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ActiveMQ example source code file (CHeadersGenerator.java)

This example ActiveMQ source code file (CHeadersGenerator.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

apache, arraylist, io, iterator, iterator, jclass, jclass, license, license, object, ow_commands_v, see, string, string, util, you

The ActiveMQ CHeadersGenerator.java source code

/**
 * 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.activemq.openwire.tool;

import java.io.File;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;

import org.codehaus.jam.JAnnotation;
import org.codehaus.jam.JAnnotationValue;
import org.codehaus.jam.JClass;
import org.codehaus.jam.JProperty;

/**
 * 
 */
public class CHeadersGenerator extends SingleSourceGenerator {

    protected String targetDir = "./src/lib/openwire";

    public Object run() {
        filePostFix = ".h";
        if (destFile == null) {
            destFile = new File(targetDir + "/ow_commands_v" + getOpenwireVersion() + ".h");
        }
        return super.run();
    }

    public String getTargetDir() {
        return targetDir;
    }

    public void setTargetDir(String targetDir) {
        this.targetDir = targetDir;
    }

    protected void generateLicence(PrintWriter out) {
        out.println("/**");
        out.println(" * Licensed to the Apache Software Foundation (ASF) under one or more");
        out.println(" * contributor license agreements.  See the NOTICE file distributed with");
        out.println(" * this work for additional information regarding copyright ownership.");
        out.println(" * The ASF licenses this file to You under the Apache License, Version 2.0");
        out.println(" * (the \"License\"); you may not use this file except in compliance with");
        out.println(" * the License.  You may obtain a copy of the License at");
        out.println(" *");
        out.println(" *      http://www.apache.org/licenses/LICENSE-2.0");
        out.println(" *");
        out.println(" * Unless required by applicable law or agreed to in writing, software");
        out.println(" * distributed under the License is distributed on an \"AS IS\" BASIS,");
        out.println(" * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.");
        out.println(" * See the License for the specific language governing permissions and");
        out.println(" * limitations under the License.");
        out.println(" */");
    }

    String changeCase(String value) {
        StringBuffer b = new StringBuffer();
        char[] cs = value.toCharArray();
        for (int i = 0; i < cs.length; i++) {
            char c = cs[i];
            if (Character.isUpperCase((char)c)) {
                b.append('_');
                b.append(Character.toLowerCase((char)c));
            } else {
                b.append(c);
            }
        }
        return b.toString();
    }

    String toPropertyCase(String value) {
        return value.substring(0, 1).toLowerCase() + value.substring(1);
    }

    /**
     * Sort the class list so that base classes come up first.
     */
    protected List<JClass> sort(List source) {
        LinkedHashMap<JClass, JClass> rc = new LinkedHashMap();
        ArrayList classes = new ArrayList(source);
        Collections.sort(classes, new Comparator() {
            public int compare(Object o1, Object o2) {
                JClass c1 = (JClass)o1;
                JClass c2 = (JClass)o2;
                return c1.getSimpleName().compareTo(c2.getSimpleName());
            }
        });

        // lets make a map of all the class names
        HashMap<JClass, JClass> classNames = new HashMap();
        for (Iterator iter = classes.iterator(); iter.hasNext();) {
            JClass c = (JClass)iter.next();
            classNames.put(c, c);
        }

        // Add all classes that have no parent first
        for (Iterator iter = classes.iterator(); iter.hasNext();) {
            JClass c = (JClass)iter.next();
            if (!classNames.containsKey(c.getSuperclass())) {
                rc.put(c, c);
            }
        }

        // now lets add the rest
        for (Iterator iter = classes.iterator(); iter.hasNext();) {
            JClass c = (JClass)iter.next();
            if (!rc.containsKey(c)) {
                rc.put(c, c);
            }
        }

        return new ArrayList<JClass>(rc.keySet());
    }

    void generateFields(PrintWriter out, JClass jclass) {

        if (jclass.getSuperclass() == null || jclass.getSuperclass().getSimpleName().equals("Object")) {
            out.println("");
            out.println("   ow_byte structType;");
        } else {
            generateFields(out, jclass.getSuperclass());
        }

        ArrayList<JProperty> properties = new ArrayList();
        jclass.getDeclaredProperties();
        for (int i = 0; i < jclass.getDeclaredProperties().length; i++) {
            JProperty p = jclass.getDeclaredProperties()[i];
            if (isValidProperty(p)) {
                properties.add(p);
            }
        }
        for (Iterator<JProperty> iter = properties.iterator(); iter.hasNext();) {
            JProperty property = iter.next();
            JAnnotation annotation = property.getGetter().getAnnotation("openwire:property");
//            JAnnotationValue size = annotation.getValue("size");
            String name = toPropertyCase(property.getSimpleName());
//            boolean cached = isCachedProperty(property);

            String type = property.getType().getQualifiedName();
            if (type.equals("boolean")) {
                out.println("   ow_" + type + " " + name + ";");
            } else if (type.equals("byte")) {
                out.println("   ow_" + type + " " + name + ";");
            } else if (type.equals("char")) {
                out.println("   ow_" + type + " " + name + ";");
            } else if (type.equals("short")) {
                out.println("   ow_" + type + " " + name + ";");
            } else if (type.equals("int")) {
                out.println("   ow_" + type + " " + name + ";");
            } else if (type.equals("long")) {
                out.println("   ow_" + type + " " + name + ";");
            } else if (type.equals("byte[]")) {
                out.println("   ow_byte_array *" + name + ";");
            } else if (type.equals("org.apache.activeio.packet.ByteSequence")) {
                out.println("   ow_byte_array *" + name + ";");
            } else if (type.equals("org.apache.activeio.packet.ByteSequence")) {
                out.println("   ow_byte_array *" + name + ";");
            } else if (type.equals("java.lang.String")) {
                out.println("   ow_string *" + name + ";");
            } else {
                if (property.getType().isArrayType()) {
                    out.println("   ow_DataStructure_array *" + name + ";");
                } else if (isThrowable(property.getType())) {
                    out.println("   ow_throwable *" + name + ";");
                } else {
                    out.println("   struct ow_" + property.getType().getSimpleName() + " *" + name + ";");
                }
            }
        }
    }

    protected void generateSetup(PrintWriter out) {
        generateLicence(out);
        out.println("");
        out.println("/*****************************************************************************************");
        out.println(" *  ");
        out.println(" * NOTE!: This file is auto generated - do not modify!");
        out.println(" *        if you need to make a change, please see the modify the groovy scripts in the");
        out.println(" *        under src/gram/script and then use maven openwire:generate to regenerate ");
        out.println(" *        this file.");
        out.println(" *  ");
        out.println(" *****************************************************************************************/");
        out.println(" ");
        out.println("#ifndef OW_COMMANDS_V" + openwireVersion + "_H");
        out.println("#define OW_COMMANDS_V" + openwireVersion + "_H");
        out.println("");
        out.println("#include \"ow.h\"");
        out.println("");
        out.println("#ifdef __cplusplus");
        out.println("extern \"C\" {");
        out.println("#endif /* __cplusplus */");
        out.println("      ");
        out.println("#define OW_WIREFORMAT_VERSION " + openwireVersion + "");

        out.println("#define OW_WIREFORMAT_STACK_TRACE_MASK     0x00000001;");
        out.println("#define OW_WIREFORMAT_TCP_NO_DELAY_MASK    0x00000002;");
        out.println("#define OW_WIREFORMAT_CACHE_MASK           0x00000004;");
        out.println("#define OW_WIREFORMAT_COMPRESSION_MASK     0x00000008;");

        for (Iterator iterator = sortedClasses.iterator(); iterator.hasNext();) {
            JClass jclass = (JClass)iterator.next();
            String name = jclass.getSimpleName();
            String type = ("ow_" + name).toUpperCase() + "_TYPE";
            if (!isAbstract(jclass)) {
                out.println("#define " + type + " " + getOpenWireOpCode(jclass));
            }
        }

        out.println("      ");
        out.println("apr_status_t ow_bitmarshall(ow_bit_buffer *buffer, ow_DataStructure *object);");
        out.println("apr_status_t ow_marshall(ow_byte_buffer *buffer, ow_DataStructure *object);");
    }

    protected void generateFile(PrintWriter out) throws Exception {

        String structName = jclass.getSimpleName();

        out.println("");
        out.println("typedef struct ow_" + structName + " {");

        // This recusivly generates the field definitions of the class and it's
        // supper classes.
        generateFields(out, jclass);

        out.println("");
        out.println("} ow_" + structName + ";");
        out.println("ow_" + structName + " *ow_" + structName + "_create(apr_pool_t *pool);");
        out.println("ow_boolean ow_is_a_" + structName + "(ow_DataStructure *object);");

    }

    protected void generateTearDown(PrintWriter out) {
        out.println("");
        out.println("#ifdef __cplusplus");
        out.println("}");
        out.println("#endif");
        out.println("");
        out.println("#endif  /* ! OW_COMMANDS_V" + openwireVersion + "_H */");
    }
}

Other ActiveMQ examples (source code examples)

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