||
|
|
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| // configured reimport behavior | ||
| private Reimport reimport; | ||
|
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| // metadata fetched on reimport | ||
| private final Collection<Metadata> updateEntries; | ||
|
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| // the maximum amount of metadata applicable here for this key | ||
| private int maxOccurs; | ||
|
|
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| /** | ||
| * <b>Constructor.</b><!-- --> Generates a data set for the re-import of | ||
| * metadata for a specific key. | ||
| * | ||
| * @param key | ||
| * metadata key for which the result of the reimport is | ||
| * determined | ||
| */ | ||
| ReimportMetadata(String key) { | ||
| this.currentEntries = new ArrayList<>(); | ||
| this.updateEntries = new ArrayList<>(); | ||
| this.key = key; | ||
| this.maxOccurs = Integer.MAX_VALUE; | ||
| } | ||
|
|
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| /** | ||
| * Sets the repeated import behavior model for this metadata key. Must be a | ||
| * value from {@link Reimport}. | ||
| * | ||
| * @param reimport | ||
| * configured reimport behavior to set | ||
| */ | ||
| void setReimport(Reimport reimport) { | ||
| this.reimport = reimport; | ||
| } | ||
|
|
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| /** | ||
| * Sets the maximum number of metadata values allowed for this key. The | ||
| * setting only affects newly added metadata. | ||
| * | ||
| * @param maxOccurs | ||
| * maximum amount of metadata to set | ||
| */ | ||
| void setMaxOccurs(int maxOccurs) { | ||
| this.maxOccurs = maxOccurs; | ||
| } | ||
|
|
||
| /** | ||
| * Returns the metadata key. The key is that of the contained metadata. | ||
| * | ||
| * @return the metadata key | ||
| */ | ||
| String getKey() { | ||
| return key; | ||
| } | ||
|
|
||
| /** | ||
| * Adds a metadata entry to the current metadata entries. | ||
| * | ||
| * @param metadata | ||
| * metadata to add | ||
| */ | ||
| void addToCurrentEntries(Metadata metadata) { | ||
| assert Objects.equals(metadata.getKey(), key) : "keys should match"; | ||
| currentEntries.add(metadata); | ||
| } | ||
|
|
||
| /** | ||
| * Adds a metadata entry to the update metadata entries. | ||
| * | ||
| * @param metadata | ||
| * metadata to add | ||
| */ | ||
| void addToUpdateEntries(Metadata metadata) { | ||
| assert Objects.equals(metadata.getKey(), key) : "keys should match"; | ||
| updateEntries.add(metadata); | ||
| } | ||
|
|
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| /** | ||
| * Merges the metadata of this key in the given behavior, respecting the | ||
| * maximum number. | ||
| * | ||
| * @return the metadata remaining after the repeated import | ||
| */ | ||
| @Override | ||
| public Collection<Metadata> get() { | ||
| if (!ArrayUtils.contains(Reimport.values(), reimport)) { | ||
| throw new IllegalStateException("Used not supported reimport case ".concat(Objects.toString(reimport))); | ||
| } | ||
| Collection<Metadata> result = reimport.equals(Reimport.REPLACE) && !updateEntries.isEmpty() ? new ArrayList<>() | ||
| : new ArrayList<>(currentEntries); | ||
| if (!reimport.equals(Reimport.KEEP) || result.isEmpty()) { | ||
| for (Metadata metadata : updateEntries) { | ||
| if (!result.contains(metadata) && result.size() < maxOccurs) { | ||
| result.add(metadata); | ||
| } | ||
| } | ||
| } | ||
| return result; | ||
| } | ||
| } |
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