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Diffstat (limited to 'sca-java-2.x/branches/2.0-Beta2/modules/binding-rest-runtime/src/main/java/org/apache/tuscany/sca/binding/rest/provider/DataBindingJAXRSProvider.java')
-rw-r--r-- | sca-java-2.x/branches/2.0-Beta2/modules/binding-rest-runtime/src/main/java/org/apache/tuscany/sca/binding/rest/provider/DataBindingJAXRSProvider.java | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/sca-java-2.x/branches/2.0-Beta2/modules/binding-rest-runtime/src/main/java/org/apache/tuscany/sca/binding/rest/provider/DataBindingJAXRSProvider.java b/sca-java-2.x/branches/2.0-Beta2/modules/binding-rest-runtime/src/main/java/org/apache/tuscany/sca/binding/rest/provider/DataBindingJAXRSProvider.java new file mode 100644 index 0000000000..1ccdb868d7 --- /dev/null +++ b/sca-java-2.x/branches/2.0-Beta2/modules/binding-rest-runtime/src/main/java/org/apache/tuscany/sca/binding/rest/provider/DataBindingJAXRSProvider.java @@ -0,0 +1,203 @@ +/* + * 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.tuscany.sca.binding.rest.provider; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.io.OutputStream; +import java.io.Reader; +import java.io.StringWriter; +import java.lang.annotation.Annotation; +import java.lang.reflect.Type; + +import javax.activation.DataSource; +import javax.jws.WebParam; +import javax.jws.WebResult; +import javax.ws.rs.core.MediaType; +import javax.ws.rs.ext.Provider; +import javax.xml.namespace.QName; + +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.core.UtilityExtensionPoint; +import org.apache.tuscany.sca.databinding.DataBindingExtensionPoint; +import org.apache.tuscany.sca.databinding.Mediator; +import org.apache.tuscany.sca.interfacedef.DataType; +import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl; +import org.apache.tuscany.sca.interfacedef.util.XMLType; + +/** + * A JAX-RS provider that leverages Tuscany's databinding framework to handle read/write + * for JAX-RS runtime + */ +@Provider +public abstract class DataBindingJAXRSProvider { + protected DataBindingExtensionPoint dataBindingExtensionPoint; + protected Mediator mediator; + + public DataBindingJAXRSProvider(ExtensionPointRegistry registry) { + this.dataBindingExtensionPoint = registry.getExtensionPoint(DataBindingExtensionPoint.class); + UtilityExtensionPoint utilities = registry.getExtensionPoint(UtilityExtensionPoint.class); + this.mediator = utilities.getUtility(Mediator.class); + } + + protected <A extends Annotation> A getAnnotation(Annotation[] annotations, Class<A> type) { + for (Annotation a : annotations) { + if (a.annotationType() == type) { + return type.cast(a); + } + } + return null; + } + + protected void introspectAnnotations(Annotation[] annotations, DataType targetDataType) { + WebResult result = getAnnotation(annotations, WebResult.class); + if (result != null) { + QName name = new QName(result.targetNamespace(), result.name()); + targetDataType.setLogical(new XMLType(name, null)); + } + + WebParam param = getAnnotation(annotations, WebParam.class); + if (param != null) { + QName name = new QName(param.targetNamespace(), param.name()); + targetDataType.setLogical(new XMLType(name, null)); + } + } + + protected DataType createDataType(Class<?> type, Type genericType) { + DataType dataType = new DataTypeImpl(null, type, type, genericType); + dataBindingExtensionPoint.introspectType(dataType, null); + return dataType; + } + + protected boolean supports(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) { + // Some media types have parameters + mediaType = new MediaType(mediaType.getType(), mediaType.getSubtype()); + return MediaType.APPLICATION_JSON_TYPE.isCompatible(mediaType) || MediaType.APPLICATION_XML_TYPE.isCompatible(mediaType) + || MediaType.TEXT_XML_TYPE.isCompatible(mediaType); + } + + protected Object convert(InputStream content, String contentType, Class<?> type) throws IOException { + if (type == DataSource.class) { + return type.cast(new InputStreamDataSource(content, contentType)); + } else if (type == InputStream.class) { + return type.cast(content); + } else if (type == Reader.class) { + return type.cast(new InputStreamReader(content, "UTF-8")); + } else if (type == String.class) { + try { + StringWriter sw = new StringWriter(); + InputStreamReader reader = new InputStreamReader(content, "UTF-8"); + char[] buf = new char[8192]; + while (true) { + int size = reader.read(buf); + if (size < 0) { + break; + } + sw.write(buf, 0, size); + } + return type.cast(sw.toString()); + } catch (Exception e) { + throw new IllegalArgumentException(e); + } + } else if (type == byte[].class) { + try { + ByteArrayOutputStream bos = new ByteArrayOutputStream(); + byte[] buf = new byte[8192]; + while (true) { + int size = content.read(buf); + if (size < 0) { + break; + } + bos.write(buf, 0, size); + } + return type.cast(bos.toByteArray()); + } catch (Exception e) { + throw new IllegalArgumentException(e); + } + } else { + return content; + } + } + + protected void write(OutputStream out, Object content, Class<?> type) throws IOException { + if (content == null) { + return; + } + InputStream in = null; + if (DataSource.class.isAssignableFrom(type)) { + in = ((DataSource)content).getInputStream(); + } else if (InputStream.class.isAssignableFrom(type)) { + in = (InputStream)content; + } else if (type == String.class) { + in = new ByteArrayInputStream(((String)content).getBytes("UTF-8")); + } else if (type == byte[].class) { + in = new ByteArrayInputStream((byte[])content); + } + if (in == null) { + throw new IllegalArgumentException("Type is not supported: " + type); + } + byte[] buf = new byte[8192]; + while (true) { + int len = in.read(buf); + if (len < 0) { + in.close(); + break; + } + out.write(buf, 0, len); + } + } + + public static final class InputStreamDataSource implements DataSource { + + public static final String DEFAULT_TYPE = "application/octet-stream"; + + private final InputStream in; + private final String ctype; + + public InputStreamDataSource(InputStream in) { + this(in, null); + } + + public InputStreamDataSource(InputStream in, String ctype) { + this.in = in; + this.ctype = (ctype != null) ? ctype : DEFAULT_TYPE; + } + + public String getContentType() { + return ctype; + } + + public String getName() { + return null; + } + + public InputStream getInputStream() throws IOException { + return in; + } + + public OutputStream getOutputStream() throws IOException { + return null; + } + + } +} |