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NIFI-4857: Support String<->byte[] conversion for records
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85 changes: 85 additions & 0 deletions
85
...commons/nifi-record-path/src/main/java/org/apache/nifi/record/path/functions/ToBytes.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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 org.apache.nifi.record.path.functions; | ||
|
|
||
| import org.apache.nifi.record.path.FieldValue; | ||
| import org.apache.nifi.record.path.RecordPathEvaluationContext; | ||
| import org.apache.nifi.record.path.StandardFieldValue; | ||
| import org.apache.nifi.record.path.paths.RecordPathSegment; | ||
| import org.apache.nifi.record.path.util.RecordPathUtils; | ||
| import org.apache.nifi.serialization.record.RecordFieldType; | ||
| import org.apache.nifi.serialization.record.util.DataTypeUtils; | ||
|
|
||
| import java.nio.charset.Charset; | ||
| import java.util.stream.Stream; | ||
|
|
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| public class ToBytes extends RecordPathSegment { | ||
|
|
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| private final RecordPathSegment recordPath; | ||
| private final RecordPathSegment charsetSegment; | ||
|
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| public ToBytes(final RecordPathSegment recordPath, final RecordPathSegment charsetSegment, final boolean absolute) { | ||
| super("toBytes", null, absolute); | ||
| this.recordPath = recordPath; | ||
| this.charsetSegment = charsetSegment; | ||
| } | ||
|
|
||
| @Override | ||
| public Stream<FieldValue> evaluate(RecordPathEvaluationContext context) { | ||
| final Stream<FieldValue> fieldValues = recordPath.evaluate(context); | ||
| return fieldValues.filter(fv -> fv.getValue() != null) | ||
| .map(fv -> { | ||
|
|
||
| if (!(fv.getValue() instanceof String)) { | ||
| return fv; | ||
| } | ||
|
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| final Charset charset = getCharset(this.charsetSegment, context); | ||
|
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| final byte[] bytesValue; | ||
| try { | ||
| Byte[] src = (Byte[]) DataTypeUtils.toArray(fv.getValue(), fv.getField().getFieldName(), RecordFieldType.BYTE.getDataType(), charset); | ||
| bytesValue = new byte[src.length]; | ||
| for(int i=0;i<src.length;i++) { | ||
| bytesValue[i] = src[i]; | ||
| } | ||
| } catch (final Exception e) { | ||
| return fv; | ||
| } | ||
|
|
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| return new StandardFieldValue(bytesValue, fv.getField(), fv.getParent().orElse(null)); | ||
| }); | ||
| } | ||
|
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| private Charset getCharset(final RecordPathSegment charsetSegment, final RecordPathEvaluationContext context) { | ||
| if (charsetSegment == null) { | ||
| return null; | ||
| } | ||
|
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| final String charsetString = RecordPathUtils.getFirstStringValue(charsetSegment, context); | ||
| if (charsetString == null || charsetString.isEmpty()) { | ||
| return null; | ||
| } | ||
|
|
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| try { | ||
| return DataTypeUtils.getCharset(charsetString); | ||
| } catch (final Exception e) { | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| } |
95 changes: 95 additions & 0 deletions
95
...ommons/nifi-record-path/src/main/java/org/apache/nifi/record/path/functions/ToString.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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 org.apache.nifi.record.path.functions; | ||
|
|
||
| import org.apache.nifi.record.path.FieldValue; | ||
| import org.apache.nifi.record.path.RecordPathEvaluationContext; | ||
| import org.apache.nifi.record.path.StandardFieldValue; | ||
| import org.apache.nifi.record.path.paths.RecordPathSegment; | ||
| import org.apache.nifi.record.path.util.RecordPathUtils; | ||
| import org.apache.nifi.serialization.record.util.DataTypeUtils; | ||
|
|
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| import java.nio.charset.Charset; | ||
| import java.util.stream.Stream; | ||
|
|
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| public class ToString extends RecordPathSegment { | ||
|
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| private final RecordPathSegment recordPath; | ||
| private final RecordPathSegment charsetSegment; | ||
|
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| public ToString(final RecordPathSegment recordPath, final RecordPathSegment charsetSegment, final boolean absolute) { | ||
| super("toString", null, absolute); | ||
| this.recordPath = recordPath; | ||
| this.charsetSegment = charsetSegment; | ||
| } | ||
|
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| @Override | ||
| public Stream<FieldValue> evaluate(RecordPathEvaluationContext context) { | ||
| final Stream<FieldValue> fieldValues = recordPath.evaluate(context); | ||
| return fieldValues.filter(fv -> fv.getValue() != null) | ||
| .map(fv -> { | ||
| final Charset charset = getCharset(this.charsetSegment, context); | ||
| Object value = fv.getValue(); | ||
| final String stringValue; | ||
|
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| if (value instanceof Object[]) { | ||
| Object[] o = (Object[]) value; | ||
| if (o.length > 0) { | ||
|
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| byte[] dest = new byte[o.length]; | ||
| for (int i = 0; i < o.length; i++) { | ||
| dest[i] = (byte) o[i]; | ||
| } | ||
| stringValue = new String(dest, charset); | ||
| } else { | ||
| stringValue = ""; // Empty array = empty string | ||
| } | ||
| } else if (!(fv.getValue() instanceof byte[])) { | ||
| return fv; | ||
| } else { | ||
| try { | ||
| stringValue = DataTypeUtils.toString(fv.getValue(), (String) null, charset); | ||
| } catch (final Exception e) { | ||
| return fv; | ||
| } | ||
|
|
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| if (stringValue == null) { | ||
| return fv; | ||
| } | ||
| } | ||
| return new StandardFieldValue(stringValue, fv.getField(), fv.getParent().orElse(null)); | ||
| }); | ||
| } | ||
|
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| private Charset getCharset(final RecordPathSegment charsetSegment, final RecordPathEvaluationContext context) { | ||
| if (charsetSegment == null) { | ||
| return null; | ||
| } | ||
|
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| final String charsetString = RecordPathUtils.getFirstStringValue(charsetSegment, context); | ||
| if (charsetString == null || charsetString.isEmpty()) { | ||
| return null; | ||
| } | ||
|
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| try { | ||
| return DataTypeUtils.getCharset(charsetString); | ||
| } catch (final Exception e) { | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| } |
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