feat(pdf-engines): add conversion properties and options

src/main/java/dev/inaka/pdfengines/PDFEnginesConversionOptions.java

@@ -0,0 +1,22 @@
+package dev.inaka.pdfengines;
+
+/**
+ * The PDFEnginesConversionOptions class is used to configure LibreOffice conversion options.
+ */
+public final class PDFEnginesConversionOptions extends PDFEnginesOptions {
+
+    private PDFEnginesConversionOptions(Builder builder) {
+        super(builder);
+    }
+
+    /**
+     * The Builder class is used to construct instances of PDFEnginesConversionOptions with specific configuration options.
+     */
+    public static class Builder extends PDFEnginesOptions.Builder<PDFEnginesConversionOptions> {
+
+        @Override
+        public PDFEnginesConversionOptions build() {
+            return new PDFEnginesConversionOptions(this);
+        }
+    }
+}

src/main/java/dev/inaka/pdfengines/PDFEnginesMergeOptions.java

@@ -0,0 +1,39 @@
+package dev.inaka.pdfengines;
+
+import org.json.JSONObject;
+
+/**
+ * The PDFEnginesMergeOptions class is used to configure LibreOffice conversion options.
+ */
+public final class PDFEnginesMergeOptions extends PDFEnginesOptions {
+    private final String metadata;
+
+    private PDFEnginesMergeOptions(Builder builder) {
+        super(builder);
+        metadata = builder.metadata;
+    }
+
+    /**
+     * The Builder class is used to construct instances of PDFEnginesMergeOptions with specific configuration options.
+     */
+    public static class Builder extends PDFEnginesOptions.Builder<PDFEnginesMergeOptions> {
+        private String metadata = null;
+
+        /**
+         * Sets the metadata to be used by PDF Engines.
+         *
+         * @param metadata The metadata.
+         * @return The Builder instance for method chaining.
+         */
+        public Builder addMetadata(JSONObject metadata) {
+            this.metadata = String.valueOf(metadata);
+            return this;
+        }
+
+        @Override
+        public PDFEnginesMergeOptions build() {
+            return new PDFEnginesMergeOptions(this);
+        }
+    }
+}
+

src/main/java/dev/inaka/pdfengines/PDFEnginesOptions.java

@@ -0,0 +1,54 @@
+package dev.inaka.pdfengines;
+
+import dev.inaka.common.PdfFormat;
+
+/**
+ * The PDFEnginesOptions class is used to configure LibreOffice conversion options.
+ */
+public abstract class PDFEnginesOptions {
+    protected final String pdfa;
+    protected final String pdfua;
+
+    protected PDFEnginesOptions(Builder builder) {
+        pdfa = builder.pdfa;
+        pdfua = builder.pdfua;
+    }
+
+    /**
+     * The Builder class is used to construct instances of PDFEnginesOptions with specific configuration options.
+     */
+    public static abstract class Builder<T extends PDFEnginesOptions> {
+        protected String pdfa = null;
+        protected String pdfua = "false";
+
+        /**
+         * Sets the PDF/A format to be used by PDF Engines.
+         *
+         * @param pdfa The PDF/A format.
+         * @return The Builder instance for method chaining.
+         */
+        public Builder<T> addPdfa(PdfFormat pdfa) {
+            this.pdfa = String.valueOf(pdfa);
+            return this;
+        }
+
+        /**
+         * Sets whether to use PDF/UA.
+         *
+         * @param pdfua Whether to use PDF/UA.
+         * @return The Builder instance for method chaining.
+         */
+        public Builder<T> addPdfua(String pdfua) {
+            this.pdfua = pdfua;
+            return this;
+        }
+
+        /**
+         * Builds and returns an instance of PDFEnginesOptions with the configured options.
+         *
+         * @return An instance of PDFEnginesOptions with the configured options.
+         */
+        public abstract T build();
+    }
+}
+