| /******************************************************************************* |
| * 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.ofbiz.entity.condition; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.ofbiz.base.util.UtilGenerics; |
| import org.ofbiz.entity.Delegator; |
| import org.ofbiz.entity.GenericModelException; |
| import org.ofbiz.entity.config.model.Datasource; |
| import org.ofbiz.entity.model.ModelEntity; |
| import org.ofbiz.entity.model.ModelField; |
| |
| /** |
| * Base class for entity functions. |
| * |
| */ |
| @SuppressWarnings("serial") |
| public abstract class EntityFunction<T extends Comparable<?>> extends EntityConditionValue { |
| |
| public static interface Fetcher<T> { |
| T getValue(Object value); |
| } |
| |
| public static enum SQLFunction { |
| LENGTH, TRIM, UPPER, LOWER; |
| } |
| |
| public static final int ID_LENGTH = SQLFunction.LENGTH.ordinal(); |
| public static final int ID_TRIM = SQLFunction.TRIM.ordinal(); |
| public static final int ID_UPPER = SQLFunction.UPPER.ordinal(); |
| public static final int ID_LOWER = SQLFunction.LOWER.ordinal(); |
| |
| public static EntityFunction<Integer> LENGTH(EntityConditionValue nested) { return new LENGTH(nested); } |
| public static EntityFunction<Integer> LENGTH(Object value) { return new LENGTH(value); } |
| public static EntityFunction<String> TRIM(EntityConditionValue nested) { return new TRIM(nested); } |
| public static EntityFunction<String> TRIM(Object value) { return new TRIM(value); } |
| public static EntityFunction<String> UPPER(EntityConditionValue nested) { return new UPPER(nested); } |
| public static EntityFunction<String> UPPER(Object value) { return new UPPER(value); } |
| public static EntityFunction<String> UPPER_FIELD(String fieldName) { return new UPPER(EntityFieldValue.makeFieldValue(fieldName)); } |
| public static EntityFunction<String> LOWER(EntityConditionValue nested) { return new LOWER(nested); } |
| public static EntityFunction<String> LOWER(Object value) { return new LOWER(value); } |
| |
| /** |
| * Length() entity function. |
| * |
| */ |
| public static class LENGTH extends EntityFunctionSingle<Integer> { |
| public static Fetcher<Integer> FETCHER = new Fetcher<Integer>() { |
| public Integer getValue(Object value) { return value.toString().length(); } |
| }; |
| |
| private LENGTH(Object value) { |
| super(FETCHER, SQLFunction.LENGTH, value); |
| } |
| } |
| |
| /** |
| * Trim() entity function. |
| * |
| */ |
| public static class TRIM extends EntityFunctionSingle<String> { |
| public static Fetcher<String> FETCHER = new Fetcher<String>() { |
| public String getValue(Object value) { return value.toString().trim(); } |
| }; |
| |
| private TRIM(Object value) { |
| super(FETCHER, SQLFunction.TRIM, value); |
| } |
| } |
| |
| /** |
| * Upper() entity function. |
| * |
| */ |
| public static class UPPER extends EntityFunctionSingle<String> { |
| public static Fetcher<String> FETCHER = new Fetcher<String>() { |
| public String getValue(Object value) { return value.toString().toUpperCase(); } |
| }; |
| |
| private UPPER(Object value) { |
| super(FETCHER, SQLFunction.UPPER, value); |
| } |
| } |
| |
| /** |
| * Lower() entity function. |
| * |
| */ |
| public static class LOWER extends EntityFunctionSingle<String> { |
| public static Fetcher<String> FETCHER = new Fetcher<String>() { |
| public String getValue(Object value) { return value.toString().toLowerCase(); } |
| }; |
| |
| private LOWER(Object value) { |
| super(FETCHER, SQLFunction.LOWER, value); |
| } |
| } |
| |
| public static abstract class EntityFunctionSingle<T extends Comparable<?>> extends EntityFunction<T> { |
| protected EntityFunctionSingle(Fetcher<T> fetcher, SQLFunction function, Object value) { |
| super(fetcher, function, value); |
| } |
| } |
| |
| public static abstract class EntityFunctionNested<T extends Comparable<?>> extends EntityFunction<T> { |
| protected EntityFunctionNested(Fetcher<T> fetcher, SQLFunction function, EntityConditionValue nested) { |
| super(fetcher, function, nested); |
| } |
| } |
| |
| protected final SQLFunction function; |
| protected final EntityConditionValue nested; |
| protected final Object value; |
| protected final Fetcher<T> fetcher; |
| protected ModelField field; |
| |
| protected EntityFunction(Fetcher<T> fetcher, SQLFunction function, EntityConditionValue nested) { |
| this.fetcher = fetcher; |
| this.function = function; |
| this.nested = nested; |
| this.value = null; |
| } |
| |
| protected EntityFunction(Fetcher<T> fetcher, SQLFunction function, Object value) { |
| this.fetcher = fetcher; |
| this.function = function; |
| if (value instanceof EntityConditionValue) { |
| this.nested = (EntityConditionValue) value; |
| this.value = null; |
| } else { |
| this.nested = null; |
| this.value = value; |
| } |
| } |
| |
| @Override |
| public EntityConditionValue freeze() { |
| if (nested != null) { |
| return new EntityFunctionNested<T>(fetcher, function, nested.freeze()) {}; |
| } else { |
| return new EntityFunctionSingle<T>(fetcher, function, value) {}; |
| } |
| } |
| |
| public String getCode() { |
| return function.name(); |
| } |
| |
| public Object getOriginalValue() { |
| return this.value; |
| } |
| |
| public int getId() { |
| return function.ordinal(); |
| } |
| |
| @Override |
| public int hashCode() { |
| return function.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof EntityFunction<?>)) return false; |
| EntityFunction<?> otherFunc = UtilGenerics.cast(obj); |
| return (this.function == otherFunc.function && |
| (this.nested != null ? nested.equals(otherFunc.nested) : otherFunc.nested == null) && |
| (this.value != null ? value.equals(otherFunc.value) : otherFunc.value == null)); |
| } |
| |
| @Override |
| public void addSqlValue(StringBuilder sql, Map<String, String> tableAliases, ModelEntity modelEntity, List<EntityConditionParam> entityConditionParams, boolean includeTableNamePrefix, Datasource datasourceinfo) { |
| sql.append(function.name()).append('('); |
| if (nested != null) { |
| nested.addSqlValue(sql, tableAliases, modelEntity, entityConditionParams, includeTableNamePrefix, datasourceinfo); |
| } else { |
| addValue(sql, null, value, entityConditionParams); |
| } |
| sql.append(')'); |
| } |
| |
| @Override |
| public void visit(EntityConditionVisitor visitor) { |
| if (nested != null) { |
| visitor.acceptEntityConditionValue(nested); |
| } else { |
| visitor.acceptObject(value); |
| } |
| } |
| |
| @Override |
| public void accept(EntityConditionVisitor visitor) { |
| visitor.acceptEntityFunction(this); |
| } |
| |
| @Override |
| public ModelField getModelField(ModelEntity modelEntity) { |
| if (nested != null) { |
| return nested.getModelField(modelEntity); |
| } |
| return field; |
| } |
| |
| @Override |
| public void setModelField(ModelField field) { |
| this.field = field; |
| } |
| |
| @Override |
| public void validateSql(ModelEntity modelEntity) throws GenericModelException { |
| if (nested != null) { |
| nested.validateSql(modelEntity); |
| } |
| } |
| |
| @Override |
| public Object getValue(Delegator delegator, Map<String, ? extends Object> map) { |
| Object value = nested != null ? nested.getValue(delegator, map) : this.value; |
| return value != null ? fetcher.getValue(value) : null; |
| } |
| } |