001: /*--
002:
003: Copyright (C) 2002-2005 Adrian Price.
004: All rights reserved.
005:
006: Redistribution and use in source and binary forms, with or without
007: modification, are permitted provided that the following conditions
008: are met:
009:
010: 1. Redistributions of source code must retain the above copyright
011: notice, this list of conditions, and the following disclaimer.
012:
013: 2. Redistributions in binary form must reproduce the above copyright
014: notice, this list of conditions, and the disclaimer that follows
015: these conditions in the documentation and/or other materials
016: provided with the distribution.
017:
018: 3. The names "OBE" and "Open Business Engine" must not be used to
019: endorse or promote products derived from this software without prior
020: written permission. For written permission, please contact
021: adrianprice@sourceforge.net.
022:
023: 4. Products derived from this software may not be called "OBE" or
024: "Open Business Engine", nor may "OBE" or "Open Business Engine"
025: appear in their name, without prior written permission from
026: Adrian Price (adrianprice@users.sourceforge.net).
027:
028: THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
029: WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
030: OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
031: DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
032: INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
033: (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
034: SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
035: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
036: STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
037: IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
038: POSSIBILITY OF SUCH DAMAGE.
039:
040: For more information on OBE, please see
041: <http://obe.sourceforge.net/>.
042:
043: */
044:
045: package org.obe.runtime.tool;
046:
047: import org.obe.XMLException;
048: import org.obe.client.api.repository.RepositoryException;
049: import org.obe.client.api.repository.ScriptMetaData;
050: import org.obe.spi.WorkflowContext;
051: import org.obe.xpdl.OBENames;
052: import org.obe.xpdl.model.activity.Tool;
053: import org.obe.xpdl.model.misc.ExtendedAttributes;
054:
055: import java.io.BufferedReader;
056: import java.io.IOException;
057: import java.io.InputStream;
058: import java.io.InputStreamReader;
059:
060: /**
061: * A tool agent that executes a script.
062: *
063: * @author Adrian Price
064: */
065: public abstract class Script extends AbstractToolAgent {
066: private static final long serialVersionUID = -6547066833390227911L;
067:
068: private final ScriptMetaData _metadata;
069:
070: protected Script(ScriptMetaData metadata) {
071: _metadata = metadata;
072: }
073:
074: protected String readScript() throws IOException, XMLException,
075: RepositoryException {
076: // Script source can be supplied by the XPDL as an extended attribute,
077: // or can be defined in the tool agent factory configuration file,
078: // either inline or in an external file.
079: WorkflowContext ctx = getWorkflowContext();
080: Tool tool = ctx.getTool();
081: ExtendedAttributes extAttrs = tool.getExtendedAttributes();
082: String script = extAttrs == null ? null : extAttrs
083: .get(OBENames.OBE_SCRIPT);
084: if (script == null) {
085: if (_metadata.isFile()) {
086: InputStream in = ctx.getServiceManager()
087: .getResourceRepository().findEntity(
088: _metadata.getScript());
089: try {
090: BufferedReader brdr = new BufferedReader(
091: new InputStreamReader(in));
092: StringBuffer sb = new StringBuffer();
093: String line;
094: while ((line = brdr.readLine()) != null) {
095: sb.append(line);
096: sb.append('\n');
097: }
098: script = sb.toString();
099: } finally {
100: in.close();
101: }
102: } else {
103: script = _metadata.getScript();
104: }
105: }
106: return script;
107: }
108: }
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