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100 changes: 100 additions & 0 deletions
100
core/impl/src/main/java/com/blazebit/persistence/impl/function/cast/DB2CastFunction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Copyright 2014 - 2020 Blazebit. | ||
| * | ||
| * 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.blazebit.persistence.impl.function.cast; | ||
|
|
||
| import com.blazebit.persistence.impl.util.JpqlFunctionUtil; | ||
| import com.blazebit.persistence.spi.DbmsDialect; | ||
| import com.blazebit.persistence.spi.FunctionRenderContext; | ||
|
|
||
| /** | ||
| * @author Christian Beikov | ||
| * @since 1.2.0 | ||
| */ | ||
| public class DB2CastFunction extends CastFunction { | ||
|
|
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| private final String[] clobReturningFunctions = new String[] { | ||
| "json_value", | ||
| "json_query" | ||
| }; | ||
| private final String[] clobCompatibleCastTargetTypes = new String[] { | ||
| "char", | ||
| "varchar", | ||
| "graphic", | ||
| "vargraphic", | ||
| "dbclob", | ||
| "blob", | ||
| "xml" | ||
| }; | ||
|
|
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| public DB2CastFunction(Class<?> castType, DbmsDialect dbmsDialect) { | ||
| super(castType, dbmsDialect); | ||
| } | ||
|
|
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| @Override | ||
| public void render(FunctionRenderContext context) { | ||
| if (context.getArgumentsSize() != 1 && context.getArgumentsSize() != 2) { | ||
| throw new RuntimeException("The " + functionName + " function needs one argument <expression> with an optional second argument <sql-type-name>! args=" + context); | ||
| } | ||
| String effectiveCastTargetType; | ||
| if (context.getArgumentsSize() == 1) { | ||
| effectiveCastTargetType = defaultSqlCastType; | ||
| } else { | ||
| effectiveCastTargetType = JpqlFunctionUtil.unquoteSingleQuotes(context.getArgument(1)); | ||
| } | ||
| boolean insertVarcharCast = isClobReturningFunction(context.getArgument(0)) && !isClobCompatibleCastTarget(effectiveCastTargetType); | ||
| context.addChunk("cast("); | ||
| if (insertVarcharCast) { | ||
| context.addChunk("cast("); | ||
| } | ||
| context.addArgument(0); | ||
| if (insertVarcharCast) { | ||
| context.addChunk(" as varchar(32000))"); | ||
| } | ||
| context.addChunk(" as "); | ||
| context.addChunk(effectiveCastTargetType); | ||
| context.addChunk(")"); | ||
| } | ||
|
|
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| @Override | ||
| public String getCastExpression(String argument) { | ||
| boolean insertVarcharCast = isClobReturningFunction(argument) && !isClobCompatibleCastTarget(defaultSqlCastType); | ||
| if (insertVarcharCast) { | ||
| return "cast(cast(" + argument + " as varchar(32000)) as " + defaultSqlCastType + ")"; | ||
| } else { | ||
| return "cast(" + argument + " as " + defaultSqlCastType + ")"; | ||
| } | ||
| } | ||
|
|
||
| private boolean isClobReturningFunction(String castSource) { | ||
| for (int i = 0; i < clobReturningFunctions.length; i++) { | ||
| if (castSource.toLowerCase().startsWith(clobReturningFunctions[i] + "(")) { | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
|
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| private boolean isClobCompatibleCastTarget(String castTargetType) { | ||
| for (int i = 0; i < clobCompatibleCastTargetTypes.length; i++) { | ||
| if (castTargetType.equalsIgnoreCase(clobCompatibleCastTargetTypes[i]) || | ||
| castTargetType.toLowerCase().startsWith(clobCompatibleCastTargetTypes[i] + "(")) { | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
| } |
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74 changes: 74 additions & 0 deletions
74
...src/main/java/com/blazebit/persistence/impl/function/jsonget/AbstractJsonGetFunction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| /* | ||
| * Copyright 2014 - 2020 Blazebit. | ||
| * | ||
| * 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.blazebit.persistence.impl.function.jsonget; | ||
|
|
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| import com.blazebit.persistence.spi.FunctionRenderContext; | ||
| import com.blazebit.persistence.spi.JpqlFunction; | ||
|
|
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| /** | ||
| * @author Moritz Becker | ||
| * @since 1.5.0 | ||
| */ | ||
| public abstract class AbstractJsonGetFunction implements JpqlFunction { | ||
|
|
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| public static final String FUNCTION_NAME = "json_get"; | ||
|
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| @Override | ||
| public boolean hasArguments() { | ||
| return true; | ||
| } | ||
|
|
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| @Override | ||
| public boolean hasParenthesesIfNoArguments() { | ||
| return true; | ||
| } | ||
|
|
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| @Override | ||
| public Class<?> getReturnType(Class<?> firstArgumentType) { | ||
| return String.class; | ||
| } | ||
|
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| @Override | ||
| public void render(FunctionRenderContext context) { | ||
| if (context.getArgumentsSize() < 2) { | ||
| throw new RuntimeException("The " + FUNCTION_NAME + " function requires at least two arguments <jsonField>, <key1|arrayIndex1>, ..., <keyN|arrayIndexN>! args=" + context); | ||
| } | ||
| render0(context); | ||
| } | ||
|
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| protected abstract void render0(FunctionRenderContext context); | ||
|
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| public static String toJsonPath(Object[] pathElements, int to, boolean quotePathElements) { | ||
| StringBuilder jsonPathBuilder = new StringBuilder("$"); | ||
| for (int i = 0; i < to; i++) { | ||
| if (pathElements[i] instanceof Integer) { | ||
| jsonPathBuilder.append('['); | ||
| jsonPathBuilder.append((int) pathElements[i]); | ||
| jsonPathBuilder.append(']'); | ||
| } else { | ||
| jsonPathBuilder.append('.'); | ||
| if (quotePathElements) { | ||
| jsonPathBuilder.append("\""); | ||
| } | ||
| jsonPathBuilder.append((String) pathElements[i]); | ||
| if (quotePathElements) { | ||
| jsonPathBuilder.append("\""); | ||
| } | ||
| } | ||
| } | ||
| return jsonPathBuilder.toString(); | ||
| } | ||
| } |
47 changes: 47 additions & 0 deletions
47
...impl/src/main/java/com/blazebit/persistence/impl/function/jsonget/DB2JsonGetFunction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| /* | ||
| * Copyright 2014 - 2020 Blazebit. | ||
| * | ||
| * 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.blazebit.persistence.impl.function.jsonget; | ||
|
|
||
| import com.blazebit.persistence.impl.util.JpqlFunctionUtil; | ||
| import com.blazebit.persistence.spi.FunctionRenderContext; | ||
|
|
||
| /** | ||
| * @author Moritz Becker | ||
| * @since 1.5.0 | ||
| */ | ||
| public class DB2JsonGetFunction extends AbstractJsonGetFunction { | ||
|
|
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| @Override | ||
| protected void render0(FunctionRenderContext context) { | ||
| Object[] jsonPathElements = new Object[context.getArgumentsSize()]; | ||
| jsonPathElements[0] = "val"; | ||
| for (int i = 1; i < context.getArgumentsSize(); i++) { | ||
| try { | ||
| jsonPathElements[i] = Integer.parseInt(JpqlFunctionUtil.unquoteSingleQuotes(context.getArgument(i))); | ||
| } catch (NumberFormatException e) { | ||
| jsonPathElements[i] = JpqlFunctionUtil.unquoteDoubleQuotes(JpqlFunctionUtil.unquoteSingleQuotes(context.getArgument(i))); | ||
| } | ||
| } | ||
| String jsonPath = AbstractJsonGetFunction.toJsonPath(jsonPathElements, jsonPathElements.length, false); | ||
|
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| context.addChunk("json_query(concat('{\"val\":', concat("); | ||
| context.addArgument(0); | ||
| context.addChunk(", '}'))"); | ||
| context.addChunk(",'"); | ||
| context.addChunk(jsonPath); | ||
| context.addChunk("' OMIT QUOTES)"); | ||
| } | ||
| } |
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