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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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/* | ||
* 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; | ||
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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; | ||
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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; | ||
} | ||
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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 -> { | ||
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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; | ||
} | ||
} | ||
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} |
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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/* | ||
* 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; | ||
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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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} |
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