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/*******************************************************************************
* Copyright (c) 2013 Boeing.
* 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:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.jaxrs.server.internal.ext;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.HashSet;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.osee.framework.jdk.core.type.OseeArgumentException;
import org.eclipse.osee.framework.jdk.core.type.OseeCoreException;
import org.eclipse.osee.framework.jdk.core.util.Conditions;
import org.eclipse.osee.framework.jdk.core.util.Lib;
import com.google.common.io.InputSupplier;
/**
* @author David W. Miller
*/
public class RestResourceConcatenator {
private final Set<String> resources = new HashSet<String>();
private String header;
private String footer;
private Pattern resourcePattern = null;
public void initialize(String xmlTag) {
if (resourcePattern != null) {
throw new OseeArgumentException("Already initialized");
}
validateTag(xmlTag);
String regex = String.format("(.*?<%s.*?>)(.+?)(</%s>)", xmlTag, xmlTag);
resourcePattern = Pattern.compile(regex, Pattern.DOTALL);
}
@Override
public String toString() {
return String.format("%s Object: \n contents {%s}\n", this.getClass().getName(), getResources());
}
public void addResource(InputSupplier<? extends InputStream> supplier) throws IOException {
Conditions.checkNotNull(supplier, "InputStreamSupplier");
InputStream is = null;
try {
is = supplier.getInput();
processResource(Lib.inputStreamToString(is));
} finally {
Lib.close(is);
}
}
public InputStream getAsInputStream() throws UnsupportedEncodingException {
if (resources.isEmpty() || header == null || footer == null) {
throw new OseeCoreException("Rest resource not ready - no data");
}
return Lib.stringToInputStream(getResources());
}
public String getResources() {
StringBuilder sb = new StringBuilder();
sb.append(header);
for (String resource : resources) {
sb.append(resource);
}
sb.append(footer);
return sb.toString();
}
private void processResource(String input) {
Conditions.checkNotNullOrEmpty(input, "bundle resource");
Matcher match = resourcePattern.matcher(input);
while (match.find()) {
if (resources.isEmpty()) {
header = match.group(1);
footer = match.group(3);
}
resources.add(match.group(2));
}
}
private void validateTag(String xmlTag) {
Conditions.checkNotNullOrEmpty(xmlTag, "xmlTag");
// resources can only have three tags: "resourceDoc", "applicationDocs" or "grammars"
boolean valid = false;
if (xmlTag.equals("resourceDoc")) {
valid = true;
} else if (xmlTag.equals("applicationDocs")) {
valid = true;
} else if (xmlTag.equals("grammars")) {
valid = true;
}
if (!valid) {
throw new OseeArgumentException("Invalid resource document tag");
}
}
}
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