| /** |
| * 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.activemq.openwire.jms.utils; |
| |
| import java.math.BigInteger; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.Date; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.activemq.openwire.commands.OpenWireDestination; |
| import org.fusesource.hawtbuf.UTF8Buffer; |
| |
| /** |
| * Type conversion support for OpenWireMessage property types. |
| */ |
| public final class TypeConversionSupport { |
| |
| private static final Converter IDENTITY_CONVERTER = new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return value; |
| } |
| }; |
| |
| private static class ConversionKey { |
| final Class<?> from; |
| final Class<?> to; |
| final int hashCode; |
| |
| public ConversionKey(Class<?> from, Class<?> to) { |
| this.from = from; |
| this.to = to; |
| this.hashCode = from.hashCode() ^ (to.hashCode() << 1); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| ConversionKey x = (ConversionKey) o; |
| return x.from == from && x.to == to; |
| } |
| |
| @Override |
| public int hashCode() { |
| return hashCode; |
| } |
| } |
| |
| public interface Converter { |
| Object convert(Object value); |
| } |
| |
| private static final Map<ConversionKey, Converter> CONVERSION_MAP = new HashMap<ConversionKey, Converter>(); |
| static { |
| Converter toStringConverter = new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return value.toString(); |
| } |
| }; |
| CONVERSION_MAP.put(new ConversionKey(Boolean.class, String.class), toStringConverter); |
| CONVERSION_MAP.put(new ConversionKey(Byte.class, String.class), toStringConverter); |
| CONVERSION_MAP.put(new ConversionKey(Short.class, String.class), toStringConverter); |
| CONVERSION_MAP.put(new ConversionKey(Integer.class, String.class), toStringConverter); |
| CONVERSION_MAP.put(new ConversionKey(Long.class, String.class), toStringConverter); |
| CONVERSION_MAP.put(new ConversionKey(Float.class, String.class), toStringConverter); |
| CONVERSION_MAP.put(new ConversionKey(Double.class, String.class), toStringConverter); |
| CONVERSION_MAP.put(new ConversionKey(UTF8Buffer.class, String.class), toStringConverter); |
| CONVERSION_MAP.put(new ConversionKey(URI.class, String.class), toStringConverter); |
| CONVERSION_MAP.put(new ConversionKey(BigInteger.class, String.class), toStringConverter); |
| |
| CONVERSION_MAP.put(new ConversionKey(String.class, Boolean.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Boolean.valueOf((String) value); |
| } |
| }); |
| CONVERSION_MAP.put(new ConversionKey(String.class, Byte.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Byte.valueOf((String) value); |
| } |
| }); |
| CONVERSION_MAP.put(new ConversionKey(String.class, Short.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Short.valueOf((String) value); |
| } |
| }); |
| CONVERSION_MAP.put(new ConversionKey(String.class, Integer.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Integer.valueOf((String) value); |
| } |
| }); |
| CONVERSION_MAP.put(new ConversionKey(String.class, Long.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Long.valueOf((String) value); |
| } |
| }); |
| CONVERSION_MAP.put(new ConversionKey(String.class, Float.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Float.valueOf((String) value); |
| } |
| }); |
| CONVERSION_MAP.put(new ConversionKey(String.class, Double.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Double.valueOf((String) value); |
| } |
| }); |
| |
| Converter longConverter = new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Long.valueOf(((Number) value).longValue()); |
| } |
| }; |
| CONVERSION_MAP.put(new ConversionKey(Byte.class, Long.class), longConverter); |
| CONVERSION_MAP.put(new ConversionKey(Short.class, Long.class), longConverter); |
| CONVERSION_MAP.put(new ConversionKey(Integer.class, Long.class), longConverter); |
| CONVERSION_MAP.put(new ConversionKey(Date.class, Long.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Long.valueOf(((Date) value).getTime()); |
| } |
| }); |
| |
| Converter intConverter = new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Integer.valueOf(((Number) value).intValue()); |
| } |
| }; |
| CONVERSION_MAP.put(new ConversionKey(Byte.class, Integer.class), intConverter); |
| CONVERSION_MAP.put(new ConversionKey(Short.class, Integer.class), intConverter); |
| |
| CONVERSION_MAP.put(new ConversionKey(Byte.class, Short.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return Short.valueOf(((Number) value).shortValue()); |
| } |
| }); |
| |
| CONVERSION_MAP.put(new ConversionKey(Float.class, Double.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return new Double(((Number) value).doubleValue()); |
| } |
| }); |
| CONVERSION_MAP.put(new ConversionKey(String.class, OpenWireDestination.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| return OpenWireDestination.createDestination((String) value, OpenWireDestination.QUEUE_TYPE); |
| } |
| }); |
| CONVERSION_MAP.put(new ConversionKey(String.class, URI.class), new Converter() { |
| @Override |
| public Object convert(Object value) { |
| String text = value.toString(); |
| try { |
| return new URI(text); |
| } catch (URISyntaxException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| }); |
| } |
| |
| private TypeConversionSupport() { |
| } |
| |
| public static Object convert(Object value, Class<?> to) { |
| if (value == null) { |
| // lets avoid NullPointerException when converting to boolean for null values |
| if (boolean.class.isAssignableFrom(to)) { |
| return Boolean.FALSE; |
| } |
| return null; |
| } |
| |
| // eager same instance type test to avoid the overhead of invoking the |
| // type converter if already same type |
| if (to.isInstance(value)) { |
| return to.cast(value); |
| } |
| |
| // lookup converter |
| Converter c = lookupConverter(value.getClass(), to); |
| if (c != null) { |
| return c.convert(value); |
| } else { |
| return null; |
| } |
| } |
| |
| public static Converter lookupConverter(Class<?> from, Class<?> to) { |
| // use wrapped type for primitives |
| if (from.isPrimitive()) { |
| from = convertPrimitiveTypeToWrapperType(from); |
| } |
| if (to.isPrimitive()) { |
| to = convertPrimitiveTypeToWrapperType(to); |
| } |
| |
| if (from.equals(to)) { |
| return IDENTITY_CONVERTER; |
| } |
| |
| return CONVERSION_MAP.get(new ConversionKey(from, to)); |
| } |
| |
| /** |
| * Converts primitive types such as int to its wrapper type like |
| * {@link Integer} |
| */ |
| private static Class<?> convertPrimitiveTypeToWrapperType(Class<?> type) { |
| Class<?> rc = type; |
| if (type.isPrimitive()) { |
| if (type == int.class) { |
| rc = Integer.class; |
| } else if (type == long.class) { |
| rc = Long.class; |
| } else if (type == double.class) { |
| rc = Double.class; |
| } else if (type == float.class) { |
| rc = Float.class; |
| } else if (type == short.class) { |
| rc = Short.class; |
| } else if (type == byte.class) { |
| rc = Byte.class; |
| } else if (type == boolean.class) { |
| rc = Boolean.class; |
| } |
| } |
| return rc; |
| } |
| } |