Created
February 13, 2013 15:15
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InputStreamDataSourceWithHackForSchemaValidation
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| import javax.activation.DataSource; | |
| import java.io.ByteArrayInputStream; | |
| import java.io.IOException; | |
| import java.io.InputStream; | |
| import java.io.OutputStream; | |
| /** | |
| * Vzniklo to, protoze servisa, ktera ma zapnute @SchemaValidation | |
| * Udela to, ze pri validaci zavola getInputStream a cely ho precte | |
| * Potom se pri vyplnovani responsu znova zavola getInputStream a chce ho napsat do response, jenomze | |
| * to umre, protoze ho uz precetla a zavrela validace. | |
| * | |
| * Reseni: na prvni volani to nevrati pravy inputStream | |
| */ | |
| public class InputStreamDataSourceWithHackForSchemaValidation implements DataSource { | |
| private InputStream inputStream; | |
| private int count = 0; | |
| public InputStreamDataSourceWithHackForSchemaValidation(InputStream inputStream) { | |
| this.inputStream = inputStream; | |
| } | |
| @Override | |
| public InputStream getInputStream() throws IOException { | |
| if (count == 0) { | |
| //First access to data stream is for @SchemaValidation (and we do not need read stream for validation) | |
| count++; | |
| return new ByteArrayInputStream(new byte[]{}); | |
| } | |
| if (count != 1) { | |
| throw new IllegalStateException("getInputStream was expected to be called exactly twice"); | |
| } | |
| //second access is for writing data to response | |
| count++; | |
| return inputStream; | |
| } | |
| @Override | |
| public OutputStream getOutputStream() throws IOException { | |
| throw new UnsupportedOperationException("Not implemented"); | |
| } | |
| @Override | |
| public String getContentType() { | |
| return "*/*"; | |
| } | |
| @Override | |
| public String getName() { | |
| return "InputStreamDataSource"; | |
| } | |
| } |
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