Examples with StringWriter java.io.StringWriter used on opensource projects

Example 46 with StringWriter

use of java.io.StringWriter in project groovy by apache.

the class StringEscapeUtils method unescapeJava.

/**
     * Unescapes any Java literals found in the <code>String</code>.
     * For example, it will turn a sequence of <code>'\'</code> and
     * <code>'n'</code> into a newline character, unless the <code>'\'</code>
     * is preceded by another <code>'\'</code>.
     * 
     * @param str  the <code>String</code> to unescape, may be null
     * @return a new unescaped <code>String</code>, <code>null</code> if null string input
     */
public static String unescapeJava(String str) {
    if (str == null) {
        return null;
    }
    try {
        StringWriter writer = new StringWriter(str.length());
        unescapeJava(writer, str);
        return writer.toString();
    } catch (IOException ioe) {
        // this should never ever happen while writing to a StringWriter
        throw new RuntimeException(ioe);
    }
}

Example 47 with StringWriter

use of java.io.StringWriter in project hadoop by apache.

the class MetricsSystemImpl method currentConfig.

@Override
public synchronized String currentConfig() {
    PropertiesConfiguration saver = new PropertiesConfiguration();
    StringWriter writer = new StringWriter();
    saver.copy(config);
    try {
        saver.write(writer);
    } catch (Exception e) {
        throw new MetricsConfigException("Error stringify config", e);
    }
    return writer.toString();
}

Example 48 with StringWriter

use of java.io.StringWriter in project flink by apache.

the class JsonMapper method getOptimizerPropertiesJson.

public static String getOptimizerPropertiesJson(JsonFactory jsonFactory, PlanNode node) {
    try {
        final StringWriter writer = new StringWriter(256);
        final JsonGenerator gen = jsonFactory.createGenerator(writer);
        final OptimizerNode optNode = node.getOptimizerNode();
        gen.writeStartObject();
        // global properties
        if (node.getGlobalProperties() != null) {
            GlobalProperties gp = node.getGlobalProperties();
            gen.writeArrayFieldStart("global_properties");
            addProperty(gen, "Partitioning", gp.getPartitioning().name());
            if (gp.getPartitioningFields() != null) {
                addProperty(gen, "Partitioned on", gp.getPartitioningFields().toString());
            }
            if (gp.getPartitioningOrdering() != null) {
                addProperty(gen, "Partitioning Order", gp.getPartitioningOrdering().toString());
            } else {
                addProperty(gen, "Partitioning Order", "(none)");
            }
            if (optNode.getUniqueFields() == null || optNode.getUniqueFields().size() == 0) {
                addProperty(gen, "Uniqueness", "not unique");
            } else {
                addProperty(gen, "Uniqueness", optNode.getUniqueFields().toString());
            }
            gen.writeEndArray();
        }
        // local properties
        if (node.getLocalProperties() != null) {
            LocalProperties lp = node.getLocalProperties();
            gen.writeArrayFieldStart("local_properties");
            if (lp.getOrdering() != null) {
                addProperty(gen, "Order", lp.getOrdering().toString());
            } else {
                addProperty(gen, "Order", "(none)");
            }
            if (lp.getGroupedFields() != null && lp.getGroupedFields().size() > 0) {
                addProperty(gen, "Grouped on", lp.getGroupedFields().toString());
            } else {
                addProperty(gen, "Grouping", "not grouped");
            }
            if (optNode.getUniqueFields() == null || optNode.getUniqueFields().size() == 0) {
                addProperty(gen, "Uniqueness", "not unique");
            } else {
                addProperty(gen, "Uniqueness", optNode.getUniqueFields().toString());
            }
            gen.writeEndArray();
        }
        // output size estimates
        {
            gen.writeArrayFieldStart("estimates");
            addProperty(gen, "Est. Output Size", optNode.getEstimatedOutputSize() == -1 ? "(unknown)" : formatNumber(optNode.getEstimatedOutputSize(), "B"));
            addProperty(gen, "Est. Cardinality", optNode.getEstimatedNumRecords() == -1 ? "(unknown)" : formatNumber(optNode.getEstimatedNumRecords()));
            gen.writeEndArray();
        }
        // output node cost
        if (node.getNodeCosts() != null) {
            gen.writeArrayFieldStart("costs");
            addProperty(gen, "Network", node.getNodeCosts().getNetworkCost() == -1 ? "(unknown)" : formatNumber(node.getNodeCosts().getNetworkCost(), "B"));
            addProperty(gen, "Disk I/O", node.getNodeCosts().getDiskCost() == -1 ? "(unknown)" : formatNumber(node.getNodeCosts().getDiskCost(), "B"));
            addProperty(gen, "CPU", node.getNodeCosts().getCpuCost() == -1 ? "(unknown)" : formatNumber(node.getNodeCosts().getCpuCost(), ""));
            addProperty(gen, "Cumulative Network", node.getCumulativeCosts().getNetworkCost() == -1 ? "(unknown)" : formatNumber(node.getCumulativeCosts().getNetworkCost(), "B"));
            addProperty(gen, "Cumulative Disk I/O", node.getCumulativeCosts().getDiskCost() == -1 ? "(unknown)" : formatNumber(node.getCumulativeCosts().getDiskCost(), "B"));
            addProperty(gen, "Cumulative CPU", node.getCumulativeCosts().getCpuCost() == -1 ? "(unknown)" : formatNumber(node.getCumulativeCosts().getCpuCost(), ""));
            gen.writeEndArray();
        }
        // compiler hints
        if (optNode.getOperator().getCompilerHints() != null) {
            CompilerHints hints = optNode.getOperator().getCompilerHints();
            CompilerHints defaults = new CompilerHints();
            String size = hints.getOutputSize() == defaults.getOutputSize() ? "(none)" : String.valueOf(hints.getOutputSize());
            String card = hints.getOutputCardinality() == defaults.getOutputCardinality() ? "(none)" : String.valueOf(hints.getOutputCardinality());
            String width = hints.getAvgOutputRecordSize() == defaults.getAvgOutputRecordSize() ? "(none)" : String.valueOf(hints.getAvgOutputRecordSize());
            String filter = hints.getFilterFactor() == defaults.getFilterFactor() ? "(none)" : String.valueOf(hints.getFilterFactor());
            gen.writeArrayFieldStart("compiler_hints");
            addProperty(gen, "Output Size (bytes)", size);
            addProperty(gen, "Output Cardinality", card);
            addProperty(gen, "Avg. Output Record Size (bytes)", width);
            addProperty(gen, "Filter Factor", filter);
            gen.writeEndArray();
        }
        gen.writeEndObject();
        gen.close();
        return writer.toString();
    } catch (Exception e) {
        return "{}";
    }
}

Example 49 with StringWriter

use of java.io.StringWriter in project flink by apache.

the class PlanJSONDumpGenerator method getOptimizerPlanAsJSON.

public String getOptimizerPlanAsJSON(OptimizedPlan plan) {
    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    dumpOptimizerPlanAsJSON(plan, pw);
    pw.close();
    return sw.toString();
}

Example 50 with StringWriter

use of java.io.StringWriter in project groovy by apache.

the class InvokerHelper method append.

/**
     * Appends an object to an Appendable using Groovy's default representation for the object.
     */
public static void append(Appendable out, Object object) throws IOException {
    if (object instanceof String) {
        out.append((String) object);
    } else if (object instanceof Object[]) {
        out.append(toArrayString((Object[]) object));
    } else if (object instanceof Map) {
        out.append(toMapString((Map) object));
    } else if (object instanceof Collection) {
        out.append(toListString((Collection) object));
    } else if (object instanceof Writable) {
        Writable writable = (Writable) object;
        StringWriter stringWriter = new StringWriter();
        writable.writeTo(stringWriter);
        out.append(stringWriter.toString());
    } else if (object instanceof InputStream || object instanceof Reader) {
        // Copy stream to stream
        Reader reader;
        if (object instanceof InputStream) {
            reader = new InputStreamReader((InputStream) object);
        } else {
            reader = (Reader) object;
        }
        char[] chars = new char[8192];
        int i;
        while ((i = reader.read(chars)) != -1) {
            for (int j = 0; j < i; j++) {
                out.append(chars[j]);
            }
        }
        reader.close();
    } else {
        out.append(toString(object));
    }
}