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TEIID-4974 TEIID-5030 TEIID-5031 TEIID-5033 TEIID-5034 TEIID-5035
TEIID-5036 TEIID-5037 addressing various couchbase issues
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125 changes: 125 additions & 0 deletions
125
...tor-couchbase/src/main/java/org/teiid/translator/couchbase/SubstringFunctionModifier.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| /* | ||
| * Copyright Red Hat, Inc. and/or its affiliates | ||
| * and other contributors as indicated by the @author tags and | ||
| * the COPYRIGHT.txt file distributed with this work. | ||
| * | ||
| * 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 org.teiid.translator.couchbase; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.Arrays; | ||
| import java.util.List; | ||
|
|
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| import org.teiid.language.Comparison; | ||
| import org.teiid.language.Comparison.Operator; | ||
| import org.teiid.language.Expression; | ||
| import org.teiid.language.Function; | ||
| import org.teiid.language.Literal; | ||
| import org.teiid.language.SearchedCase; | ||
| import org.teiid.language.SearchedWhenClause; | ||
| import org.teiid.translator.SourceSystemFunctions; | ||
| import org.teiid.translator.TypeFacility; | ||
| import org.teiid.translator.jdbc.AliasModifier; | ||
|
|
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| public class SubstringFunctionModifier extends AliasModifier { | ||
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| public SubstringFunctionModifier() { | ||
| super("substr"); //$NON-NLS-1$ | ||
| } | ||
|
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| @Override | ||
| public List<?> translate(Function function) { | ||
| this.modify(function); | ||
|
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| Expression from = function.getParameters().get(1); | ||
| Boolean isFromNegative = isNegative(from); | ||
|
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| Function length = new Function( | ||
| SourceSystemFunctions.LENGTH, | ||
| Arrays.asList(function.getParameters().get(0)), | ||
| TypeFacility.RUNTIME_TYPES.INTEGER); | ||
|
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| if (function.getParameters().size() == 2 && (isFromNegative == null || isFromNegative)) { | ||
| //couchbase does not handle default length with a negative from index | ||
| function.getParameters().add(length); | ||
| } | ||
|
|
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| if (function.getParameters().size() == 3) { | ||
| //case when length > LENGTH(string) - start + 1 then LENGTH(string) - start + 1 case when length > 0 then length end | ||
| Expression forLength = function.getParameters().get(2); | ||
| List<SearchedWhenClause> clauses = new ArrayList<SearchedWhenClause>(2); | ||
| Boolean isNegative = isNegative(forLength); | ||
|
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| Expression adjustedFrom = from; | ||
| if (isFromNegative == null || isFromNegative) { | ||
| adjustedFrom = new SearchedCase(Arrays.asList(new SearchedWhenClause(new Comparison(from, new Literal(0, TypeFacility.RUNTIME_TYPES.INTEGER), Operator.LT), new Function( | ||
| SourceSystemFunctions.ADD_OP, | ||
| Arrays.asList( | ||
| new Function(SourceSystemFunctions.ADD_OP, Arrays.asList(length, new Literal(1, TypeFacility.RUNTIME_TYPES.INTEGER)),TypeFacility.RUNTIME_TYPES.INTEGER), | ||
| from), | ||
| TypeFacility.RUNTIME_TYPES.INTEGER))), | ||
| from, TypeFacility.RUNTIME_TYPES.INTEGER); | ||
| } | ||
|
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| Expression maxLength = new Function( | ||
| SourceSystemFunctions.SUBTRACT_OP, | ||
| Arrays.asList(length, | ||
| new Function( | ||
| SourceSystemFunctions.SUBTRACT_OP, | ||
| Arrays.asList( | ||
| adjustedFrom, | ||
| new Literal(1, TypeFacility.RUNTIME_TYPES.INTEGER)), | ||
| TypeFacility.RUNTIME_TYPES.INTEGER)), | ||
| TypeFacility.RUNTIME_TYPES.INTEGER); | ||
| clauses.add(new SearchedWhenClause(new Comparison(forLength, maxLength, Operator.GT), maxLength)); | ||
| Expression defaultExpr = null; | ||
| if (isNegative == null) { | ||
| clauses.add(new SearchedWhenClause(new Comparison(forLength, new Literal(0, TypeFacility.RUNTIME_TYPES.INTEGER), Operator.GT), forLength)); | ||
| } else if (isNegative) { | ||
| //TODO: could be done in the rewriter | ||
| return Arrays.asList(new Literal(null, TypeFacility.RUNTIME_TYPES.STRING)); | ||
| } else { | ||
| defaultExpr = forLength; | ||
| } | ||
| SearchedCase sc = new SearchedCase(clauses, | ||
| defaultExpr, TypeFacility.RUNTIME_TYPES.INTEGER); | ||
| function.getParameters().set(2, sc); | ||
| } | ||
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| Expression adjustedFrom = function.getParameters().get(1); | ||
| if (isFromNegative == null) { | ||
| //case when start > 0 then start - 1 else start end | ||
| SearchedCase sc = new SearchedCase(Arrays.asList(new SearchedWhenClause(new Comparison(adjustedFrom, new Literal(0, TypeFacility.RUNTIME_TYPES.INTEGER), Operator.GT), | ||
| new Function(SourceSystemFunctions.SUBTRACT_OP, Arrays.asList(adjustedFrom, new Literal(1, TypeFacility.RUNTIME_TYPES.INTEGER)),TypeFacility.RUNTIME_TYPES.INTEGER))), | ||
| from, TypeFacility.RUNTIME_TYPES.INTEGER); | ||
| function.getParameters().set(1, sc); | ||
| } else if (!isFromNegative){ | ||
| function.getParameters().set(1, new Function(SourceSystemFunctions.SUBTRACT_OP, Arrays.asList(adjustedFrom, new Literal(1, TypeFacility.RUNTIME_TYPES.INTEGER)),TypeFacility.RUNTIME_TYPES.INTEGER)); | ||
| } | ||
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| return null; | ||
| } | ||
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| private Boolean isNegative(Expression ex) { | ||
| Boolean isNegative = null; | ||
| if (ex instanceof Literal) { | ||
| Literal l = (Literal)ex; | ||
| int value = (Integer)l.getValue(); | ||
| isNegative = value < 0; | ||
| } | ||
| return isNegative; | ||
| } | ||
|
|
||
| } |
37 changes: 37 additions & 0 deletions
37
...base/translator-couchbase/src/test/java/org/teiid/translator/couchbase/TestCouchbase.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| /* | ||
| * Copyright Red Hat, Inc. and/or its affiliates | ||
| * and other contributors as indicated by the @author tags and | ||
| * the COPYRIGHT.txt file distributed with this work. | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| package org.teiid.translator.couchbase; | ||
|
|
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| import static org.junit.Assert.*; | ||
|
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| import org.junit.Ignore; | ||
| import org.junit.Test; | ||
| import org.teiid.translator.TranslatorException; | ||
| import org.teiid.translator.TypeFacility; | ||
|
|
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| @Ignore | ||
| public class TestCouchbase { | ||
|
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| @Test public void testConvert() throws TranslatorException { | ||
| CouchbaseExecutionFactory cef = new CouchbaseExecutionFactory(); | ||
| cef.start(); | ||
| assertFalse(cef.supportsConvert(TypeFacility.RUNTIME_CODES.STRING, TypeFacility.RUNTIME_CODES.DATE)); | ||
| assertTrue(cef.supportsConvert(TypeFacility.RUNTIME_CODES.STRING, TypeFacility.RUNTIME_CODES.DOUBLE)); | ||
| } | ||
| } |
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