package jnpf.dmsEntity.watermark;
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import com.fasterxml.jackson.core.JsonParser;
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import com.fasterxml.jackson.core.JsonToken;
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import com.fasterxml.jackson.databind.DeserializationContext;
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import com.fasterxml.jackson.databind.JsonDeserializer;
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import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
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import jnpf.exception.DataException;
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import lombok.Data;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.LinkedHashSet;
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/** Runtime barcode entries shared by preview, download and print, in caller-specified order. */
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@Data
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public class DmsWatermarkParameters {
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public static final String CUSTOM_BARCODE_TEMPLATE = "{/CUSTOM_BARCODE_TEXT}";
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private List<CustomBarcode> customBarcode;
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private List<String> watermarkBusinessTypes;
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public DmsWatermarkParameters normalized() {
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DmsWatermarkParameters result = new DmsWatermarkParameters();
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if (watermarkBusinessTypes != null) {
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if (watermarkBusinessTypes.size() > 50) throw new DataException("水印业务类型不能超过 50 项");
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LinkedHashSet<String> types = new LinkedHashSet<>();
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for (String value : watermarkBusinessTypes) {
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if (value == null || value.isBlank() || value.length() > 100 || !value.equals(value.trim())) {
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throw new DataException("水印业务类型取值无效");
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}
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types.add(value);
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}
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result.setWatermarkBusinessTypes(new ArrayList<>(types));
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}
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if (customBarcode != null) {
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if (customBarcode.isEmpty()) throw new DataException("customBarcode 数组不能为空；不需要自定义条码时请省略该参数");
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if (customBarcode.size() > 10000) throw new DataException("自定义条码数组不能超过 10000 项");
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List<CustomBarcode> entries = new ArrayList<>();
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for (CustomBarcode item : customBarcode) {
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if (item == null) throw new DataException("自定义条码数组不能包含空项");
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if (item.getPage() != null && item.getPage() < 1) {
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throw new DataException("水印页码必须是从 1 开始的正整数；省略 page 表示每页渲染");
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}
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validateText(item.getBarValue(), "条码内容 barValue");
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validateText(item.getBarText(), "条码显示文字 barText");
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CustomBarcode copy = new CustomBarcode();
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copy.setPage(item.getPage());
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copy.setBarValue(item.getBarValue());
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copy.setBarText(item.getBarText());
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entries.add(copy);
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}
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result.setCustomBarcode(entries);
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}
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return result;
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}
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private static void validateText(String text, String label) {
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if (text == null || text.isBlank()) throw new DataException(label + "不能为空");
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if (text.length() > 2000) throw new DataException(label + "不能超过 2000 个字符");
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}
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@Data
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public static class CustomBarcode {
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/** Null means every physical page. Repeated page entries are intentionally retained. */
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@JsonDeserialize(using = PageNumberDeserializer.class)
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private Integer page;
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private String barValue;
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private String barText;
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}
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/** Do not let Jackson silently truncate 1.5 or coerce "2" into an integer page. */
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public static class PageNumberDeserializer extends JsonDeserializer<Integer> {
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@Override
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public Integer deserialize(JsonParser parser, DeserializationContext context) throws IOException {
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if (!parser.hasToken(JsonToken.VALUE_NUMBER_INT)) {
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return (Integer) context.handleUnexpectedToken(Integer.class, parser);
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}
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return parser.getIntValue();
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}
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}
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}
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