| /* |
| * 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.jackrabbit.oak.query; |
| |
| import java.net.URI; |
| import javax.jcr.PropertyType; |
| |
| import org.apache.jackrabbit.oak.api.Blob; |
| import org.apache.jackrabbit.oak.api.PropertyValue; |
| import org.apache.jackrabbit.oak.api.Type; |
| import org.apache.jackrabbit.oak.namepath.NamePathMapper; |
| import org.apache.jackrabbit.oak.plugins.memory.PropertyValues; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class ValueConverter { |
| |
| private static final Logger log = LoggerFactory.getLogger(ValueConverter.class); |
| |
| private ValueConverter() {} |
| |
| public static boolean canConvert(int sourceType, int targetType) { |
| if (sourceType == targetType || |
| sourceType == PropertyType.UNDEFINED || |
| targetType == PropertyType.UNDEFINED) { |
| return true; |
| } |
| switch (targetType) { |
| case PropertyType.BINARY: |
| case PropertyType.BOOLEAN: |
| case PropertyType.DATE: |
| case PropertyType.DOUBLE: |
| case PropertyType.LONG: |
| case PropertyType.DECIMAL: |
| case PropertyType.STRING: |
| return true; |
| case PropertyType.NAME: |
| case PropertyType.PATH: |
| case PropertyType.URI: |
| switch (sourceType) { |
| case PropertyType.NAME: |
| case PropertyType.PATH: |
| case PropertyType.URI: |
| return true; |
| } |
| break; |
| case PropertyType.REFERENCE: |
| case PropertyType.WEAKREFERENCE: |
| switch (sourceType) { |
| case PropertyType.REFERENCE: |
| case PropertyType.WEAKREFERENCE: |
| return true; |
| } |
| break; |
| } |
| if (sourceType == PropertyType.STRING || |
| sourceType == PropertyType.BINARY) { |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Converts the given value to a value of the specified target type. The |
| * conversion is performed according to the rules described in |
| * "3.6.4 Property Type Conversion" in the JCR 2.0 specification. |
| * |
| * @param value the value to convert |
| * @param targetType the target property type |
| * @param mapper the name mapper or {@code null} if no name/path mapping is required. |
| * @return the converted value |
| * @throws IllegalArgumentException if mapping is illegal |
| */ |
| public static PropertyValue convert(@NotNull PropertyValue value, int targetType, @Nullable NamePathMapper mapper) { |
| int sourceType = value.getType().tag(); |
| if (sourceType == targetType) { |
| return value; |
| } |
| switch (targetType) { |
| case PropertyType.BINARY: |
| Blob blob = value.getValue(Type.BINARY); |
| return PropertyValues.newBinary(blob); |
| case PropertyType.BOOLEAN: |
| return PropertyValues.newBoolean(value.getValue(Type.BOOLEAN)); |
| case PropertyType.DATE: |
| return PropertyValues.newDate(value.getValue(Type.DATE)); |
| case PropertyType.DOUBLE: |
| return PropertyValues.newDouble(value.getValue(Type.DOUBLE)); |
| case PropertyType.LONG: |
| return PropertyValues.newLong(value.getValue(Type.LONG)); |
| case PropertyType.DECIMAL: |
| return PropertyValues.newDecimal(value.getValue(Type.DECIMAL)); |
| } |
| // for other types, the value is first converted to a string |
| String v = value.getValue(Type.STRING); |
| switch (targetType) { |
| case PropertyType.STRING: |
| return PropertyValues.newString(v); |
| case PropertyType.PATH: |
| switch (sourceType) { |
| case PropertyType.BINARY: |
| case PropertyType.STRING: |
| case PropertyType.NAME: |
| return PropertyValues.newPath(v); |
| case PropertyType.URI: |
| URI uri = URI.create(v); |
| if (uri.isAbsolute()) { |
| // uri contains scheme |
| throw new IllegalArgumentException( |
| "Failed to convert URI " + v + " to PATH"); |
| } |
| String p = uri.getPath(); |
| if (p.startsWith("./")) { |
| p = p.substring(2); |
| } |
| return PropertyValues.newPath(v); |
| } |
| break; |
| case PropertyType.NAME: |
| switch (sourceType) { |
| case PropertyType.BINARY: |
| case PropertyType.STRING: |
| case PropertyType.PATH: |
| // path might be a name (relative path of length 1) |
| // try conversion via string |
| return PropertyValues.newName(getOakPath(v, mapper)); |
| case PropertyType.URI: |
| URI uri = URI.create(v); |
| if (uri.isAbsolute()) { |
| // uri contains scheme |
| throw new IllegalArgumentException( |
| "Failed to convert URI " + v + " to PATH"); |
| } |
| String p = uri.getPath(); |
| if (p.startsWith("./")) { |
| p = p.substring(2); |
| } |
| return PropertyValues.newName(getOakPath(v, mapper)); |
| } |
| break; |
| case PropertyType.REFERENCE: |
| switch (sourceType) { |
| case PropertyType.BINARY: |
| case PropertyType.STRING: |
| case PropertyType.WEAKREFERENCE: |
| return PropertyValues.newReference(v); |
| } |
| break; |
| case PropertyType.WEAKREFERENCE: |
| switch (sourceType) { |
| case PropertyType.BINARY: |
| case PropertyType.STRING: |
| case PropertyType.REFERENCE: |
| return PropertyValues.newWeakReference(v); |
| } |
| break; |
| case PropertyType.URI: |
| switch (sourceType) { |
| case PropertyType.BINARY: |
| case PropertyType.STRING: |
| return PropertyValues.newUri(v); |
| case PropertyType.NAME: |
| // prefix name with "./" (JCR 2.0 spec 3.6.4.8) |
| return PropertyValues.newUri("./" + v); |
| case PropertyType.PATH: |
| // prefix name with "./" (JCR 2.0 spec 3.6.4.9) |
| return PropertyValues.newUri("./" + v); |
| } |
| } |
| throw new IllegalArgumentException( |
| "Unsupported conversion from property type " + |
| PropertyType.nameFromValue(sourceType) + |
| " to property type " + |
| PropertyType.nameFromValue(targetType)); |
| } |
| |
| private static String getOakPath(@NotNull String jcrPath, @Nullable NamePathMapper mapper) { |
| if (mapper == null) { |
| // to simplify testing, a getNamePathMapper isn't required |
| return jcrPath; |
| } |
| String p = mapper.getOakPath(jcrPath); |
| if (p == null) { |
| throw new IllegalArgumentException("Not a valid JCR path: " |
| + jcrPath); |
| } |
| return p; |
| } |
| } |