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/*******************************************************************************
* Copyright (c) 2007, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.p2.metadata.repository.io;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.equinox.internal.p2.persistence.XMLWriter;
import org.eclipse.equinox.internal.provisional.p2.metadata.*;
public abstract class MetadataWriter extends XMLWriter implements XMLConstants {
public MetadataWriter(OutputStream output, ProcessingInstruction[] piElements) throws UnsupportedEncodingException {
super(output, piElements);
// TODO: add a processing instruction for the metadata version
}
/**
* Writes a list of {@link IInstallableUnit}.
* @param units An Iterator of {@link IInstallableUnit}.
* @param size The number of units to write
*/
protected void writeInstallableUnits(Iterator units, int size) {
if (size == 0)
return;
start(INSTALLABLE_UNITS_ELEMENT);
attribute(COLLECTION_SIZE_ATTRIBUTE, size);
while (units.hasNext())
writeInstallableUnit((IInstallableUnit) units.next());
end(INSTALLABLE_UNITS_ELEMENT);
}
protected void writeInstallableUnit(IInstallableUnit resolvedIU) {
IInstallableUnit iu = resolvedIU.unresolved();
start(INSTALLABLE_UNIT_ELEMENT);
attribute(ID_ATTRIBUTE, iu.getId());
attribute(VERSION_ATTRIBUTE, iu.getVersion());
attribute(SINGLETON_ATTRIBUTE, iu.isSingleton(), true);
attribute(FRAGMENT_ATTRIBUTE, iu.isFragment(), false);
if (iu.isFragment() && iu instanceof IInstallableUnitFragment) {
IInstallableUnitFragment fragment = (IInstallableUnitFragment) iu;
attribute(FRAGMENT_HOST_ID_ATTRIBUTE, fragment.getHostId());
attribute(FRAGMENT_HOST_RANGE_ATTRIBUTE, fragment.getHostVersionRange());
}
writeUpdateDescriptor(resolvedIU, resolvedIU.getUpdateDescriptor());
writeProperties(iu.getProperties());
writeProvidedCapabilities(iu.getProvidedCapabilities());
writeRequiredCapabilities(iu.getRequiredCapabilities());
writeTrimmedCdata(IU_FILTER_ELEMENT, iu.getFilter());
writeTrimmedCdata(APPLICABILITY_FILTER_ELEMENT, iu.getApplicabilityFilter());
writeArtifactKeys(iu.getArtifacts());
writeTouchpointType(iu.getTouchpointType());
writeTouchpointData(iu.getTouchpointData());
end(INSTALLABLE_UNIT_ELEMENT);
}
protected void writeProvidedCapabilities(ProvidedCapability[] capabilities) {
if (capabilities != null && capabilities.length > 0) {
start(PROVIDED_CAPABILITIES_ELEMENT);
attribute(COLLECTION_SIZE_ATTRIBUTE, capabilities.length);
for (int i = 0; i < capabilities.length; i++) {
start(PROVIDED_CAPABILITY_ELEMENT);
attribute(NAMESPACE_ATTRIBUTE, capabilities[i].getNamespace());
attribute(NAME_ATTRIBUTE, capabilities[i].getName());
attribute(VERSION_ATTRIBUTE, capabilities[i].getVersion());
end(PROVIDED_CAPABILITY_ELEMENT);
}
end(PROVIDED_CAPABILITIES_ELEMENT);
}
}
protected void writeRequiredCapabilities(RequiredCapability[] capabilities) {
if (capabilities != null && capabilities.length > 0) {
start(REQUIRED_CAPABILITIES_ELEMENT);
attribute(COLLECTION_SIZE_ATTRIBUTE, capabilities.length);
for (int i = 0; i < capabilities.length; i++) {
writeRequiredCapability(capabilities[i]);
}
end(REQUIRED_CAPABILITIES_ELEMENT);
}
}
protected void writeUpdateDescriptor(IInstallableUnit iu, IUpdateDescriptor descriptor) {
if (descriptor == null)
return;
start(UPDATE_DESCRIPTOR_ELEMENT);
attribute(ID_ATTRIBUTE, descriptor.getId());
attribute(VERSION_RANGE_ATTRIBUTE, descriptor.getRange());
attribute(UPDATE_DESCRIPTOR_SEVERITY, descriptor.getSeverity());
attribute(DESCRIPTION_ATTRIBUTE, descriptor.getDescription());
end(UPDATE_DESCRIPTOR_ELEMENT);
}
protected void writeRequiredCapability(RequiredCapability capability) {
start(REQUIRED_CAPABILITY_ELEMENT);
attribute(NAMESPACE_ATTRIBUTE, capability.getNamespace());
attribute(NAME_ATTRIBUTE, capability.getName());
attribute(VERSION_RANGE_ATTRIBUTE, capability.getRange());
attribute(CAPABILITY_OPTIONAL_ATTRIBUTE, capability.isOptional(), false);
attribute(CAPABILITY_MULTIPLE_ATTRIBUTE, capability.isMultiple(), false);
writeTrimmedCdata(CAPABILITY_FILTER_ELEMENT, capability.getFilter());
String[] selectors = capability.getSelectors();
if (selectors.length > 0) {
start(CAPABILITY_SELECTORS_ELEMENT);
attribute(COLLECTION_SIZE_ATTRIBUTE, selectors.length);
for (int j = 0; j < selectors.length; j++) {
writeTrimmedCdata(CAPABILITY_SELECTOR_ELEMENT, selectors[j]);
}
end(CAPABILITY_SELECTORS_ELEMENT);
}
end(REQUIRED_CAPABILITY_ELEMENT);
}
protected void writeArtifactKeys(IArtifactKey[] artifactKeys) {
if (artifactKeys != null && artifactKeys.length > 0) {
start(ARTIFACT_KEYS_ELEMENT);
attribute(COLLECTION_SIZE_ATTRIBUTE, artifactKeys.length);
for (int i = 0; i < artifactKeys.length; i++) {
start(ARTIFACT_KEY_ELEMENT);
attribute(ARTIFACT_KEY_NAMESPACE_ATTRIBUTE, artifactKeys[i].getNamespace());
attribute(ARTIFACT_KEY_CLASSIFIER_ATTRIBUTE, artifactKeys[i].getClassifier());
attribute(ID_ATTRIBUTE, artifactKeys[i].getId());
attribute(VERSION_ATTRIBUTE, artifactKeys[i].getVersion());
end(ARTIFACT_KEY_ELEMENT);
}
end(ARTIFACT_KEYS_ELEMENT);
}
}
protected void writeTouchpointType(TouchpointType touchpointType) {
start(TOUCHPOINT_TYPE_ELEMENT);
attribute(ID_ATTRIBUTE, touchpointType.getId());
attribute(VERSION_ATTRIBUTE, touchpointType.getVersion());
end(TOUCHPOINT_TYPE_ELEMENT);
}
protected void writeTouchpointData(TouchpointData[] touchpointData) {
if (touchpointData != null && touchpointData.length > 0) {
start(TOUCHPOINT_DATA_ELEMENT);
attribute(COLLECTION_SIZE_ATTRIBUTE, touchpointData.length);
for (int i = 0; i < touchpointData.length; i++) {
TouchpointData nextData = touchpointData[i];
Map instructions = nextData.getInstructions();
if (instructions.size() > 0) {
start(TOUCHPOINT_DATA_INSTRUCTIONS_ELEMENT);
attribute(COLLECTION_SIZE_ATTRIBUTE, instructions.size());
for (Iterator iter = instructions.entrySet().iterator(); iter.hasNext();) {
Map.Entry entry = (Map.Entry) iter.next();
start(TOUCHPOINT_DATA_INSTRUCTION_ELEMENT);
attribute(TOUCHPOINT_DATA_INSTRUCTION_KEY_ATTRIBUTE, entry.getKey());
cdata((String) entry.getValue(), true);
end(TOUCHPOINT_DATA_INSTRUCTION_ELEMENT);
}
}
}
end(TOUCHPOINT_DATA_ELEMENT);
}
}
private void writeTrimmedCdata(String element, String filter) {
String trimmed;
if (filter != null && (trimmed = filter.trim()).length() > 0) {
start(element);
cdata(trimmed);
end(element);
}
}
}
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