RestoreBlobsInputFromScript.java

/*
 * (C) Copyright 2012 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * Licensed 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.
 *
 * Contributors: Sun Seng David TAN <stan@nuxeo.com>
 */
package org.nuxeo.ecm.automation.core.operations;

import org.mvel2.CompileException;
import org.nuxeo.ecm.automation.OperationContext;
import org.nuxeo.ecm.automation.core.Constants;
import org.nuxeo.ecm.automation.core.annotations.Context;
import org.nuxeo.ecm.automation.core.annotations.Operation;
import org.nuxeo.ecm.automation.core.annotations.OperationMethod;
import org.nuxeo.ecm.automation.core.annotations.Param;
import org.nuxeo.ecm.automation.core.scripting.Expression;
import org.nuxeo.ecm.automation.core.scripting.Scripting;
import org.nuxeo.ecm.automation.core.util.BlobList;

/**
 * Run a script and return the result Blobs object of the script the output of the operation
 *
 * @since 5.6
 */
@Operation(id = RestoreBlobsInputFromScript.ID, category = Constants.CAT_EXECUTION, label = "Restore input blobs from a script", description = "Run a script and return the result Blobs object of the script the output of the operation")
public class RestoreBlobsInputFromScript {

    public static final String ID = "Context.RestoreBlobsInputFromScript";

    @Context
    protected OperationContext ctx;

    @Param(name = "script", widget = Constants.W_MULTILINE_TEXT)
    protected String script;

    private volatile Expression expr;

    @OperationMethod
    public BlobList run() throws CompileException, RuntimeException {
        if (expr == null) {
            String text = script.replaceAll("<", "<");
            text = text.replaceAll(">", ">");
            text = text.replaceAll("&", "&");
            expr = Scripting.newExpression(text);
        }
        return (BlobList) expr.eval(ctx);
    }

}