converter

Author: pan3793

clickhouse-native-jdbc/src/main/java/com/github/housepower/jdbc/convert/ByteArrayToBytesCharSeqConverter.java

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+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.github.housepower.jdbc.convert;
+
+import com.github.housepower.jdbc.misc.BytesCharSeq;
+
+
+public class ByteArrayToBytesCharSeqConverter implements Converter<byte[], BytesCharSeq> {
+
+    @Override
+    public BytesCharSeq convert(byte[] source) {
+        return new BytesCharSeq(source);
+    }
+}

clickhouse-native-jdbc/src/main/java/com/github/housepower/jdbc/convert/BytesCharSeqToByteArrayConverter.java

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+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.github.housepower.jdbc.convert;
+
+import com.github.housepower.jdbc.misc.BytesCharSeq;
+
+
+public class BytesCharSeqToByteArrayConverter implements Converter<BytesCharSeq, byte[]> {
+
+    @Override
+    public byte[] convert(BytesCharSeq source) {
+        return source.bytes();
+    }
+}

clickhouse-native-jdbc/src/main/java/com/github/housepower/jdbc/convert/Converter.java

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+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.github.housepower.jdbc.convert;
+
+import java.lang.reflect.ParameterizedType;
+
+/**
+ * A converter converts a source object of type {@code S} to a target of type {@code T}.
+ *
+ * <p>Implementations of this interface are thread-safe and can be shared.
+ *
+ * @param <S> the source type
+ * @param <T> the target type
+ */
+@FunctionalInterface
+public interface Converter<S, T> {
+
+    /**
+     * Convert the source object of type {@code S} to target type {@code T}.
+     *
+     * @param source the source object to convert, which must be an instance of {@code S}
+     * @return the converted object, which must be an instance of {@code T}
+     * @throws IllegalArgumentException if the source cannot be converted to the desired target type
+     */
+    T convert(S source);
+
+    @SuppressWarnings("unchecked")
+    default Class<T> sourceType() {
+        return (Class<T>) ((ParameterizedType) this.getClass().getGenericInterfaces()[0]).getActualTypeArguments()[0];
+    }
+
+    @SuppressWarnings("unchecked")
+    default Class<T> targetType() {
+        return (Class<T>) ((ParameterizedType) this.getClass().getGenericInterfaces()[0]).getActualTypeArguments()[1];
+    }
+}